Chemistry Question And Answers (2022)

  • Given the following equation: Fe203 + 3 C – 2 Fe + 3 CO How many grams of Fez03 are required to produce 13.42 grams of Fe?
  • Explain the role of electronegativity in determining the type of intramolecular bond or forces formed.
  • Could you please help to solve the following questions in detail regarding UV-Visible Spectrophotometry? Thank you.. Question 6 Palladium (11) and gold (Ill) can be determined simultaneously by reacti…
  • Hello, I have been given the question below, with the example underneath for what i need to do for each of the four (ÂIonic, Covalent molecular, Covalent networks {including diamond, graphite and s…
  • Given the following equation: 2 KCIO3 – 2 KCI + 3 02 How many grams of O, are produced when 31.00 grams of KCI is formed?
  • can you compare THE SPECIFIC GRAVITY OF ISOPROPANOL AND ETHANOL?. Table C Liquid 1- Alcohol Liquid 2- Water Specific gravity (using B) 775 1.20 Specific gravity (using .800 1.10 hydrometer)
  • The rate of a second-order reaction was measured over temperature range from 700-1000 K. The rate constants are in the table below. Use an Arrhenius plot to find the activation energy and the pre-expo…
  • Hi I was given this question with 8 lines, and then a table of three columns below the lines and i am unsure how to answer it  Give both a general explanation about covalent networks and also explai…
  • Solve and give the COMPLETE solution. For 150 mL of a 5% calcium chloride (CaCl2 . H2O), calculate the number of: a) millimoles b) milliequivalents of Calcium and c) milliosmoles  NOTE: no nee…
  • Answer: 8.45. Please explain how to get this answer.
  • Answer: 1.35 * 10 -6 M. Please explain how to get this answer.. 15. (20 pts) What is [Ca"] at the equivalence point when 50.00 mL of 0.050 M Cat solution buffered at PH 10.00 is titrated with 0.1…
  • Answer: 1.16 * 10 -5 M. Please explain how to get this answer.
  • Activity 1- Mapping of Electric Fields Direction: Draw the mappings of electric fields using lines of forces for different charge configurations. Label the following with the correct charge. Use inter…
  • A 43.67 mL sample of a 0.085 F solution of methylamine (CH3NH2) is titrated with 0.0912 M HCl. Calculate the pH after adding 35.17 mL of the HCl solution. (for CH3NH3+ the pKa = 10.632) Answer: 9.826,…
  • Consider the following system at equilibrium: When a chemical reaction is at equilibrium, Q (the reaction quotient) is equal to K (the equilibrium constant). If a stress is applied to the P(aq) + Q(aq…
  • N2O5(g) decomposes according to the following reaction: The experimentally observed rate law is: ÂR = k[N2O5]
  • Identify the proper form of the equilibrium-constant expression for the equation N2(g) + 02 (g) : 2N0(g) b ViewAvailable Hint(s) O K : [131%] O K : $133)] 0 K : [ng3322] O K 2 [3312] V PartB The equil…
  • NaOH is added to an acetic acid/acetate buffer until the pH is adjusted to 4.74. Calculate the fraction of acetate ( α A c − ​ ) in this solution. (K a for acetic acid is 1.8 * 10 -5 ). Answer: 0…
  • Which of the following pairs of elements can form ionic compounds? A. sulfur and chlorine B. cesium and bromine C. bromine and sodium D. barium and oxygen E. sodium and calcium F. nickel and fluorine …
  • . Choose the atom(s) that are chiral centers in this alkane. A) 1 B) 2 3 4 C) 3 2 D) 4 E) 3 and 4 +
  • Strand iii. Analyse and evaluate the compound given below. a. Explain why BeCl2 is a covalent compound and not an ionic compound. b. State what result would you expect if BeClz is used in this experim…
  • Hello Thank You. 3. Using your linear fit from the calibration curve, estimate the concentration of a Ni* solution that has an absorbance of 0.50. Show all of your work and appropriate units on your f…
  • Molar Conversions Name: Problem Set 35 Chemistry Cruickshanks 1.) Calculate the molar mass of the following: A. NaCl E. SF40 F. Barium G. TI 1 B. NaC2H302 C. Fe3(PO4)2 D. H. Ti CF4 Convert the followi…
  • Write a formula for the compound that forms between sodium and each polyatomic ion: i) formate ii) carbonate iii) phosphite iv) hydrogen carbonate A i) HCOONa, ii) NazCO3 iii) NazPO3 iv) NaHCO3 B i) H…
  • Fill a syringe with 10 ml of 25% IPA solution, attach the sep-pack, and push the solution through slowly to remove and collect the 2nd color in a 2nd test tube QUESTION 6 10 points Save Answer On a pa…
  • Determine the molarity of a solution of hydrochloric acid if the moles of HCl is 0.35 moles in a 250 mL solution? Â need fast need solution will rate answer
  • Ely Buendia had to take a sip of mineral water before singing for a Candidate Rally. A 500.0 g sample of the mineral water is said to contain 0.18 g of bicarbonate (HCO3). HCO3 helps in regulating the…
  • b : 0: : 0:0 Br : 0in A. What is the formal charge on the bromine (Br) atom? B. What is the formal charge of each of the oxygen (O) atoms labeled a, b, and c? A Br = 0; a = -1; b =-1; c = 0 B Br = +1;…
  • Julia wanted to make a light syrup for her wedding cake so that it would not dry out before icing. What is the mass percent of the syrup solution with 350 g of sugar in 500 g of water? Â need fast ne…
  • How much heat is required to convert 258 g of liquid water at 31.5 °C into steam at 122.3 °C? Heat of Vaporization = 40.79 𝑘𝐽/𝑚𝑜𝑙 Specific Heat of Liquid Water = 4.18 𝐽/(𝑔∙°?…
  • You are stranded in a frozen wasteland and you are running out of water to drink. However, you are able to get some materials for fire and a pot to boil water in. How much energy (heat) is required to…
  • < Prev Next > Draw the Lewis structure of PHF2 so that the central P atom obeys the octet rule. Based on the drawing, answer the following: The central P atom has unshared pairs (lone pairs). Th…
  • Iron and water react to form Iron(III) oxide and hydrogen, like this: 2 Fe(s)+ 3 H,O(9)-Fe203(s) + 3 H2(9) At a certain temperature, a chemist finds that a 9.0 L reaction vessel containing a mixture o…
  • need fast, will rate the answer. For the next 4 questions, refer to the diagram below: 73 Liquid Solid C Pressure [atm) 5.2 Gas 197.5 216.6 304.25 Temperature (K) What is the phase of this substance a…
  • Consider the following chemical equilibrium: NH SH (s) – HS (g) +NH, (8) Now write an equation below that shows how to calculate K from K,, for this reaction at an absolute temperature 7. You can assu…
  • Write the concentration equilibrium constant expression for this reaction. 2 Cul(s)+ I,(aq)-2 Cu (aq)+41 (aq) B X U
  • . Chemistry 30: Unit D Assignment Book Use the following information to answer the next question. Dinitrogen tetraoxide was used as one of the rocket fuels on the lunar landers of the Apollo mission…
  • Can you help me. ame: ID: A PART IV For the following questions, use the guidelines below to determine which of the following combinations of solutions will produce a precipitate. If no precipitate wi…
  • Could you please help to solve the following questions in detail regarding Molecular Fluorescence Spectrophotometry? Thank you.. Question 5 Quinine in a 1.664 g tablet was dissolved in sufficient 0.10…
  • Could you please help to solve the following questions in detail regarding Molecular Fluorescence Spectrophotometry? Thank you.. Molecular Fluorescence Spectrophotometry Tutorial Question Set 2 Questi…
  • Could you please help to solve the following questions in detail regarding UV-Visible Spectrophotometry?. Question 5 The figure below shows a calibration curve obtained by UV-Visible spectrophotometry…
  • Could you please help to solve the following questions in detail regarding UV-Visible Spectrophotometry?. UV-Visible Spectrophotometry Tutorial Question Set 1 Question 1 A wastewater sample was collec…
  • Some chemicals, like hydrogen peroxide, are prone to decomposition by photocatalysis. How can you prevent photocatalysis? PLEASE WRITE IT IN ESSAY (ESSAY THANKS)
  • Cro 4 Cr20 2 mead. Fill in the blanks on this table of Other Common Polyatomic lons NAME FORMULA FeCr207 NazOz HBO calcium cyanide ammonium oxalate silver(1) permanganate mercury(1) chloride mercury(I…
  • lead(IV) selenide NHANO3 ete copper(II) nitride Mn(CIO 3)2 9. Practise with Polyatomic lons with "-ite" Ending The only difference in formula for those with "-ite" endings as oppos…
  • I have done question 1 of the procedure (graph on left). I need help on question 2 and 3 and the analysis. Thank you. Thought Lab 17.1 Analyzing a Weak Acid-Strong Base Titration A student used a phi …
  • Information for following question: 2 and 3: 4 and 5: 6:. Which is the limiting reagent? R O O O NaOH O OH R 3 CH3OH (catalyst) + O 3 HaCO R + OH OH R Triglyceride Alcohol Biodiesel Glycerol (oil) Sel…
  • 2 Fe(HCO 3)2 3 Pb(HPO4) 2 XXXXXXXXXXXXXXXXX 4 AgHSO 5 Bi(H2PO3) 3 XXXXXXXXXXXXXXXXX 6 barium hydrogen phosphate XXXXXXXXXXXXXXXXX magnesium hydrogen sulfite 8 XXXXXXXXXXXXXXXXX aluminum hydrogen…
  • H2SO4 HC2H302 phosphorous acid HNO 2 chlorous acid sulfurous acid HCIO4 hypochlorous acid HBr chloric acid H2SO3 phosphoric acid HzSe nitric acid H3PO acetic acid HOH hydrotelluric acid 12. Nomenclatu…
  • . 1. The small repeating units that make up proteins are called a) Fatty acids b) Amino acids C) Monosaccharides d) Ethylene 2. The sequence of amino acids in a polypeptide is called the prote…
  • For sulfate, with a charge of 2-, you would have to add two H*. Generally the hydrogen is placed at the front of the formula (H2504). For phosphate, you would have to add three H’, and the acid has th…
  • Rep # intensity cps baseline intensity cps C intensity (cps) 1 2.04 1.09 40.21 2 2.54 1.11 42.21 3 2.76 1.13 44.53 4 3.03 1.20 50.00 5 3.14 1.23 51.22 Contains 12ppm Calculate the S/N and LOD for the …
  • What is true about intermolecular forces? * Â a. They are strong bonds that form between atoms of molecules. Â Â b. Substances can form more than one but one will predominate. Â Â c. They are str…
  • How to find the available energy. Use the following information to answer the next question. In organisms, the reaction of sucrose and oxygen produces carbon dioxide, water, and energy. The energy ava…
  • ablasles SO 2 4 SO 2- nitrite phosphite acetate chlorite Na3PO4 K2SO3 Pb(OH) 2 CoCIO2 Ca(NO 3) 2 iron(Ill) carbonate copper(1) sulfite cesium nitrite aluminum chlorate 10. Practise on the Nomenclature…
  • When we lose yet another oxygen, there is no oxygen left and we have the simple monatomic ion with the -ide ending. Returning to chlorate as the base, if we add one extra oxygen, the name picks up the…
  • need asap please and thank you!. At a certain temperature this reaction follows second-order kinetics with a rate constant of 1.29M ‘s 1: 2N205 (8) – 2N204 (8) + 02 (8) Suppose a vessel contains N20, …
  • . 1. Calculate the percentage by mass of each element in the following compounds. a. Ethanol. CszDH b. Sodium sulfate, N32304 2. Aspirin has the molecular formula CgHgD4. What is the ‘ii. (3 in aspi…
  • . Ba(CIO3)2 calcium acetate 7. Fill in the blanks by writing the formulae or naming the compound with compounds with the "Basic Eight" Polyatomic lons with Cations of Variable Charges: NAM…
  • need asap please will leave thumbs up. At a certain temperature this reaction follows second-order kinetics with a rate constant of 39.6M-1.5 1: 2NH, (g) – N2 (g) + 3H2 (g) Suppose a vessel contains N…
  • Stoichiometry Calculations 1. Interpret the following balanced chemical equation in term of particles and mass a. Mg + 2HCI – MgCl2+ H2 b. 2Al + 3 CUSO. – Alz(SO_); + 3 Cu
  • . Information Work through the virtual investigation Boyle’s Law Gizmo in Unit B, Section 1 Lesson 4. Flag question Use the information provided and the data collected to respond to the following qu…
  • . VI. REFLECTION Complete the sentence below 1. I have learned that 2. I want to know more about 3. I wish to ask my teacher about 10 RO_General Chemistry?_ Grade 11/12 Q1_ LP 3. IV. RUBRICS FOR SCO…
  • calculate the normality of sulfuric acid solution using 22.15 ml of it. the volume of nao used in the standardization was 20.75 ml and its normality was 1.1055
  • (6 pts) Identify and write three (3) new, high-quality scientific questions related to light emission from a firework. Questions must be focused on the molecular-level behavior of the chemical compone…
  • . Students will be able use Avogadro’s number to convert between particles of "A" and "B" Particle Converting Particles "A" – Particles "B" Write the mole rat…
  • . Information For each of the following sentences, select the word that completes the statement correctly. Flag question Question 1 The Law of Combining Volumes states that, at a constant temperatur…
  • Write a conclusion statement about the magnetic field strengths that were calculated for each current loop. Is the value for the mag- netic field strengths a constant through the experiment? Why? How …
  • "The phase diagram for the Ag/Cu system is shown * below. 1 100 Liquid 2 3 Identify each numbered area by the phase or phases they represent. (b) A sample 70% Ca (by weight) is liquified and mixe…
  • [References] Use the References to access important values if needed for this question. Write a balanced equation for the decomposition reaction described, using the smallest possible integer coeffici…
  • . (III) In class, we discussed 3Heg and “Ari; molecules. Assume that the interatomic potential is finite and harmonic (Figural). its depth is the dissociation energy. The dissociation energies of…
  • [References] Use the References to access important values if needed for this question. Write a balanced equation for the combination reaction described, using the smallest possible integer coefficien…
  • How many cycles per minute does it usually take for a disintegration test using a basket-rack assembly machine? Â CHOOSE THE RIGHT ANSWERS Â 1.How many cycles per minute does it usually take for a…
  • lustration on the left repr x + genow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] Use the References to access important values if needed for this question. Wr…
  • DZL Homepage – LSCS OWLV2 | Online teaching and le x 5) The illustration on the left repre X now.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] Use the References…
  • X D2L Homepage – LSCS X OWLV2 | Online teaching and le x The illustration agenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] Use the References to access impor…
  • This graphing calculator exercise that asks you to determine the formula of any straight- chain hydrocarbon, given the number of carbon atoms and the number of double bonds in the compound. Download t…
  • ogin x D2L Homepage – LSCS X OWLV2 | Online teaching and le X G The illustration on the left repr x + engagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] ot …
  • [References] Use the References to access important values if needed for this questio Does a reaction occur when aqueous solutions of iron (III) chloride and sodium hydroxide are combined? Oyes O no I…
  • Use the References to access important values if needed for this que Does a reaction occur when aqueous solutions of potassium chloride and silver(I) nitrate are combined? Oyes O no If a reaction does…
  • [References] Use the References to access important values if needed for this question. Does a reaction occur when aqueous solutions of ammonium chloride and iron (II) nitrate are combined? O yes O no…
  • [References] Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. The following molecular equation represents the reaction that occurs when aqueous solutions of silver…
  • Based upon the color , in which direction does the equilibrium shift ? The equilibrium shifts towards the left.
  • calculate a.the original mass of the hydrate, b. the mass of water lost upon heating, and c the experimental percent water in the hydrate
  • Consider this reaction: NH 4 OH(aq) —> NH 3 (aq)+H 2 O(aq) At a certain temperature it obeys this rate law. rate:=(9.02 M^ -1 * s^ -1 )[NH 4 OH]^ 2 Suppose a vessel contains at a concentration of…
  • . Total Answer all questions and show all work for full marks. 63 ® 1. Draw electron dot diagrams for each of the following entities. a. phosphorus atom b. boron atom c. strontium ion . d. sul?…
  • cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take 10:18 [References] Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. 1 pt Write…
  • Classify each of the compounds as soluble or not soluble: V iron (III) phosphate V barium sulfide V potassium sulfate Submit Answer Try Another Version 2 item attempts remaining
  • Classify each of the compounds as soluble or not soluble: V iron (III) phosphate V barium sulfide potassium sulfate Submit Answer Try Another Version 2 item attempts remaining
  • 7 (References] pt Use the References to access important values if needed for this question. pt pt When the following molecular equation is balanced using the smallest possible integer coefficients, t…
  • [References] Use the References to access important values if needed for this question. When the following molecular equation is balanced using the smallest possible integer coefficients, the values o…
  • :02 [References] 1 pt Use the References to access important values if needed for this question. 1 pt Consider the following unbalanced particulate representation of a chemical equation: 1 pt 1 pt I =…
  • Compare (write some comments down) the polarity of the bonds in ammonia, NH3, to phosphorus trihydride, PH3. Include any polarity by using dipole- moment arrow. Indicate whether or not each molecule, …
  • [References] Use the References to access important values if needed for this question. Visited Decide if each statement is true or false for the transformation pictured at the particulate level in th…
  • [References] Use the References to access important values if needed for this question. The illustration on the left represents a mixture of N2 (blue) molecules and O2 (red) molecules. If these were t…
  • Just find any article that relates radiation to human health or environmental health, then after studying said article, respond with a summary of the article, including a reference and a personal resp…
  • Hello please help me on answering this I will the reference video on the comment section thankyou please watch it. What are the importance of knowing sugar solubility? What are the known reagents used…
  • I have done number 1 of the procedure. I need help on 2 and 3 and the analysis. Thank you. Thought Lab | 17.1| Analyzing a Weak Acid-Strong Base Titration A student used a PH meter to collect data for…
  • Which of the following pharmaceutical agents correspond to the assay methods belowÂ. Niacin Choose a match Vitamin K Fluorometry Penicillin O High-Precision Liquid Chromatography Barbiturates O Gas C…
  • A piston has an external pressure of 13.0 atmatm. How much work has been done in joules if the cylinder goes from a volume of 0.160 liters to 0.560 liters?
  • Unit 4 – CHEM-1 ssignment/takeCovalentActivity.do?locator=assignment-take [Review Topics] [References] Use the References to access important values if needed for this question. When the following mol…
  • i’m confused on how to solve this. 10.) Silver \(Ag3*) and oxygen (O2) react to produce
  • Na and Mg each form compounds with F2 and O2. Out of these four compounds, which would have the strongest lattice energy? What are the periodic trends in lattice energy?
  • online teaching and le what is the formula for sulfur c nment/takeCovalentActivity.do?locator=assignment-take [Review Topics] [References] Use the References to access important values if needed for t…
  • A 23.92Âg sample of a compound contains 7.63Âg of potassium, K, 6.92Âg of chlorine, Cl, and oxygen, O. Calculate the empiricalÂformula.
  • What is the molecular formula of a compound with the empirical formula CH2O and a formula mass ofÂ150.13Âamu?
  • For the following reaction, 151 grams of silver nitrate are allowed to react with 24.0 grams of copper . silver nitrate(aq) + copper(s) – copper(II) nitrate(aq) + silver.(s) What is the maximum amount…
  • What is the molecular formula of a compound with the empirical formula SF5 and a formula mass ofÂ254.1Âamu?
  • Balance each equation then calculate AH. All H, is in kJ/mole. Then determine if the reaction is endo or exothermic Al+ NH CIO – Al,O; + AlCl, + NO + H,O Al = 0.0 NH,CIO4 = -295 Al,Of = -1676 AlCl = -…
  • Precal hw Â. 7) Determine the number of protons and electrons In each of the following lons. Express your answers as integers. Enter your answers separated by a comma. Ni^2+ = 0^2 – =_ Bri.= Ca^2+=…
  • Light Source Photo/Drawing/Description of the spectrum Wavelength range of the spectrum Sun  400-800 nm Fluorescent  400-700 nm Incandescent (Yellow)  300 nm LED Red  630 – 660 nm LED Blu…
  • A beaker contains 34.6ÂmL of carbonÂtetrachloride (CCl4, density is 1.59Âg/mL). Determine how many molecules of carbonÂtetrachloride are in theÂbeaker.
  • “Synthesis gas” is a mixture of carbon monoxide and water vapor. At high temperature synthesis gas will form carbon dioxide and hydrogen, and in fact this reaction is one of the ways hydrogen is ma…
  • Review Topics] [References] Use the References to access important values if needed for this question. Under certain conditions, the substances diphosphorus pentoxide and water combine to form phospho…
  • . Provide the correct IUPAC name for the compound shown here. Br CH2 CH3
  • How many aspirin molecules are in 80.Âmg of aspirin? The molecular formula for aspirin isÂC9H8O4.
  • Balance each equation then calculate AH. All H, is in kJ/mole. Then determine if the reaction is endo or exothermic. NH3 + 0, – NO + H,O NH; = -46.0 O, = 0.0 NO = 90.0 H,O =-241.82
  • Choose the correct reagents/ conditions to perform the following reactions A OCH3 C 1. For Reaction [Select ] 2. For Reaction [Select ] 3. For Reaction CH3OH/heat
  • Copy the link and watch the video and (Take Notes)Write in a paper. THIS WILL SERVE AS YOUR REVIEWER Â https://drive.google.com/file/d/1ZyY7Gf-wJJUO7fQzy1Q44HveEmKaZHpk/view
  • n/takeAssignment/takeCovalentActivity.do?locator=assignment-take [Review Topics] (References] M Use the References to access important values if needed for this question. M Under certain conditions, t…
  • Enthalpy Balance each equation then calculate AH. All H, is in kJ/mole. Then determine if the reaction is endo or exothermic. BH + 02 -+ BO; + HO B,H = 45.0 O, =0.0 B,O, = -125.0 H,O =-241.82
  • The rust that appears on steel surfaces is iron(III) oxide. If the rust found spread over the surfaces of a steel carÂbody contains a total of 1.471×10^23 oxygen atoms, how many grams of rust are pr…
  • i need help with this please. WRITING STRUCTURES 9. Explain the similarities differences between saturated and unsaturated Hydrocarbons in your own words. 10. Compare three properties of alkanes versu…
  • Molarity Y 0.125 , Molarity A 0.0934 , %Z 3.33 Available glassware Beakers- 30, 50, 100, 250, 400, 600 (all ML) Conical flask- 125, 250, 500 (all mL) Graduate cylinders- 10, 25, 100 (all mL) Volumetri…
  • A sample of aluminum foil contains 5.20×1023Âatoms. What is the mass of theÂfoil?
  • Copy the link and watch the video and (Take Notes)Write in paper  https://drive.google.com/file/d/14A5ouUhKYA5XBmxmf9l2VYXHppIl17Jg/view
  • Which solution has more solutes, a 1.0 m solution of glucose or a 1.0 m solution of NaCl? (Hint: NaCl ionizes)
  • Enthalpy Balance each equation then calculate AH. All H, is in kJ/mole. Then determine if the reaction is endo or exothermic. Mg(OH)2 – Mg0 + HO Mg(OH)2 = -924.7 Mgo = -601.8 H,O =-241.82
  • If a cleaning agent contains 2.35ÂmolÂNH3, how many grams of NH3 are in the cleaningÂagent?
  • A sample of Ca ( s ) is added to water to make a 150. mL solution. Thymol blue indicator is added to the solution. The solution is then titrated with 1.00 M HCl. The initial reading of the burette is …
  • Balance each equation then calculate AH. All H, is in kJ/mole. Then determine if the reaction is endo or exothermic. SiCl + HO – SiO, + HCI SiCl, = -640.1 H,O =-241.82 SiO, = -910.9 HCI = -92.30
  • GCH5350 2022 Spring Problem Set 3 (due by the beginning of 2/22 lecture) Problem 1: You mixed 10 mg quartz (SiOz) and 100 mg water (H2O) in a sealed capsule and heated up at 300 C to reach an oxygen i…
  • use oxidation number change method not half-reaction method. use oxidation number change method Steps is balancing redox equation: 1. Assign oxidation numbers to all the elements. 2. Determine the fol…
  • Les To preview image click here & For the substituted cyclohexane structure provided a) Draw the chair conformation that can undergo E2 elimination b) Draw the transition state for E2 elimination …
  • Consider the following reaction: 2 A (g) + B (g) ⇌ 2 C (g) K c = 6.2 x 10 2 at 25 o C What is the value of K p at this temperature?
  • . Provide the correct IUPAC name for the compound shown here. Br CH3
  • Balance each equation then calculate AH. All H, is in kJ/mole. Then determine if the reaction is endo or exothermic. Fe,Of + HCI + FeCl; + H,O Fe,O, = -822.16 HCI =-92.30 FeCl; = 400.0 HO =-241.82
  • While ethanol CH3CH2OH is produced naturally by fermentation, e.g. in beer- and wine-making, industrially it is synthesized by reacting ethylene CH2CH2 with water vapor at elevated temperatures. A che…
  • i need help with this please. Hydrocarbons Practice Quiz Part I: Name the following hydrocarbons using the IUPAC rules learned in class: 1. H CH3 H H,C-C-C-C-CEC-H I CH2 H H CH3 2. H HH H H-C=C-C-C_ -…
  • i need help with this please. CH3 I CH2 CH3 CH3H CH2 H&C-C-C=C-C-C-CH3 CH&H H H Part II: Provide the molecular and structural formulas for the following:: 5. 3,4-diethyl-5,5-dimethylheptane 6….
  • Balance each equation then calculate AH. All H is in kJ/mole. Then determine if the reaction is endo or exothermic. CHA + Clz – CCIA + HCI CHA = -74.8 CI, = 0.0 CCl, = -106.7 HCI = -92.30
  • 3 and 4. 5 and 6. 7. 9. 10 and 11. 12.. You added 5.00 ml of 0.40 M NaOH in methanol to 20.00 mL of cooking oil. Calculate the number of moles of vegetable oil, methanol, and NaOH that are initi…
    • Give a curved arrow mechanism for the following SN1 reaction. Where appropriate, label the Lewis acid and Lewis base in each step, and whether they are also Bronsted acids and bases. b) Draw a reac…
  • EXPERIMENT 2: Calculate the number of moles of oxygen in the copper oxide . The molar mass of oxygen is 16.00 g/mol . 0.10012 mol O Empirical Formula of Copper Oxide_Essay8_Copper to Oxygen Mole Ra…
  • . Write a detailed set of instruction for making a 100 mL solution of 16 M NaOH. Rank the steps from first step to last step in order going from left to right Reset Help Add distilled water to the m…
  • [Review Topics] [References] Use the References to access important values if needed for this question. Under certain conditions, the substances sulfur dioxide and oxygen combine to form sulfur trioxi…
  • . 1. Consider the ether shown below. Draw the full mechanism for the alpha cleavage that leads to the most intense peak on the spectrum. Explain why you selected the fragment you did. 2. Consider th…
  • . The enthalpy of sublimation of 12(s) at 298.15 K is 62.438 kJ/mole and the vapor pressure is 0.30844 torr. The heat capacity of the gas is Com = 36.90 J Kmole and the heat capacity of the solid is…
  • A new container is prepared with [A] = [B] = 0.300M, calculate the final concentration of A if Kc = 4.60*10^6 Â 2A + B yields C
  • Pages File Edit Insert Format Arrange View Share Window Help ()) 4 9 8 Sun Feb 27 9:55 PM Naming Compounds, Writing Formulas and Lewis StructureSU21 – Edited 151% v + A 19 View Zoom Add Page Insert Ta…
  • Please solve these calculations with accurate units: a. Solve for c  0.267= 1mL(mg -1 *cm -1 ) * c * 0.294 cm   b. Solve for c  0.267= 43,824 M -1 cm -1 * c * 0.294 cm
  • Nitrogen dioxide is one of the many oxides of nitrogen (often collectively called “NOx”) that are of interest to atmospheric chemistry. It can react with itself to form another form of NOx, dinitrogen…
  • given the following information two trials are confucted trial one: – mass of NaHCO3(g) = 4.89 Volume of water (mL)=100 Initial temperature of water (degrees celcius)=19.8 Final temperature of water (…
  • Please help. Below is a link to the virtual lab. I need a step-by-step (ex. what liquid to take and how much to pour into new glass container.) Âprocedure and pics if you can on how to create the abo…
  • don’t round till end and round to 3 decimal place
  • given the following information two trials are conducted trial one: – mass of NaHCO3=2.58 – Volume of vinegar(mL)=75 Initial temperature of water (degrees celcius)=19.5 Final temperature of water (deg…
  • don’t round till end and round to 3 decimal place. What is the specific heat capacity of a substance of mass 153.8 g that increases in temperature from 21.8 .C to 25.8 *C after absorbing 1.01…
  • Question 16 1 Point Zahara Noor wants to create a presentation of different molecules that helped change the world, but she needs help in naming them, so that anyone is able to understand the molecule…
  • given the following information two trials are confucted trial one: – mass of NaHCO3(g) -Volume of water (mL)=100 Initial temperature of water (degrees celcius)=19.8 Final temperature of water (degree…
  • How many moles of carbon will I need to produce 0.769 moles of iron? Enter your answer as a decimal using the correct number of significant figures. Note: A mole is a measuring unit just like any othe…
  • Which is not a conjugate acid-base pair? Keywords: proton, Bronsted-Lowry Acid-Base Definition, Bronsted-Lowry acid, Bronsted-Lowry base, conjugate acid-base pairs A) H2O, OH- B)H2O, H3O+ c)NO3-…
  • I will need how many molecules of nitric acid to produce 87 molecules of zinc nitrate? Enter your answer as a whole number using the correct number of significant figures.
  • given the following information two trials are conducted trial one: – mass of CaCl2(g) = 4.99 -Volume of water (mL)=100 Initial temperature of water (degrees celcius)=20.2 Final temperature of water (…
  • please pay attention to sig figs thank you :). Consider this reaction: CICH, CH, CI (g) – CH2 CHCI (g) + HCI (g) At a certain temperature it obeys this rate law. rate = (16.5 M ‘s ‘) CICH, CH, CI] olo…
  • just solve the last question and the degrees of freedom student t is 30 Â to solve you need to find s pooled and then t calc and see if it is greater than or less than t table Â. 27 28 Ther…
  • given the following information, a) what is the energy required to heat the water bath? b) what is the experimental specific heat capacity of water using the data? (in Jg^-1K^-1)? c) what is the absol…
  • how to find PPM of CaCO3. (1) ppm CaCO: (2) Ppm CaCO3 3 Ppm CaCO3
  • chem hw help please. QUESTION 5 How many grams solid precipitate will form if 85.23 grams of MgCl2 react with excess AgNO3 ?
  • really need help on hw please. QUESTION 4 How many grams of hydrofluoric acid are formed when 188.1 grams of hydrogen (H2) react with 188.1 grams of fluorine (F2): H2 + F2 – 2HF
  • Is the resolution between peaks 4 and 5 sufficient for quantitative studies if they are needed? How about the resolution between peaks 2 and 3? Peaks 6 and 7? ÂCan these compounds be successfully q…
  • For each of the following pairs, predict which substance possesses the larger entropy per mole: (a) 1 mol of O2(8) at 300 °C, 0.01 atm, or 1 mol of O3(g) at 300°C, 0.01 atm; Â(b) 1 mol of H20(g) …
    • Compounds containing the ion sodium (Na ) are always b. Compounds containing the anion nitrate (NO, ) are always c. Compounds containing the ion carbonate are usually Exceptions include and
  • . Dougherty Valley HS Chemistry Bonding and Structure – Molecular Geometry Activity Molecular AXE Electronic Lewis Structure Bond Angle 3D Sketch Formula Formula Geometry SF 6 # bonded atoms on A St…
  • please pay attention to significant figures thank you :). Using an integrated rate law for a first-order reaction At a certain temperature the rate of this reaction is first order in NH,OH with a rate…
  • Con someone help me with this. Thank you. FORUM DESCRIPTION Post your unknown acid name as well as the titer (mg of acid that will consume 1 mL of NaOH) of NaOH for your acid (Part A) to the Discussio…
  • 4 2. What is conserved in the reaction shown below? H2(g) + Cl, (g) – 2HCI(g) a. mass only b. mass and moles only C . mass, moles, and molecules only d. mass, moles, molecules, and volume In any chemi…
  • . Dougherty Valley HS Chemistry Bonding and Structure – Molecular Geometry Activity Worksheet #10 Name: Period: Seat#: Purpose: To construct a series of compounds using the VSEPR model and to use yo…
  • please watch out for sig figs thank you. At a certain temperature this reaction follows second-order kinetics with a rate constant of 8.56M-1.$ 1: 2C1205 (g) – 2C12 (g) + 502 (8) Suppose a vessel cont…
  • What is the heat of sublimation of carbon dioxide if 6.07 grams requires 3.48 kj of energy
  • need help figuring out acids,bases & conjugates. In the below chemical reaction, which element is acting as the conjugate base in the forward reaction? HSO 4-1 + HCO-1 –> SO4-2 + H2CO3 O H2CO3…
  • hw help please. QUESTION 3 Given the following reaction: 204H10 + 1302 8CO2 + 10H20 If 33.6 grams of oxygen reacts with butane ( C4H10 ) in excess, how many grams of water will form?
  • I need help with this question please. QUESTION 2 How many molecules are in 95.43 grams of the theoretical acid borofuric acid, H2B302? remember units and sig figs. If your answer is a very large numb…
  • Logins | Lee College OneLogin X Bb General Course Documents/lin x 101 Chem101 Course Hero app. 101edu.co Question 6 of 14 Calculate the theoretical yield in grams All, from the complete reaction of 18…
  • How do I calculate the molarity of the EDTA?. Standardization Titration for EDTA Fill your burette with the EDTA solution. Pipet a 25 mL aliquot of standard calcium solution into a 250 mL Erlenmeyer f…
  • Consider the redox reaction: Fe304 (s) + 4H2(g) – 3Fe(s) + 4H20(1) How many electrons are transfered in the reaction? Iron is being (Reduced or oxidized) Hydrogen is being (Reduced or oxidized)
  • Determine the mass in grams of C,H,. that are required to completely react to produce 8.70 mol of CO, according to the following combustion reaction: 2 CH(9) + 13 0,(9) – 8 CO,(g) + 10 H,O(g) X STARTI…
  • a compound of sodium and chlorine was found to be in the ratio of 1.54g of chlorine to 1.00g of sodium. How much sodium would you need to completely react with 45.0g of chlorine
  • . Question 1 To understand the main properties of gases is important. For each of the following sentences, select the word that Not yet completes correctly the statement about gases. answered Marked…
  • Question 14 of 14 According to the balanced reaction below, calculate the quantity of moles of NO, gas that forms when 5.20 x 103 mol of NO gas completely reacts: 2 NO.(9) – 4 NO,(9) + 0,(9) X STARTIN…
  • please be careful with significant figures thank you. Using an integrated rate law for a first-order… At a certain temperature this reaction follows first-order kinetics with a rate constant of 0.00…
  • how do i find the molarity of my standard calcium solution?. Standard Calcium Solution Accurately weigh 0.5 g (no need to match 0.5000g exactly, but four decimal places should be kept for the mass dat…
  • (2) If you said energy was released or absorbed, calculate how much energy is released or absorbed. kJ/mol Give your answer in both kJ/mol and MeV. Be sure each of your answer entries has the correct …
  • Â 2. Â Â Â 3. Â Â 4. Â Â Â. Classify each of these chemical compounds: compound type of compound (check all that apply) molecular Ionic Pb SO O organic O) Inorganic hydrocarbon O molecular…
  • “Synthesis gas” is a mixture of carbon monoxide and water vapor. At high temperature synthesis gas will form carbon dioxide and hydrogen, and in fact this reaction is one of the ways hydrogen is made …
  • please answer this asap. Indium-116 is radioactive and has a half life of 14.10 seconds. What percentage of a sample would be left after 65.8 seconds? Found your answer to 2 significant digits.
  • https://www.covid19treatmentguidelines.nih.gov/therapies/antiviral-therapy/remdesivir/ Â is the internet site attach above considered high quality of site? Explain.
  • QUESTION 9 In Part B, we use a C18 Sep-Pak column. This column is best described as what type of substance? hydrophilic semipolar O ionic nonpolar O polar QUESTION
  • when steel wool burns in the air the following reaction occurs: 4fe+3o2=2fe2o3. what volume of oxygen measured in 740 mmhg and 25°C is required to react with 101 g of iron?
  • Which is not a conjugate acid-base pair? Keywords: proton, Bronsted-Lowry Acid-Base Definition, Bronsted-Lowry acid, Bronsted-Lowry base, conjugate acid-base pairs  Use three keywords in the e…
  • EXPERIMENT Part I Constructing a calibration table and curve Table 3. Absorbances of the calibration (standard) solutions Wavelength, nm: Test tube # Concentration of Cuz ions, M Absorbance Test tube …
  • . Steam at 200 deg. C and with an entropy of 5.6105 kJ/kg-K expands isothermally to 0.515 MPa. For 5kg, find: a. AS, AH, AU b. Q c. Wn and Ws d. draw the p-v T-s diagram with A KE = 0
  • Atomic sulfur, S, has a ground electronic configuration that gives rise to the levels 3 P 2,1,0 , 1 D 2 Âand 1 S 0 .ÂÂPredict which of these levels is lowest in energy.  a. 3 P 2 b. 1 S …
  • Discussion 1: Discuss the formation of bond between MAGNESIUM and NITROGEN. (Use these keywords in your discussion: CATIONS, ANIONS, IONIC).
  • Based on the structure of its conjugate base, which acid has the lowest pKa? A- CH3COOH B- ClCH2COOH C- BrCH2COOH D- ClCH2CH2COOH Keywords:Â pK a , acid strength, dissociation, conjugate base, elemen…
  • Use the calibration curve guide from reading materials to complete the following. You are given a sample of potassium sulfate solution in water. It is known that the concentration of this solution is …
  • What are the main differences and similarities in how we name ionic compounds and molecular compounds (Use at least two examples in your discussion).
  • What kind of change occurs when NaCl is formed from Na and Cl2? Hint: Examine the images of elemental sodium and elemental chlorine shown in your textbook.
  • Determine the pH of the following buffer solution that is a mixture of 50.0 mL of 0.144 M acetic acid and 50.0 mL of 0.137 M sodium acetate. Ka of acetic acid is 1.8 x 10-5. 3. Determine the pH of …
  • Question 3 (1 point) Saved If NaCl was placed in a beaker of water and dissolved, what kind of change would occur? A) physical change O B) disappearing change O C) chemical change chat D) dissolving c…
  • Why are we doing this experiment? What will we learn from it? This should be a brief statement
  • I need step by step please.. 25. The following reaction begins with a partial pressure of 0.18 atm. PCls (g) – PCl3 (g) + Cl2 (8) Kp = 3.4 x 10-4 Calculate the partial pressure of PCIs at equilibrium….
  • need help figuring out acids, bases, and conjugates.
  • If 27.00 mL of 0.500 M nitric acid is required to neutralize 12.50 mL of calcium hydroxide, what is the molarity of the base? 2. If 27.00 mL of 0.500 M nitric acid is required to neutralize 12.50 m…
  • Helpppppppo Â. Two objects are brought into contact. Object #1 has mass 1.01 kg, specific heat capacity 0.63 J g .C" and initial temperature 53.2 .C. Object #2 has mass 81.4 g, specific heat cap…
  • QUESTION 3 In the following reaction, how many grams of water are produced upon the reaction of 42.46 grams of C6H14? 2 C6H14 + 1902 -> 12 CO2 + 14 H20
  • Consider the redox reaction: Fe304 (s) + 4H2(9) – 3Fe(s) + 4H20(1) How many electrons are transfered in the reaction? Iron is being (Reduced or oxidized) Hydrogen is being . (Reduced or oxidized)
  • How many grams of hydrofluoric acid are formed when 127.79 grams of hydrogen (H2) react with 127.79 grams of fluorine (F2): H2 + F2 – 2HF
  • ¿Cuáles son los puntos clave en la eficiencia de una ruta metabólica en relación con una buena o mala alimentación?
  • Please help me answer this question.. dryness and skin outbreaks. Question 3 (1 point) How many times more acidic is vinegar (pH = 2) than coffee (pH = 5)? (1 mark) Paragraph v BIUA Ev + …
  • How many moles of Hâ‚‚O can be formed from 1.97 × 10²³ molecules of NH₃ from the following equation? 4 NH₃(g) + 5 Oâ‚‚(g) → 4 NO(g) + 6 Hâ‚‚O(g)
  • need help figuring out acids, bases and conjugates.Â. In the below chemical reaction, which element is acting as the conjugate base in the forward reaction? OH – 1 + HCO3-1 –> H20 + CO3-2 O HCO3 …
  • A prospector panned some “yellow sand” from a stream. The sand weighed 165 g and had a volume of 33.0 cm 3 . Was the sand pure gold or “fool’s gold” (iron pyrite)? (The density of gold is 19.3 g/c…
  • One powder contains 40% drug A and 20% drug B and the other contains 50% drug A and 10% drug B. How much of EACH powder (in mg) must be added to make a capsule that contains 210 mg of drug A and 90 mg…
  • A 28.1 mLmL sample of a 1.56 MM potassium chloride solution is mixed with 15.0 mLmL of a 0.900 MM lead(II) nitrate solution and this precipitation reaction occurs: 2KCl(aq)+Pb(NO3)2(aq)→PbCl2(s)+…
  • . Determine the quantity of hydrogen atoms in 0. 1488 g of phosphoric acid , H PO. X STARTING AMOUNT ADD FACTOR ANSWER RESET )
  • Preview File Edit View Go Tools Window Help () 4 9 8 Sun Feb 27 8:10 PM ooo Screen Shot 2022-02-27 at 8.09.31 PM … Screen Shot 202… Q . Ionic Compounds with Variable Charges – Write the Symbol and…
  • Refer to the procedure and indicate the technique you will use to isolate CaCO3 from the mixture.
  • VSEPR: Pre-Lab Questions (continued) 1. A) Identify what is incorrect about the following Lewis Structure. review File Edit View Go Tools Window Help Screen Shot 2022-02-27 at 8.09.50 PM Q Q [ .. . Sc…
  • Paration of IVAtun Time Left:0:24:50 Tulasa Kafley: Attempt 1 Question 4 (1 point) Refer to the procedure and indicate the technique you will use to isolate NaCl from the mixture. A) decantation B) ev…
  • Enter your answer in the provided box. You have 534 mL of chlorine trifluoride gas at 754 mmHg and 31 C. What is the mass (in g) of the sample?
  • How many grams solid precipitate will form if 77.79 grams of MgCl2 react with excess AgNO3 ?
  • Separation of Mixtures 0:30:00 Time Left:0:25:39 Tulasa Kafley: Attempt 1 Question 3 (1 point) w If NaCl was placed in a beaker of water and dissolved, what kind of change would occur? O A) physical c…
  • Using the conservation of mass law, calculate how much NaCl, table salt, forms when 27.4 g Na reacts with 42.3 g Cl2.
  • Calculate the moles of S2Cl2 if 4.06 g S8 are used. Â Â Â b. Calculate the moles of S2Cl2 if 6.24 g Cl2 are used. Â Â Â c. What is the limiting reagent in this reaction? Â Â d. Calculate the p…
  • use molar volume of a gas at stp to get mass: what mass of sulfur must burn to produce 3.42 L of SO2 at STP?
  • Calculate the moles of MgO if 2.50 g Mg are used. Â Â Â b. Calculate the moles of MgO if 5.10 g O2 are used. Â Â Â c. What is the limiting reagent in this reaction? Â Â d. Calculate the percen…
  • The equilibrium constant, Kc, for the following reaction is 1.94×10-2 at 728 K. 2HI(g) -H2(9) + I2(9) Calculate Kc at this temperature for the following reaction: 1/2H2(9) + 1/212(9) -HI(9) KO =. The …
  • Calculate the initial reacting concentration of IO3, when 8 mL of the solution is mixed with 2 mL of distilled water and 10 mL of HSO3 solution?​
  • Consider the following system at equilibrium where AH = 10.4 kJ/mol, and Kc = 1.80×10-2 , at 698 K. 2 HI (g) =H2 (9) + 12 (9) When 0.36 moles of HI (g) are removed from the equilibrium system at const…
  • need help figuring out dilutions with naOH. What volume of water must be added to 49 ml of 3.6 M NaOH to reduce its concentration to 1.8 M? Answer in mL
  • If 2.42 x 10 mol of argon occupies a 66.5-mL container at 290C, what is the pressure (in torr)? toIr
  • please pay attention to sig figs thank you. A certain liquid x has a normal freezing point of 4.30 c and a freezing point depression constant K, =3.14 .C.kg.mol . Calculate the freezing point of a sol…
  • Pick 5 light sources that you can lookÂthrough using a spectrophotometer. Compare the spectra of the varies light sources you looked at. Identify at least one difference and at least one similarity a…
  • Determine the pH of the following buffer solution that is a mixture of 50.0 mL of 0. 144 M acetic acid and 50.0 mL of 0. 137 M sodium acetate. Ka of acetic acid is 1.8 x 10’s. 3. Determine the pH o…
  • Weighted average mass=2.300g/washer use dimensional analysis oks 1) Using the weighted average mass of a washer, calculate the number of grams in one mole of washers. 2) Using the weighted average mas…
  • How do I calculate the initial reacting concentration of IO3, when 8 mL of the solution is mixed with 2 mL of distilled water and 10 mL of HSO3 solution?​
  • Write the equilibrium constant for the following reaction: CaO(s) + CO 2 (g) → CaCO 3 (s)
  • 1 attempt left Check my work Be sure to answer all parts. During World War II, a portable source of hydrogen gas was needed for weather balloons, and solid metal hydrides were the most convenient form…
  • Hi there, I am working on a lab report for chemistry with the information that follows. I need to identify the missing information in the lab scenario. After performing some lab I documented some data…
  • . HOMEWORK #2 1 a) Rate of Chemical Reactions, b) Diffusion Problem 1: Two reactants A and B react chemically in the cell cytoplasm to produce two products X and Y. Y is utilized in a subsequent rea…
  • I need to apply the Q test to find out if the outlying result is retained or rejected at 95% confidence level.. a. 41.11, 41.64, 41.84, 41.67 Q = Qcrit = Decision: C b. 7.293, 7.283, 7.383, 7.286 = Qc…
  • Consider the following system at equilibrium where AH = -16.1 kJ, and Kc = 154, at 298 K. 2NO(g) + Br2(9) #2NOBr(g) If the VOLUME of the equilibrium system is suddenly increased at constant temperatur…
  • I’m not sure if my values are correct.. cvg.cengagenow.com tHollerCrouchs Fundamentals of Analytical Che… C OWLV2 | Online teaching and learning resource Ref Sea water contains an average of 1.08 x …
  • please explain and give correct answer. The pkb values for the dibasic base B are pkb1=2.10 and pkb2=7.58. Calculate the pH at each of the points in the titration … The pkb values for the dibasic…
  • A mixture of CO2 and Kr weighs 37.7 g and exerts a pressure of 0.707 atm in its container. Since Kr is expensive, you wish to recover it from the mixture. After the CO2 is completely removed by absorp…
  • I really need help with these practice questions. Show detailed calculations so I can understand better please .. 1. In a first-year chemistry undergraduate lab experiment, you are asked to determine …
  • mn; remove the sep-pack Fill a syringe with 10 ml of 25% IPA solution, attach the sep-pack, and push the solution through slowly to remove and collect the 2nd color in a 2nd test tube, remove the sep-…
  • Please help me complete the table.. quel Red: Attempt 1 A student who came late for chemistry class realized that they were late for an experiment This experiment was designed to compare the reactivit…
  • Is this the triple point? Please help me if it is wrong. Thank you
  • . Ascorbic acid (C HO ) is also known as Vitamin C. What quantity in molecules of C HO does a Vitamin C drink with 1025 mg C H O contain? X STARTING AMOUNT x ( ) =
  • Is this gas? Please help me if i am wrong 98kPa and 80 degrees C Is it gas, triple point, critical point, solid or liquid. D 22,089 Critical point C Ice Water (solid) (liquid) Pressure (kPa) 101 Tripl…
  • 1 attempt left Check my work Enter your answer in the provided box. A 81.1-g sample of dinitrogen monoxide is confined in a 4.47-L vessel. What is the pressure (in atm) at 117.C? atm
  • The element gallium (Ga) freezes at 29.8 °C, and its molar enthalpy of fusion is AFfus = 5.59 kJ/mol. (a) When molten gallium solidifies to Ga(s) at its normal melting point, is delta S positive or n…
  • . Determine the quantity of hydrogen atoms in 0. 1488 g of phosphoric acid , H PO. X STARTING AMOUNT ADD FACTOR ANSWER RESET * (
  • . Balance the following chemical equation (if necessary): C H (9) + 0,(9) – CO(g) + H,O(1) 174- 3_ + 02+ 3+ 14+ 1 2 3 4 5 6 7 8 9 0 01 3 04 05 07 8 Do + (s) (1 ) (g) (aq)
  • 5 HW Saved Help Save & 5 3 attempts left Check my work Be sure to answer all parts. How many moles are contained in each number of grams of table sugar (C12H220 1, molar mass 342.3 g/mol)? Enter y…
  • What is the specific heat capacity of a substance of mass 142.6 g that increases in temperature from 22°C to 27.5°C after absorbing 1.1 kJ of energy in the form of heat? Express your answer in J…
  • Hello! I need help with these questions as soon as possible. I have done 1, 3, 4, 7 and I need help with 2, 5, 6, 8. I will also attach a picture of the wrongs answers I got. Since 8 is cut out it is …
  • On the periodic table, where would you expect to see all the elements that have three valence electrons? o In the same period as Al o In the same group as Al o In the same period as N o In the same gr…
  • What is the volume (in cm ) of a sample of aluminum that has a mass of 281 g? Draw a Lithium atom that has an atomic mass of 7. Use a different symbol for protons, neutrons and electrons. Based on the…
  • What were your two density values for the magnet? Did you get the same number for both the direct measurement and the water displacement method? Why or why not? (Remember: 1 cm3=1 mL so g/cm3 and g/mL…
  • Â Â 2. Â Â 3. Â 4. Â Â. Name the following organic compounds: compound name CH, CH., CH, – CH,- CH – CH, CH,- CH – CH, – CH, – CH, – CH, CH, – CH, – 2- CH, CH, – CH, – C- CH, – CH, – CH, CH,…
  • Describe how temperature and pressure affects the solubility of a solute in a solution. Calculate the mass percent of the following solution: 11.6g of NaNO 3 in 86g of water Calculate the mass perce…
  • Consider the following reaction where Kc = 1.80×10-4 at 298 K. NH4HS(s) -NH3(9) + H25(9) A reaction mixture was found to contain 5.26×10-2 moles of NH4HS(s), 1.80×10-2 moles of NH3(g), and 1.34×10-2 m…
  • REPORT SUMMARY Charge of Stable lon Metal or Non-Metal Isoelectronic with Fluorine lon? Choose.. Choose.. Fluorine Non-metal N/A Choose. Choose.. Choose. Metal Choose… Strontium Choose.. Choose . Ch…
  • 1)Calculate the molality of the following solution: 13g of KBr in 93g of water 2)Calculate the molality of the following solution: 37g of glucose (C 6 H 12 O 6 ) in 64g of water 3)Calculate the mass p…
  • Part 1: Trial 1: 10 mL of 0.05 M KlO 3 and 10 mL of 0.01 M NaHSO 3 Trial 2: 5 mL of 0.05 M KlO 3 with 5 mL of H 2 O and 10 mL of 0.01 M NaHSO 3 Trial 3: 2.5 mL of 0.05 M KlO 3 with 7.5 mL of H 2 O …
  • Consider the following reaction where Kc = 1.80×10-2 at 698 K. 2HI(g) -H2(9) + 12(9) A reaction mixture was found to contain 0.276 moles of HI(g), 4.74×10-2 moles of H2(g), and 3.61×10-2 moles of 12(g…
  • Topic: Vitamins Vitamins play an important role in your life. Among their many functions are strengthening your bones, healing wounds, and bolstering your immune system. choose a vitamin and conduct s…
  • A chocolate bar cost $4.36. You can collect litter at a rate of 1 piece per 30. seconds. If the local recycling company pays out $0.000050 per piece of litter that you bring in. Then how long, in days…
  • please pay attention to sig figs thank you. Some measurements of the initial rate of a certain reaction are given in the table below. [N2. [H2 ] initial rate of reaction 0.587M 10.334M 0.798 M/s 0.587…
  • The equilibrium constant, Kp, for the following reaction is 2.20×104 at 723 K. Calculate Kc for this reaction at this temperature. 2NH3(9) -N2(g) + 3H2(9) Kc =. The equilibrium constant, Kc, for the f…
  • tcalc use 95%. Grab Bag R = 0.08206 L . atm / mol.K = 8.314 ] / mol.K PV=nRT 1 mile = 1.62 km 1 m = 1.094 yards 4.184J cal 1 atm = 101.325 kPa = 760 Torr = 1 bar = 1000mbar 1 inch = 2.54 cm 1 1b…
  • 10Whprominentasdisplayed eRspectroth cinarod (satifanilamide Refecthepectrshowtheextboolsign theandisthellbonds tothe CCbondthoenzeig hetretchineguertonedbondseypicathe fingermegton
  • is formaldehyde ionic or covalent, please provide reason and answer.
  • Be sure to answer all parts. A bottle of the pain reliever ibuprofen (C13H1802, molar mass 206.3 g/mol) has 420 tablets. Each tablet contains 150. mg of ibuprofen. (a) How many moles of ibuprofen does…
  • At 30.0°C, a gas has a volume of 4.75 L. What will the volume be at 80.0°C?
  • A weighed amount of sodium chloride is completely dissolved in a measured volume of 4.00 M ammoniaÂsolution at ice temperature, and carbon dioxide is bubbled in. ÂAssume that sodium bicarbonate is f…
  • . PRE-LAB DATA TABLE Number of Bonding Nonbonding Electron Domain Molecular Electron Pairs Pairs Geometry Geometry Domains 2 2 0 Linear linear trigonal trigonal 3 3 O Plannar Planner W 2 trigonal pl…
  • Steel is andalloy of iron and carbon with a specific heat capacity of 0.466 J/g.K. Based on the underlying premise of this lab exercise (e.g. AW ~ 25/C, for metals), explain why you would expect it…
    • Can you elaborate on why the moles of CO2 and moles of carbon atoms the same? 2.) How can the data in this Model be used to calculate the following quantities: Moles of CO2 Moles of C atoms Moles …
  • figuring out the net ionic equations. Table 1. Predicted results. NR = No Reaction; ppt = precipitate Solution AgNO 3 Naz CO3 NaBr NH,CI Ca(NO3)2 H2SO4 NaOH BaClz AgNO3 Na, CO3 Ag2 CO3 ppt AgBr NaBr N…
  • Graph the heating curve of ethanol using the information given. Check off each box as you add additional information to your graph so that none is missed. Background Information on Ethanol: Boiling po…
  • 4 is lowest, 1 is highest. Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose…
  • At Low Temperature the pink color predominates. At High Temperature the blue color is strong. If we represent the equilibrium as: C02+(aq) + 4Cl'(aq) = CoCl42′(aq) We can conclude that: E 1. This re…
  • show solution in change in oxidation number method not half-reaction. use oxidation number change method Steps is balancing redox equation: 1. Assign oxidation numbers to all the elements. 2. Determin…
  • Slices of cheese left over Use the "Custom" option in the simulation to check your answers. Were your predictions correct? Yes or no: Yes 4. Research what "limiting reactant" means…
  • At Low Temperature the pink color predominates. At High Temperature the blue color is strong. If we represent the equilibrium as: Co2+(aq) + 4CI-(aq) = CoCl42-(aq) We can conclude that: 1. This reacti…
  • Please list, in detail, 3 realistic and doable ways to separate the following unknown mixture. The liquids used are unknown. What are the most doable methods to fully separate this heterogeneous mixtu…
  • . C – % by weight (10 pts) — Write a procedure explaining how to prepare a solution with a – by weight of solid compound X. The mass of solution must be 267.0 g. The value of I is provided in the …
  • M (:13. A At High Temperature the red color is strong. At Low Temperature the gas has less color. If we represent the equilibrium as: 2 N02(g) .=’ N204(g) We can conclude that: E1. This reaction is:…
  • If 0.250 L of a 4.60 M HNO₃ solution is diluted to 2.00 L, what is the molarity of the new solution? 2. A 15.0 mL solution of Sr(OH)â‚‚ is neutralized with 29.9 mL of 0.350 M HCl. What is the con…
  • Answer each of the following questions considering the data for the following reaction given the data below: C2H4Br2 + 3I- → C2H4 + 2 Br- + I3-  a. What is the rate law? Answer____________…
  • . The expression InPvap (torr) = 19.434 – 1568 T(K) relates vapor pressure of NO(@) to its temperature. For NO(s), the sublimation pressure is given by InPsub (torr) = 23.136 – 1975 T(K) Use this in…
  • Answer all questions completely and in your own words. SHOW ALL CALCULATIONS AND WORKS:. 3. Answer the following: a) What is a basic anion? b) Which anions in this experiment are basic anions? c) Show…
  • Using water molecules as an example, tell what the difference is between a covalent bond and a hydrogen bond? Use pictures or diagrams to help explain your answer if needed. (You may NOT use pictur…
  • Critical Thinking: Application 1. Based on your results, predict the type of bonding, molecular geometry, and molecular polarity of the following molecules: Molecule Type of Bond Molecular Geometry Mo…
  • Can a molecule with polar bonds ever be nonpolar? Why or why not? 4. Using your data, does there appear to be a correlation between molecular geometry and polarity? Do you notice a pattern between …
  • Would CH4 and H2O be soluble in each other? Why or why not?
  • Rank the four types of imfs from weakest to strongest. Explain the reason for each of your ranking by indicating/discussing the attractions between the molecules.
  • COMPOUND X = COPPER(II) NITRATE, MOLARITY Y=0.136M MOLARITY A=… Â COMPOUND X = COPPER(II) NITRATE, MOLARITY Y=0.136M MOLARITY A= 0.0867M, Z%= 4.12 Online Assignment 1 – Write a procedure for Items …
  • You are tutoring a high school chemistry student who is just learning about kinetics. Pick one of the student’s questions below to answer: “I don’t really understand what a rate law is. What informati…
  • . For the reaction J + Nc –> products many experiments were performed at different temperatures to determine the rate constant, k. Results were plotted in an In k vs 1/T graph which resulted in …
  • . For the overall reaction 3X X3 the experimental rate law was determined to be rateexp = k[X]3[X3] The proposed mechanism is: X3 + X – X2 (fast) 2X + X2 – 2X3 (slow) a. Determine if this mechanism …
  • You receive 2,164 gallons of Chardonnay juice. You run some base chemistry and you determine that the fermentable sugar is 245g/L, pH 3.3, TA 5.7g/L with a NOPA of 57ppm and Ammonia of 39ppm. You i…
  • For the reaction bB –> products At 298 K, the initial concentration of B is 0.83 M. The reaction was allowed to run and data was collected then plotted in an In B vs time graph, which resulted in …
  • KINETICS OF A CLOCK REACTION Part 1: Trial 1: 10 mL of 0.05 M KlO 3 and 10 mL of 0.01 M NaHSO 3 Trial 2: 5 mL of 0.05 M KlO 3 with 5 mL of H 2 O and 10 mL of 0.01 M NaHSO 3 Trial 3: 2.5 mL of 0.05 M K…
  • . V V JX GIUOUS Bromocresol Green 1.3957436 0.1578 0.1318 " PivotTables 4x V fx D Methyl Red Sad Dev ARel St Dev 95% CI. (M) 0.001526 rubbs 0.658191 O Get Add- ins PivotTables Tat Pictures Shap…
  • The p𝐾b values for the dibasic base B are p𝐾b1=2.10 and p𝐾b2=7.58. Calculate the pH at each of the points in the titration of 50.0 mL of a 0.80 M B(aq) solution with 0.80 M HCl(aq). please ex…
  • V V JX GIUOUS Bromocresol Green 1.3957436 0.1578 0.1318 " PivotTables 4x V fx D Methyl Red Sad Dev ARel St Dev 95% CI. (M) 0.001526 rubbs 0.658191 O Get Add- ins PivotTables Tat Pictures Shapes I…
    • 2- 3-. Consider the reaction: 2 —-> products The half—life of this reaction is dependent on the initial concentration of Z. The reaction rate slows down as it progresses. Select all the stat…
  • 23 3 attempts left Check my work Be sure to answer all parts. How many grams are contained in 9.90 mol of each compound? Do not convert these answers to its scientific notation. a. C2 H2 Book g rint b…
  • Â 2. Â Â 3. Â Â 4. Â Â Â 5. Â Â Â 6. Â Â 7. Â Â. For each of the noble gases (group 18 elements) presented below, fill in the number of protons, numbers of neutrons, and the ratio of…
  • I need a clear and good answer pls. 2. Herway Chirality + Example 3. Chirality why is it important in pharmacy company digram + Examples . "
  • Determine the total volume in milliliters of water a chemist should add if they want to prepare an 0.200 M aqueous solution with 30.2 g of NaCl ? Assume the density of the resulting solution is the sa…
  • please explain and give correct answer of each parts thanks. The pkb values for the dibasic base Bare pkb1=2.10 and pkb2=7.58. Calculate the pH at each of the points in the titration of 50.0 mL …
  • I am doing my chemistry IA and it is on food calorimetry. I can not figure it out what I am doing wrong, i am using the formula for heat with q. I am calculating peanuts which from my data I used 50 g…
  • need help figuring out dilutions.Â. A 9.6 M solution has 3 equal volumes of pure water added to it. The new concentration in M is?
  • please explain each and give answer of each parts thanks. What is the pl after addition of 75.0 mL HCI? PH = 6.48 What is the pH after addition of 100.0 mL HCI? 6.22 PH = Incorrect
  • The equilibrium constant, Kc, for the following reaction is 1.:43x1c}4 at 673 K. NH3(9] + Hug) =NH4I(s) This reaction is E favored at equilibrium. Enter PRODUCT or REACTANT. The concentrations of NH3 …
  • Write the formula for each of the following compounds (.5 marks each):  gallium fluoride iron (III) oxide strontium chloride lead (IV) nitride diphosphorus pentoxide lead (IV) permanga…
  • Name the compounds (.5 marks each):Â Â GaNÂ Cs 3 PÂ Be 2 CÂ HgF 2Â Â Cu 2 SÂ Fe 3 N 2Â Â Sn 3 P 4Â Â S 2 F 2 Â N 2 O 4 Â Cl 2 O 7 Â H 2 S (aq)Â HBr (aq)Â H 2 CO 3 (aq)Â H 2 SO 3 (aq)…
  • The equilibrium constant, Kp, for the following reaction is 2.21:»(104 at 723 K. Calculate KC for this reaction at this temperature. 2NH3(9} =N2(9] + 3H2(9). The equilibrium constant, Kp, for the fol…
  • solve for Grubbs value. the mean and standard deviation is given the # of obs is 5 use the value for 5 which is 1.672 and solve for each one. L3 Report Q ~ Search Sheet AutoSave OFF Home Insert Dra…
  • . 8. The following three reactions represent a simplification of the chemistry of NO, NO2 and O3 in the troposphere. (i) NO + 03 NO2 + 02 KI (ii) NO2 + hv NO + 0 f2 (iii) O + 02 +M > 03 + M K3 Ea…
  • A concept map for four types of intermolecular forces and a certain type of bond is shown. Which of the following correctly identifies the intermolecular force represented by A and compares its streng…
  • . 7. Hydroxyl radicals are powerful hydrogen atom abstractors as depicted by the reactions below. The concentration of methane (CH4) is roughly constant throughout the troposphere and is estimated a…
  • need help figuring out dilutoons.Â. What volume of water must be added to 182 ml of 3.6 M KOH to reduce its concentration to 0.7 M? Answer in mL
  • Consider the following reaction: 2HI(g) =H2(g) + 12(9) If 1.54 moles of HI(g), 0.203 moles of H2, and 0.318 moles of 12 are at equilibrium in a 10.9 L container at 908 K, the value of the equilibrium …
  • TEMPERATURES IN THE ICE WATER BATH, ‘C ( minutes 5.5 to 10 ) Time 5:30 6:00 6:30 7:00 7:30 8:00 8:30 9:00 9:30 10:00 Water Ethanol
  • . 5. A natural decomposition route for N2O is a stratospheric photochemical reaction: N20(g) + hv N2(g) + (*(g) AHOf (N20, g) = 82 kJ mol AHof (N2, g) = 0 kJ mol AHOf (O, g) = 247 kJ mol Excitation …
  • What mass in grams of hydrogen produced by reaction of 4.73 g of magnesium with 1.83 g of water ? Mg + h20= mg(oh)2+h2
  • What’s balanced chemical equation for the reaction. Of Maganese to yield manganese (v11) oxide ?
  • If the complete combustion of an unknown mass of ethylene (c2h4) produces 16.0 g co2, what mass of ethylene is combusted ? C2h4 + o2= co2 +h20
  • How was question 10 calculated? Please show step-by-step. Q7-10. The following four questions refer to the equilibria: 2 NaHCO3(s) – NazCO3(s) + H20(g) + CO2(g) K(110.C)=0.68 7) If CO2(g) is added to …
  • How is it e? Please explain step by step. 26) Set up the ICE table that you would use to find the pH of a solution that is 0.0025 M HNO3 and 0.10 M lactic acid (HC3H503, Ka=1.4x 10-4). Using x as the …
  • m.. Task 1) Even before the surge of COVID-19 cases in the Philippines due to the recently detected Omicron variant of the coronavirus, scientists from different parts of the globe, particul…
  • What mass of oxygen is formed from decomposition of 125 g of hydrogen peroxide (h2o2)?
  • Can you send me final answer I don’t need explanation Â. Gmail YouTube Maps M1000(N) – Chemical Structure (Winter’22) d / My courses / CHEM1000 (N) – Chemical Structure (Winter’22) / WEEKLY QUIZZES…
  • . L3 Report Q ~ Search Sheet AutoSave OFF Home Insert Draw Page Layout Formulas Data Review View Share Comments Insert v Calibri (Body) v 12 A Wrap Text v General Ex AY- O. Ex Delete I V Z Sort &amp…
  • Hi can you give me the final umber I dont need explanation Â. Quiz 4 (Week of Feb 14) (page x C What Is The Specific Heat Cap X GWhich of the following stateme X F C eclass.yorku.ca/mod/quiz/attemp…
  • Describe the characteristics of a double replacement reaction, how it is identified, and types of compounds in the reactants and products. Give an example in your response. (10 points)
  • . By applying the steady-state hypothesis to the species CH3. and CH5. show that the mechanism: C2H6 -> 2 CH3′ CH3* + C2H6 -> CH4 + C2H5′ C2H5. > C2H4+ H. C2H6 + H. -> H2 + C2H5. 2 C2H5’…
  • Status: No credit | Points earned: 0.00/1.00 Suppose NaOH standardization of KHP determined that a volume of 25.00 mL NaOH has a concentration of 0.049 M. Suppose 22.20 mL of KHP was used to get to th…
  • . The decomposition of a certain compound can be modelled using the following chain mechanism: RH -> R. + H R. -> M . + 1 H. + 1 -> M RH + M . -> R. + C R . + M . -> P Assuming steady…
  • Which of the following is NOT true? Select one: O Phenolphtalein indicator turning dark pink is the expected outcome of a good HCI + NaOH titration. O The equation MAVA = MBVB is an appropriate repurp…
  • please explain each and answer all parts. When a pot in heated, it atport illo, joules of boat from the surroundings, At the same time, the pos erpandi, doing pressure-volume work (P .V work) on th…
  • No credit | Points earned: 0.00/1.00 A buret Select one: measures how much of titrant is contained in it when you read the meniscus correctly. X is primed by rinsing, washing, and filling in t…
  • Which of the following is NOT one of the recommended steps to take if NaOH spills? Select one: O Dilute it with DI water. X Absorb with inert materials such as sand. Use citric acid to neutralize. . U…
  • . Task 1) Even before the surge of COVID-19 cases in the Philippines due to the recently detected Omicron variant of the coronavirus, scientists from different parts of the globe, particular…
  • Question 2: In this lab , you will make observations of reactions between compounds . Before starting an experiment it is important that scientists can predict what is likely to nappen so that the, ca…
  • Which of the following indicators would be best to use to minimize indicator error for the following titration curve? PM PH VOLUME OF BASE ADDED Titration curve of a weak acid (CH,COOH) with a strong …
  • Describe any flaws in technique that may lead to variability in the volume of water transferred.
  • Â Â 2. 3. Â 4. Â. Name the following organic compounds: compound name CH, – CH, – CH, CH, – CH, – CH, -C- CH, – CH, – CH, CH, – CH, CH., – CH,, – CH. CH, – CH, -C – CH, – CH, – CH, CH, – CH, – …
  • If the standardization of 25.00 mL NaOH solution by KHP consumed 12.30 mL of 0.1 M titrant, what is the concentration of the NaOH solution? Select one: O 4.90 M O 0.098 M (x 9.84 M 0.049 M
  • Data Table 6: Water Displacement Method
  • molality (m )= moles of unknown solute mass of naphthalene ( kg moles of unknown solute = molality x mass of naphthalene E(k E. Once we have the moles of the unknown, we can find the m of the unknown …
  • A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report? (5 points)  Length  Mass  Temperature  Volume
  • How many milliliters of an aqueous solution of 0.244 M chromium(II) sulfate is needed to obtain 6.06 grams of the salt? mm
  • . A buffer is prepared using acetic acid, CH3COOH, (a weak acid) and sodium acetate, CHgCOONa (which provides acetate ions, the conjugate base), according to the following proportions: Volume of CH3…
  • Please help with the following question. Sbuject: Biological Inorganic Chemistry Topic: Acid Base Reactions. 5. Show that the product of the dissociation constant (K.) of a weak acid and the hydrolysi…
  • . Make sure that you follow this strategy to enter the formula with subscript: For example: CaCO3 needs to be written as –> CaCO 3 NazCO3 needs to be written as –> Na_2CO_3 It is accepting o…
  • Discuss the metabolism of ethyl alcohol in the body. Which step is the rate-limiting step
  • cengagenow.com C My Home C OWLv2 | Online teaching and learning resource from C.. C What Volume Of 0.100 M Na3P04 Is Required To P [References] 1 pt Describe the preparation of 250 mL of 3.70 M H3…
  • cengagenow.com My Home C OWLv2 | Online teaching and learning resource from Cengage [References] What volume of 0.04400 M AgNO; would be required to precipitate all of the I in 350.0 mL of a solut…
  • What is the easiest method of balancing equations please?
  • D represents ion-dipole forces, which are weaker than the force represented by C. Â D represents hydrogen bonding, which is weaker than the force represented by C. Â D represents ion-dipole fo…
  • . 1. 5"" Define the terms paramagnetism and diamagnetism. Discuss how these terms relate to paired and unpaired electrons in a material. . Imagine there is a strong magnet sitting on an a…
  • Figure 2. 2. Report the linear function equation (trendline equation) and R2from the graph above: The linear function equation Slope 3. Write your trendline equation in terms of Absorption (A), molar …
  • . Question 1 True or false: London dispersion forces are present in polar molecules. Not yet answered Select one: Marked out of True 1.00 False Flag question Question 2 True or false: Relatively spe…
  • . Information Work through the virtual investigation "Mystery Lab" in Unit A, Section 3 Lesson 2. Flag question Note that most labs in the course will not work on mobile devices such as ph…
  • 4 being fasted and 1 being slowest. Rank the samples of gas described in the table below in order of increasing average speed of the atoms or molecules in them. That is, select "1" next to t…
  • #32 please don’t round off when doing the work. For the reaction A(g) – 2B(g), a reaction vessel initially contains only A at a pressure of PA = 1.18 atm. At equilibrium, PA = 0.23 atm. Part A Calcula…
  • HS -1 (aq) + HNO2(aq) ⇌ H2S (aq) + NO2 -1 ( aq) Review the Lewis concept in the chapter notes. Identify the proton (H+1) donors and acceptors, as well as the electron pair acceptors and donors, on b…
  • #31 please don’t round off when doing the work. For the reaction 2A (g) – B (g) + 2C (g), a reaction vessel initially contains only A at a pressure of PA = 270 mmHg . At equilibrium, PA = 71 mmHg . Pa…
  • solve the images 1,2,3. BromoCresol Greet henol Red Methyl Re HEEEI 10 A" A fx Grubbs Phenol Red CamScanner
  • . Pyridine is a weak base with the formula, C5HN, the Kb for Pyridine is 1.8 x 10-9 In aqueous solution, pyridine partially dissociates according to the following reaction: C5H5N + H20 # C5H5NH+ + O…
  • #30 please don’t round off when doing the work. Consider the reaction H2 (g) + 12(g) – 2HI(g) A reaction mixture in a 3.650-L flask at a certain temperature initially contains 0.7610 g H2 and 96.90 g …
  • Question 10 Â Â Question 11 Question 12 Question 13 Question 14 Using a molar heat of combustion of hexane (C 6 H 14 ) -4163 kJ/mol, the mass of hexane required to increase the temperature of 1.21 L…
  • Do you think 1 g of sucrose or 1 g of sodium chloride will melt at a higher temperature? Why?
  • #29 please don’t round off when doing the work. Consider the following reaction: Co (g) + 2 H2 (g) – CH3 OH (g) A reaction mixture in a 5.22-L flask at a certain temperature initially contains 26.9 g …
  • How do you find the number of valence electrons for the main group elements in the periodic table?
  • #27 please don’t round off when doing the work. Part A If a reaction vessel initially contains an N204 concentration of 0.0550 M at 500 K, what are the equilibrium concentrations of N204 and NO2 at 50…
  • #25 please don’t round off when doing the work. Consider the following reaction: HC2 H3 02(aq) + H20(1) – H3O+ (aq) + C2 H3 02 where Kc = 1.8 x 10- at 25 . C. V Part A If a solution initially contains…
  • #24 please don’t round off when doing the work. Consider the reaction Br2(g) + Cl2(g) – 2BrCl(g) Ko = 1.11 x 10-4 at 150 K A reaction mixture initially has a Br2 partial pressure of 745 torr and a Cl2…
  • Question 1 A hot iron bar is lowered into a 400 g sample of water which is at a temperature of 24.0°C . If the water sample absorbs 2300 J of energy, the final temperature of the water is ab.c…
  • Reasoning Refer to the Scientific Reasoning document for help with each section. The key theory used in this measurement was the first law of thermodynamics (e.g. conservation of energy). Use experime…
  • #21 please don’t round off when doing the work. At 700 K, CC14 decomposes to carbon and chlorine. The Ko for the decomposition is 0.76. Part A Find the starting pressure of CC14 at this temperature th…
  • #20 please don’t round off when doing the work. The equilibrium constant for the reaction SO2 (9) + NO2 (g) – SO3 (g) + NO (g) is 3.1. Part A Find the amount of NO2 that must be added to 2.2 mol of SO…
  • #19 please don’t round off when doing the work. Carbon monoxide and chlorine gas react to form phosgene: Co(g) + Cl2 (g) – COCl2 (g) Kp = 3.10 at 700 K V Part A If a reaction mixture initially contain…
  • Jenkins is just being discharged with some new medications. As the student nurse you will be assigned a medication. You will need to develop a teaching plan and a handout/pamphlet for patient educ…
  • #18 please don’t round off when doing the work. Solid carbon can react with gaseous water to form carbon monoxide gas and hydrogen gas. The equilibrium constant for the reaction at 700.0 K is 1.6×10-3…
  • Write the resonance forms of ozone, O 3 , the component of the upper atmosphere that protects the Earth from ultraviolet radiation. (Copy and paste the given template as many times as necessary. Assig…
  • You need to make an aqueous solution of 0.213 M magnesium sulfate for an experiment in lab, using a 500 mL volumetric flask. How much solid magnesium sulfate should you add? Â 2. How many millilit…
  • #14 please don’t round off when doing the work. Consider the reaction for the decomposition of hydrogen disulfide: 2H2S(g) – 2H2(g) + S2(g), Kc = 1.67 x 10 at 800. C A 0.500 L reaction vessel initiall…
  • Two different atoms have four protons each and the same mass. However, one has a positive charge while the other is neutral. Describe what each atomic structure could be, listing the possible number a…
  • #13 please don’t round off when doing the work. Consider the reaction for the decomposition of hydrogen disulfide: 2H2S(g) – 2H2(8) + S2(8), Kc = 1.67 x 10 at 800 C The reaction is carried out at the …
  • . Ion-dipole interactions can occur between any ion and any molecule with a dipole. Identify all of the following pairs of species that can interact via ion-dipole ford Check all that apply. > Vi…
  • #9 please don’t round off when doing the work. Part A Explain how you might deduce the equilibrium constant for a reaction in which you know the initial concentrations of the reactants and products an…
  • #8 please don’t round off when doing the work. A reaction vessel at 27 . C contains a mixture of SO2 (P = 3.00 atm ) and O2 (P = 1.20 atm ). When a catalyst is added the reaction 2 SO2 (g) + 02 (g) – …
  • #7 please don’t round off when doing the work. Consider the following reaction: Co(g) + 2H2(g) – CH3 OH(g) The reaction between CO and H2 is carried out at a specific temperature with initial concentr…
  • . Problem 4 (20 points) The typical diffusivity of Li ion in LiCoO2 is 2 x 10-10 cm2/s. If we want to be able to charge a battery with LiCoO2 electrode in one hour, what is the rough upper limit of …
  • Concerning the electrons in the shells, subshells, and orbitals of an atom, how many can have a. n=3, (=2, m(=0, and my =+1/2? b. n=3, {=2, and me=0? c. n=3 and f=2? d. n=3? e. n=3, {=2, and ms =+1…
  • Molecular Formula # Lone pairs on central atom = Ve – 8n / 2 Lewis Dot Structure Molecular Shape Polar / Non-polar  H 2 O      PF 3      SiCl 4      CO 2     …
  • Â Â Â 2. Â Â 3. Â. V There are three sets ofsketches below, showing the same pure molecular compound [hydrogen chloride, molecular formula HCl} at three different temperatures. The sketches a…
  • Because I couldn’t highlight the question because it was already highlighted, I highlighted the answer instead: “What is the H + ion concentration of a 0.010 M NaCN solution?”. 22x 11 M
  • Write Lewis structures for the following molecules or ions. (Assign lone pairs, radical electrons, and atomic charges where appropriate.) AlH 3 SO 2 Cl 2 BrO 3 − XeOF 2
  • Which of the following explains how one of the postulates in John Dalton’s atomic theory later became robust knowledge? (5 points) Â Some scientists found that some atoms of a particular element have…
  • In human cells a compound known as NADH is involved in a reaction that generates an electrical potential. The reaction is based on the two half-reactions shown in the table. The balanced equation for …
  • A gas sample of 17.0 g is constituted of 15.8 g of carbon, the rest being hydrogen. Given that the sample’s volume is 4.9 L at NTP conditions, calculate the molecular formula for th…
  • . Consider the following system at equilibrium where AH = 18.8 kJ, and Kc = 9.52×10-2, at 350 K. CH4(9) + CCl4(9) -2CH2Cl2(9) When 0.28 moles of CCl4(9) are added to the equilibrium system at con…
  • chemistry question. A microwave oven produces 951 Joules per second of microwaves, having a wavelength of 12.24 cm. It takes 3 minutes and O seconds to heat a pop a bag of popcorn. How many photons of…
  • Because I couldn’t highlight the question because it was already highlighted, I highlighted the answer instead: What is the pH of a 0.090 M CH 3 COOH (acetic acid) solution? The answer is pH = 2.9 Not…
  • . 22:39 – P & Call Ril 35% Edit 50 X Tutorial problems 1. Place x’s in as many boxes as are appropriate for each case. matt heterogene homogeneo mixtu substan compou eleme er ous US re ce nd nt …
  • What is the actual yield of iron inÂmoles? What is the theoretical yield of iron inÂmoles? What is the percentÂyield? Please explain step by step
  • Because I couldn’t highlight the question because it was already highlighted, I highlighted the answer instead: The first and second ionization constants of H2 CO 3 are 4.2 × 10^ -7 and 4.8 × 10^ -1…
  • Please help me fill out the chart by submitting the answers in the same chart form so it’s clear to read also please show me two graphs for both charts. STOCK SA Planned dilutions: 1.25×10^-4 M Â. …
  • . 10. Discuss the intermolecular and intramolecular forces in N2H4 and CZH4. Based upon the bonding between molecules, which of these two compounds would have a lower boiling point? Which of the fol…
  • While ethanol CH3CH2OH Âis produced naturally by fermentation, e.g. in beer- and wine-making, industrially it is synthesized by reacting ethylene CH2CH2 Âwith water vapor at elevated temperatures….
  • Could u please show how to solve this problem step by step. If the answer is unreadable, here it is: Calculate the concentration of H+, OH – , F – ions and undissociated HF molecules in 0.010 M HF. 23…
  • iron(III) nitrate and sodium phosphate Express your answer as a chemical equation. Identify all of the phases in your answer. Enter NOREACTION if no reaction occurs. 2. NaI(aq)+Hg2(C2H3O2)2(aq)?…
  • I need help with how to create this graph even if it’s just helping with the steps Â. Data Table 3: Concentration and Absorbance Test Tube Concentration of Red Dye in Test Tube (M) Absorbance B 0.0…
  • Calculate the Volatile Acidity (VA) in g/L for a 10.0 mL wine sample that uses 10.12 mL of a 0.0097M NaOH solution to titrate to a pink Phenolphthalein endpoint. (5 pts.)
  • Arrange the following solutions in order of increasing boiling point elevation and then provide anÂexplanation for your arrangement. ÂÂÂÂÂÂÂÂÂÂÂÂÂÂ 0.50 m KCl; 0.5 m C6H6O6, 0.5 m Fe(NO…
  • Write out the full electron configuration for each of the following atoms and for the monatomic ion found in binary ionic compounds containing the element. Â Electron configuration for the atom and E…
  • . Which of the following would become more soluble in water at lower temperature? A) O, (9) B) CH,CH CH CH,CH, (1) C) CH (1) D) CHO. (s). Which of the following aqueous solutions would have the h…
  • Li2SO4(aq) Sr(ClO3)2(aq)Â→ÂSrSO4(s) 2LiClO3(aq)Li2SO4(aq) Sr(ClO3)2(aq)Â→ÂSrSO4(s) 2LiClO3(aq) The molecular equation you determined in Part B is shown above for your convenience. Examine each…
  • . Based only on intermolecular forces, which of the following would be the most soluble in CH CH,OH? A) CH OCH, B) CH CH,CH,CH, C) HO D) CH CH,OCH,CH,
  • . What is the molarity of ions in a 0.972 M solution of AlBr, assuming the compound dissociates completely? 2 points The percent by mass of ethanol (MM = 46.07 g/mol) in an aqueous solution is 28…
  • . A nonvolatile solute is dissolved in benzene so that it has a mole fraction of 0.277. What is the vapor pressure of the solution in torr? (P of benzene is 26.5 torr) 5 points What is the osmoti…
  • Â Â Â Â Â Â. There are three sets of sketches below, showing the same pure molecular compound (carbon monoxide, molecular formula CO) at three different temperatures. The sketches are drawn a…
  • I need help with these 2 questions, how would you answer them? 1. Without using the sim, predict the mass… 2. Do you think its possible to convert between mass, moles, and atoms, without using the s…
  • Identify the Products of the following Double Displacement reactants predict whether or not it will form a precipitate. complete the chemical equation and balance don’t forget the states. a) sodium…
  • Please help with the following question. Subject: Biological Inorganic Chemistry. Topic: Acid Base Reactions. 2. With full explanation, determine which one of the following pairs you would expect to b…
  • 21) Which of the following statements is NOT correct about ideal gases? A) There are no interactive forces (i.e., attraction or repulsion) between the particles of a gas. B) The average speed of gas p…
  • 4 Thereisa mpeekat 7/ anuwhichindicates lossof auwhich indicates alikedy loss of what atons? 5 Thisisindoatived a ester fundional gap
    • In no more than three sentences, describe the difference between soft water and hard water in terms of their chemical composition. (3 marks) b) What are two benefits of soft water over hard water f…
  • . Part A A gas mixture contains each of the following gases at the indicated partial pressure. N2 219 torr O2 109 torr He 249 torr What is the total pressure of the mixture? Express your answer in t…
  • What analyses have been conducted concerning relative improvements in health outcomes from specific courses of action? If no relevant studies exist, are any data available for conducting an economic …
  • The chemical reactions that occurs during the titration of Ca?* (aq) and Mg2+ (aq) with EDTA. a. MgY2- + Ca2 -> (from 1.00:1.00M EDTA, Mg2+ addition) MgY2- + Ca2 -> Mg2- + CaY2- Mg2+ + Caln &…
  • Â Â 2. Â. Draw the condensed structure of 6-chloro-2-methyloctane. ct C C X 5 C Click anywhere to draw the first atom of your structure.. iodide in water. A chemist makes 840. mL of mercury(II) …
  • How many moles of oxygen atoms are combined with 4.20 moles of chlorine atoms in Cl207?
  • Predict the charge on the monatomic ions formed from the following atoms in binary ionic compounds. (Enter your answer using the format +1 and -2.) Rb F Ba Sn Se Ga            …
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  • Which of the following compounds is an acid according to the Arrhenius theory? (1 mark) H3 PO4 KOH CH3NH2 Ba(OH)2
  • I cant highlight the question cause its already selected so i highlighted the answer instead: The pH of a solution is 4.45. What is the H + ion concentration?. 10. [H+] = 3.55 x 10- M
  • I cant highlight the question cause its already selected so i highlighted the answer instead: What is the pH of a 0.0055 M HA (weak acid) solution that is 8.2% ionized? (Ans:3.34)
  • I cant highlight the question cause its already selected so i highlighted the answer instead: What is the pH of a 2.0 M NH3 solution?. H 11.8
  • I cant highlight the question cause its already selected so i highlighted the answer instead: The pH of solution A is 2.0, and the pOH of solution B is 10.0. How many times greater is the H +(aq) conc…
  • The question is already identified so I cant select it so i highlighted the answer. “Calculate the concentration of H+, OH – , F – ions and undissociated HF molecules in 0.010 M HF.”. TH 1= [F-] = 2.3…
  • . Classify the following equation: 2Al(s) + 6HCl(aq) – 2AlCl3(aq) + 3H2(g) This reaction is combustion decomposition double replacement single replacement synthesis. Which equation represents conser…
  • Which of the following compounds is a base according to the Arrhenius theory? (1 mark) O HF O HaPO3 Ca(OH)2 OH20
  • (eight marks) The equilibrium constant for the reaction of hydrogen and nitrogen to form ammonia is Keq = 4.1 x 108 at 25 .C. A reaction was run and the equilibrium concentrations were found to be …
  • . ten marks Use the ollowin; in ormation to answer the next uestion. In the Haber-Bosch process of manufacturing ammonia, nitrogen is treated with hydrogen, which results in an exothermic reaction. …
  • Hello, can someone help me with this exercise, I don’t understand what to do?. It is possible to summarize the directions for analysis of the Group I cations in a flow chart. In the chart, successive …
    • The wavefunctions of a particle in a two-dimensional square box of side L with n1 = 1, n2 = 7 are n-fold degenerate. Two of such wavefunctions are Try 47.1 sin sin 41,7 . sin sin L L L L Provide a…
  • . (c) The density of a cubic crystal CsCl is 3.97. gom". The eight corners are occupied by CI" ions with Cs ions at the body centre. (i) Calculate the distance in pm between the two neighb…
  • Please help me by replying to the questions because I am confused and don’t understand well. Â. Experiment #4 Introduction to the Scientific Method Answer all the bold and red colors questions. Ex…
  • I don’t understand all the questions please help me. Answer with details. Part C: Naming acids 51. HCIO4 59. H3PO3 52. H3PO4 60. HCIO 3 53. HCI ( aq) 61. HzCO3 54. H2SO4 62. H2SO 3 55. HNO2 63. HCIO 2…
  • A sample of gallium bromide, GaBr2, weighing 0.165 g was dissolved in water and treated with silver nitrate, AgNO3, resulting in the precipitation of 0.299 g AgBr. Use these data to compute the %Ga (b…
  • Naming and Writing the Formula of Ionic and Molecular Compounds Complete the naming and writing formulas of the following compounds – they are all mixed up, so determine a strategy to help you ensure …
  • givenl co QUESTION 2 What is the expression for the equilibrium constant (k c) for the reaction below? A 3 (9) + B 9C (9) = A 3C (9) + 3 B 3 (9) Kc= O [A 3C][ B 3] 3 [A 3][B 9C] O [A 3][B 9C] [A 3C][ …
  • QUESTION 3 1 points Save Answer The reaction below has an equilibrium constant of 3.796×10 3 Which statement correctly describes the reaction? A 3 (9) + B 3C g (9) = A 3B 3 (g) + 3 G 3() The products …
  • 871×10-8 QUESTION 6 1 points Save Answer Given the equilbrium concentrations of the reactants and products below, what is the equilibrium constant (k c) for the reaction? A3 () + B 3C g (9) = A 3B 3…
  • 057×10 3 M QUESTION 8 1 points Save Answer BA The following reaction begins with only the reactants present. The [CCI 4] initially is 0.6400 M. [CH 4] initially is 0.5100 M, and the k c is 4.519x 10…
  • 13) A sample of helium has a volume of 2.39 L at 1.22 atm pressure. What will its volume be if the pressure is changed to 2.37 atm? Â 14) ÂIf the kelvin temperature of a gas is doubled and its volum…
    • ÂConvert 1.03 atm to mmHg and torr.  2) ÂConvert 985 torr to atm and mmHg .  3) ÂConvert 1.87 atm to psi and torr.  4) ÂWhat’s the temperature in K at 37 oC?  5) ÂWhat’s the temper…
  • . Question 17. Use the correlation of plateau modulus and packing length developed in Section 11.6.2 to predict the molecular weight between entanglements, Me for poly(vinyl acetate). Table 6.1 prov…
  • . 15. Consider the tracer diffusion coefficient of polystyrenes in the melt, at 176 .C. At this temperature, Me = 13,000 g/mol, Mo = 104 g/mol, and kT/ = 10-9 cm2/s. What is D, for M = 13,000 under …
  • For the reaction shown, find the limiting reactant for each of the following initial quantities of reactants.  2Li(s)+Cl2(g)→2LiCl(s)  Part A 1.0 g Li; 1.0 g Cl2 Express your answer as a chemica…
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  • . Title: Rf 1 1) For 1 points, identify phase which is typically composed of a solid substance. a) Mobile Phase b) Stationary Phase Type: MT Title: Rf 2 2) For 2 points, indicate True or False. a. R…
  • A forensic scientist is given sample of two unidentified solutions. The identities of these solutions could affect the outcome of a court case. She needs to determine whether either solution contains …
  • Please show me the graph using the chart provided. Data Analysis UV/VIS Standard Curve for SA Using your UV/VIS data, create a Beer’s Law graph of Absorbance versus [SA] in Excel or a related graphing…
  • . Trial # Elapsed Time 125 seconds 2 240 seconds 509 seconds 4 251 seconds 553 seconds 6 313 seconds *J 562 seconds
  • . Trial # Elapsed Time 125 seconds 2 240 seconds 509 seconds 4 251 seconds 553 seconds 6 313 seconds *J 562 seconds. Determining the exponents m and n: Prepare the following two plots and attach the…
  • Please help me fill out the charts and questions below and show me graphs for each chart.. Show work for all calculated values associated with the 10-minute sample for Experiment A in the table below….
  • Why can some synthesis reactions be considered combustion reactions? Give an example to support your answer.
  • Serotonin, composed of":1 H, N, and O, facilitates neuronal communication. The molar mass of serotonin is 116.00 glmol. By combustion ofa 5.31 g sample, serotonin was found to contain [3.3 g c…
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  • . 10 < A cvg.cengagenow.com G Chapt. 15 HW OWLV2 | Online teaching and learning resource from Cengage Learning Chapt. 15 HW [Review Topics] [References] 1. Buffers: Identify 10 pts M Use the Refe…
  • Question 2 Which of the following metals are ones that can have variable charge? Iron Lead Potassium Chromium Question 5 What is the correct name of SO3? Answer: Sulfure trioxide Question 6 What is th…
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  • With Solution. 20 points Save Answer Terephthalic acid, used in the production of polyester fibers and films, is composed of carbon, hydrogen, and oxygen. When 0.6943 g of terephthalic acid was subjec…
  • With Solution. gestion 5 Sulfur trioxide can react with atmospheric water vapor to form sulfuric acid that falls as acid rain, Calculate the mass in grams of 3.65 x 10^2 molecules of SO3
  • Write out the molecular, ionic and net ionic equations (if applicable) for the following mixtures of solutions. a. CaS and (NH4)2SO3 b. MgBr2 and AgNO3 c. NH4OH and LiNO3
  • 🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺 HELP ME PLEASE 🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺🥺. SMILE (Sr’lrwr’vt-d Mums intende…
  • With Solution. Sulfur dioxide reacts with chlorine to produce thionyl chloride (used as a drying agent for inorganic halides) and dichlorine oxide (used as a bleach for wood, pulp and textiles). SO2(9…
  • Saved Match each of the following units to the quantity for which it is appropriate. mol kg.m kg.m2 K S $2 g. K C cal kg.m mol.K $2 Energy Specific Heat Capacity Molar Heat Capacity None of These
  • . cvg.cengagenow.com G Chapt. 15 HW OWLV2 | Online tea Chapt. 15 HW [Review Topics] (References] Buffers: Identify 10 pts M Use the References to access important values if needed for this question …
  • . cvg.cengagenow.com +0 G Chapt. 15 HW OWLV2 | Online teaching and learning resource from Cengage Learning [Review Topics] [References] 10 pts Use the References to access important values if needed…
  • Question 1 Calculate the number of oxygen atoms in 29.34 g of sodium sulfate, Na,SO4.
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  • Answer both 25 and 26. Question 25 1 Point X For the following compound, calculate the molar mass: H20Example: CHCl3 = 119.38 amu Use the editor to format your answer Question 26 1 Point For the follo…
  • Answer both 23 and 24 please. C X Question 23 1 Point During her presentation, Zahara was asked several questions from the audience and to provide the molecular formula for molecules that the audience…
  • Classify each Lewis structure given below by electron-group arrangement. X X=A-X X-A; X .. X X X X X . X X-A-X X I A X-A-X X X X X-A X * * X-A-X X-A-X X X XEA-X X X X : A. X=A-X X : A X X * * Linear T…
  • Discuss two approaches (methods) based on week-intermolecular forces on detection of ATP over AMP? please explain,
  • Question 20 1 Point During her presentation, Zahara was asked several questions from the audience and to provide the molecular formula for molecules that the audience had questions about. Help Zahara …
  • Be sure to answer all parts. How many sigma bonds and pi bonds are there in each of the following molecules? H H CI- -C- CI H C H -C H C C C- H – H H H H (a) (b) (c) Enter the number of sigma bonds, f…
  • … Differentiate reduction reaction from that of the oxidation reaction according to cellular perspective or point of view. Give specific example in differentiating the two biochemical reac…
  • Could the Periodic Table be arranged differently? How would you arrange the Periodic Table and Why? Â NOTE: PLEASE DO NOT PROVIDE COPY/PASTE OR PREVIOUSLY ANSWERED ANSWERS.
  • How do we know that air is not a single substance? Metals have many similar properties, but not all properties are shared by all metals. Why is it useful to group them as metals? Why is it important t…
  • Consider the followingÂequilibrium: 2ÂNOCl (g)  ÂïƒÂ2ÂNO (g)    Â+       Cl 2(g)  A chemist places 2.00 mol NOCl in a 1.0 L container. Describe the changes graphically…
  • Just give the answers only !!! Â. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Identify a good buffer. 1) A) a solution containing signifi…
  • . 5. [0/1 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER When H, O and CO react at 970.C, the products are CO, and H2. The equilibrium constant (in terms of equilibrium concentrations of…
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    • What physical property allows creatures such as water spiders to walk on water? (2 marks) b) How can this property be explained at the molecular level? (2 marks)
  • Why is a large body of water much like an air conditioner to any adjacent land in the beginning of summer? (3 marks)
  • . A student who came late for chemistry class realized that they were late for an experiment This experiment was designed to compare the reactivity of four metals (A, B, C and D) with aqueous …
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  • . 16. [-/2.5 Points] DETAILS MY NOTES ASK YOUR TEACHER Consider this reaction between solid iron and water vapor. 3 Fe(S) + 4 H20(9) = Fe304(s) + 4 H2(9); AH = -151.2 kJ/mol When chemical systems ar…
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  • . Problem 3 (25 points) (1) Assume a Li ion conductor has an ionic conductivity of 10- S/cm at 298 K. Calculate the ionic conductivity at 60 ‘C and -20 C for activation barrier of 0.2 ev. (2) Based …
  • . Problem 2 (25 points) From the results below for 102 M Mn(Ill) and 102 M Mn(IV), estimate jo and ko. What is the predicted exchange current density jo for a solution with 1M Mn(Ill) and 1M Mn(IV) …
  • Please help. Search Results | Course Hero X Welcome to Student Portal X Content C newconnect.mheducation.com COLLIGATIVE PROPERTIES . FREEZING-POINT DEPRESSION INTRODUCTION LABORATORY SIMULATION 1) Wh…
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  • How do I calculate concentration with these values?. Calibri 11 v BY MV Av … Ev ab Number v .00 00 7.0 EV APV OV . . . C12 fx A B C D E F G H I J K L M N O P Q R 1 Volume Standard Distillled H20 Vol…
  • I selected the answer to the question because i cant select the question. Here is the question: “What is the H + ion concentration in a 0.82 M HOCl solution? Given K a = 3.2 × 10 ^-8”. [H = 1.6X 10 M
  • I selected the answer to the question because i cant select the question. Here is the question: “What is the pH of a 0.090 M CH 3 COOH (acetic acid) solution”. H
  • I selected the answer to the question because i cant select the question. Here is the question: A 1.0 M HF solution is only 2.6 percent ionized. What is the K a value for HF?” If the answer was cut of…
  • I selected the answer to the question because i cant select the question. Here is the question: “Calculate the percent ionization in a 1.0 M solution of nitrous acid, HNO2”
  • Assignment on Redox Reactions. Show complete solution. I. Balance the given molecular equation using redox (electron- transfer method). Identify the element oxidized, element reduced, oxidizing agent …
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  • . Activity 6: IMFs Directions: List all types of IMFs that would occur in each of the following compounds: a. CH3CF3 c. NO2 b. CCI4 d. BrF
  • .. processing questions: 1.Did the ball roll when you laid it on the floor?Why? 2.What made the ball roll? 3.What was the direction of the rolling ball? 4.Did the ball continue moving towards you…
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  • . 2. For a reaction with the equation A -> 2B, the rate of appearance of product B is twice as great as the disappearance of reactant A. If the rate of disappearance of A in a certain reaction is…
  • What precautions should be taken in analyzing water samples from the point of collection to the laboratory? (10) Â3. Describe the sample preparation, injection, and analysis of the following instr…
  • please explain and answer all subparts, thanks. 1. The following ESI-MS spectrum of intact histone H4 was collected using positive ion mode. Species A For Species A, m/z is 703.3 Species B and i…
  • How would i calculate the concentration at each of these values?. File Home Insert Draw Page Layout Formulas Data Review View Automate Help Editing Share Comments Catch up 1 v [ v Calibri 11 v By M Av…
  • . Practice problems O. Write a balanced chemical equation (using integers for coefficients) for the decomposition of ammonium nitrate, NH,NO; (s) into N2 (g), Oz (g) and H,O (g), and use data from s…
  • . Law of Dulong and Petit 0 115 46 Specific Heat Capacity: Class Data for Various Metals Report the specific heat capacity to your instructor who will share the data with the class. Use the class da…
  • Â Â 2. Â 3. Â. Ammonium phosphate ((M4)3PD4) is. an important ingredient in many fertilizers. It can he made by reacting phosphoric acid (1131304) with ammonia (“”33- What mass of ammonium …
  • please explain and aswer both parts. ) A drinking water utility wants to precipitate Cut in its water as the mineral solid malachite (Cuz(OH)>CO;(s)). The controlling solubility equilibrium for …
  • Please help.Â. D Element Question 22 1 Point During her presentation, Zahara was asked several questions from the audience and to provide the molecular formula for molecules that the audience had que…
  • For many purposes we can treat nitrogen (N2) as an ideal gas at temperatures above its boiling point of – 196 °C. Suppose the temperature of a sample of nitrogen gas is lowered from 23.0 °C to – 15….
  • Â 2. Â 3. Â Â. A chemist must dilute 66.9mL of 105. mM aqueous barium chlorate (Ba(CIO, ) ) solution until the concentration falls to 44.0 mM . She’ll do this by adding distilled water to the s…
  • Please help.. dent Portal X View Assessment Mail – Jair DiazRodriguez – Outlo x + learning.rasmussen.edu/ultra/courses/_110044_1/grades/assessment/_11129893_1/overview/attempt/_24822908_1?courseld=_11…
  • Explain why newly polished copper is reddish in color, brass is yellow, and aluminum is silver-colored. Would an alloy of silver and gold have a color that lies somewhere between those of the pure met…
  • The following is a cooling curve showing the release of heat at a constant rate of 300.0 joules/minute from a 3.00-gram sample of water vapor at 140.0"C. The final temperature of the ice is -2…
  • Activity 3.2.2 – Heating and Cooling Curve (Performance Task) A. The following graph is a heating curve showing the addition of heat at a constant rate of 500.0 joules/minute to a 3.00 gram sample of …
  • Questions: 1.What is the chemistry term for a phase change when a solid becomes a liquid? 2.What is the chemistry term for a phase change when a liquid becomes a gas? 3.Describe the phase change that …
  • Please helpÂ. C Dipole-dipole Question 34 1 Point If borane (boron and hydrogen) had 11.55% hydrogen, what is the empirical formula of the compound? Use the editor to format your answer Question 35 1…
  • How do you determine the polarity of a substance? Give one application of polarity seen in everyday life. Answer in not more than five sentences. thank you
  • Calculation of the Cp (estimated) In previous years the calorimeter constant has been estimated as the heat capacity of the solution only. This estimated heat capacity is approximately the weight of s…
  • Please draw the following molecules: (i) Propane-1,2-3-triol (Glycerol, Glycerine); (ii) 2-cyclopentyl-cis, cis-4,7-nonadien-1-ol (b) Which of the compound in 1(a) is water-soluble? Please explain …
  • Direction: Answer the question. Explain in 3 sentence/s. 70%% Solution 40% Solution Antibacterial Kamlizar Figure 2. 70% Ethyl Alcohol Figure 3. 40% Isopropyl Alcohol Source: google.com/search?q=ethyl…
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  • For the sample chromatography, identify the likely substances/dyes present in Unknown #2. (Mark all that apply) RGO BI 45 uI uz yellow #5 dye purple dye red #40 dye unknown dye/substance blue #2 dye o…
  • For the sample chromatography, identify the likely substances/dyes present in Unknown #1. (Mark all that apply) RMO BI ys uI uz blue #2 dye yellow #5 dye unknown dye/substance blue #1 dye red #3 dye p…
  • why was my question wrong and how would i find the answer. Table salt, NaCl(s), and sugar, C HO, (s), are accidentally mixed. A 4.00 g sample is burned, and 3.20 g of CO, (g) is produced. What was the…
  • Given the reaction: 2 S O 3 ⇋ 2 S O 2 + O 2 Determine the partial pressures of all the substances in this reaction at equilibrium, if 1.00 atm of SO3 is put inside a container at 680 Kelvin given th…
  • Please fill all the blank with answers and units.Â. Include units with all results. Express results to the proper number of significant figures. Unknown identifying number F Mass of beaker “&quot…
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  • combustion of 2.30 g of hydrogen produced 7.35 g of CO2 and 2.63g of H20. How would I write the empirical for the hydrocarbon?
  • My data: Class Data: Trial Mass of empty crucible (g) Mass of crucible + Mg          (g) Mass of crucible + product         (g) Trial 1 46.42 46.697 46.86 Trial 2 43….
  • . 1.Which of the following atoms and ions is the largest? vagen, 5e, 02" Se”? Explain using the periodic trends, effective nuclear charge, Ionization energy.r and atomic radius 2.Using the va…
  • Â 2. Â 3. Â. A chemist must dilute 66.9mL of 105. mM aqueous barium chlorate (Ba(CIO, ) ) solution until the concentration falls to 44.0 mM . She’ll do this by adding distilled water to the solu…
  • Hi tutor, can you please tell me what are these unclear words? I can’t read it. Â 1. 2. 3. Â Â. Air dry and recrystallize the cride product from ethermal
  • . l|ul’ll’hich element in the periodic table has the largest ionization energy? Provide an explanation {such as atomic radius, Zefi, bonding] on why this element has the largest ionization energy a…
  • If you recorded the final temperature of the mixture before thermal equilibrium was reached what effect would this have on the value obtained for specific heat capacity? a) The value for c would be to…
  • If you recorded the final temperature of the mixture before thermal equilibrium was reached what effect would this have on the value obtained for specific heat capacity?
  • The neutral atom with an atomic number of 10 and a mass number of 20. The neutral atom with an atomic number of 8 and a mass number of 16.
  • Calorimeters are designed to prevent loss of heat to the environment, but no calorimeter is perfect. There will always be thermal energy transferred between system (calorimeter) and environment. Assum…
  • What is the maximum ferric concentration in 5L of water from ferric hydroxide at pH 2.5, 7.2, and 10.3? considering Arrhenius theory.
  • . Ke= 54 mol / L copper. (2 marks) 5. Write an appropriate chemical equation for the quantitative reaction of dissolved silver ions with solid 6. Write an appropriate chemical equation for the pr…
  • I have no idea about these questions below. Â. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Choose the statement below that is TRUE. 1) …
  • can someone help me with this? Â. Intermolecular Forces Worksheet 1. For each of the following compounds, determine the intermolecular force(s) involved in each. You may find it useful to draw Lewis …
  • Given the specific heat for aluminum is 0.900 J/g·°C, how much heat is released when a 3.8 g sample of Al cools from 450.0°C to 25°C? A.Â54 J   B.Â60 J  ÂC.Â86 J  D.Â1.5 kJ?…
  • Is either of the following reactions likely to take place according to the pKa data in Table 1.2? (a) HCN CH3CO2 Na 88n Na CN CH3CO2H (b) CH3CH2OH Na CN 88n CH3CH2O Na HCN
  • I have no idea about these questions. Â Just give the answer only. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Identify a good buffer. 1)…
  • How did they get the available neutralization for HCl?
  • Calculate the energy in joules of an electron in a hydrogen atom transitioning from the n = 3 to the n = 4 energy level.
  • Can you help me to find Unknown metal 1 and 2? Based on the data that given in the picture.. Sn Ay Cu Fe Al Unk 1 Link, 2 Al w/ 50 09 50 0g 50 03 ethanol 150 01 50 09 50 01 50.09 50.09 150 C 150. 150 …
  • . Strontium-85, used for bone scans, has a half-life of How long will it take for the radiation level of strontium-85 to drop to one-sixteenth of its original level? 65 days. Express your answer as …
  • . V Part A Strontium-85, used for bone scans, has a half-life of 65 days. How long will it take for the radiation level of strontium-85 to drop to one-fourth of its original level? Express your answ…
  • Content X LON-CAPA Partial Pressures and | X M MyOpenMath X 43 hoc O X + V X -CD lewis.chem.sfu.ca/res/sfu/batcheloroblems/lecture/set4/part.pres.2gas.problem#17 G m Ung dung M Gmail YouTube Microsoft…
  • Â Â 2. 3. Â 4. Â. v Two sets of ionizations are shown in the tables below. Complete the tables by ordering each set of ionizations by increasing amount of enemy.’ required. In other words, for …
  • Phase Diagram of a Substance Temperature (KI Pressure (atm.) Guide Question: 1. What phase change will occur if this substance is slowly compressed at a constant temperature from 0.5 atm to 45 atm.? P…
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  • No. Component name Probability Molecular formula Molecular weight Area (%) 1. Hexane (CAS) 30.50 C6H14 86 0.32 2. Ã-PINENE, (-)- 15.80 C10H16 136 0.24 3. Ã-PINENE, (-)- 10.01 C10H16 136 0.04 4. B…
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  • Trial Mass of empty crucible (g) Mass of crucible + Mg          (g) Mass of crucible + product         (g) Trial 1 46.42 46.697 46.86 Trial 2 43.57 43.863 44.027 Tria…
  • Please help with these questions. Greatly appreciated. Thanks!  1. Acetic acid is a weak acid: ÂCH 3 COOH; the K a for acetic acid is 1.76 x 10 -5 In aq solution, acetic acid partially dissociate…
  • Complete Table 1: Paper Chromatography Data and Observations and the calculations . Save your completed Table 1 and calculations together as a single PDF document to submit in the Lab 8 Assignment. Yo…
  • Thinking dynamic equilibrium, what could you change to speed up or slow down the reaction? (concentration of KIO3 and temperature have already been done). Explain the trend you would expect with ea…
  • Hexane is a common laboratory solvent and a component of petrol. Its combustion reaction is as follows: 2 C6H14 (9) + 19 02(9) – 12 CO2(9) + 14 H20(1) ArH =-8326 KJ mol-1 Use the reaction enthalpy val…
  • A drink bottle has a capacity of 270 mL. What is this volume expressed in SI units of m3 ? (Give your answer to at least two significant figures and do not include the units in the answer box. The num…
  • Chem 30 – Unit 4 -Â 4.1 – Dissociation & Molarity Questions Write dissociation equations for the following compounds (Include states!) 1. Potassium chloride 2. Iron (III) sulfat…
  • The ideal gas law may be expressed as: PV = nRT, where the gas constant, R = 8.314 kPa L mol-1 K. Calculate the volume in litres of a party balloon filled with 0.31 mol of helium to a pressure of 140 …
  • moduIC DASSESSITIETTI QUIZ Reaction rates increase with temperature: Select one: by providing an alternative pathway for the reaction to follow that requires less energy only because there are more co…
  • If 0.8 M HCI is added to an equal volume of 0.2 M NaOH, what are the new concentrations of OH and H30+ ? (hint – remember to account for the effects of both dilution and neutralisation) Select one: [H…
  • A concentrated solution of ammonia has a pH of 11.67. What is the hydroxide concentration, [OH (aq)] in mol L:1? Give your answer to at least THREE significant figures, and do not include the units. (…
  • s / 2021-CHM101/CHM111(OL-OUAS4) / Assessment / Module 3 Assessment Quiz HNO3 is a strong acid. Calculate the pH of an aqueous 0.0663 M solution. (Give your answer to at least 2 decimal places) Answer…
  • Deduce whether the following aqueous solutions are acidic, neutral or basic (alkaline): (a) A solution with [H+(aq)] = 10-12 M is (b) A solution with [OH (aq)] = 107 Mis (c) A solution with pH = 9 is …
  • What is the correct equation for the reaction quotient of the following reaction? 2Fe3+(aq) + 21 (aq) = 2Fe2+(aq) + 12(s) Select one: [Fe2+12 [Fe3+]2 [1-12 [Fe2+12 [12] [Fe3+]2[1-12 [Fe 2+12 [Fe3+12 +…
  • Calcium sulfate is only sparingly soluble. CaSO4(s) = Ca2+(aq) + S042-(aq) For this type of dissolution reaction the equilibrium constant, also known as the solubility product, is denoted Ks. In the r…
  • Each of the following curves corresponds to the concentration of one of the chemical species in the reaction: 2 CO2(9) = 2 CO(g) + 02(9). Identify which chemical species is associated with each curve:…
  • Consider the redox reaction by which hydrogen gas is produced from reaction with iron and acid: 3 H(aq) + Fe(s) – Fe3+(aq) + 3/2 H2(9) ArtP = -58 KJ mol-1 (a) What is the value of A,H for the related …
  • Determine which of the following single replacement reactions will occur using the activity series and complete the equations that do:  1.) Cl 2  + 2 F -1  →  2.) Ba + Fe…
  • [References] Find the amount in millimoles of the indicated species in ? a. 480 mg of P205. Amount = 1.69 x mmol # Incorrect b. 22.0 g of CO2. Feedback: Incorrect Amount = X Correct Answer(s): c. 12.9…
  • 1). In the following equation how many Hydrogen atoms are on each side? 2H 2 + O 2 –> 2H 2 O a)     2 b)     1 c)     4 d)     ÂNone  2). In the following equati…
  • . (VI) Vibrations of molecules can be approximated by a harmonic oscillator only near the mini- mum of the binding potential curve, i.e., for small amplitudes for vibrations. Much better description…
  • Name NOTE: Throughout this lab report: 1. All questions asking the definition and descriptions of terms must be answered in full sentences, abbreviated responses will not be given full credit. 2. All …
  • . (II) Consider classical and quantum harmonic oscillators. “(hen the classical harmonic oscillator is in the ground state, i.e_, at rest, it sits still at the equilibrium position. This would cor…
  • Using the number of moles calculated in Q #4, calculate the mass of NazCO3 needed to prepare this solution. Show calculations. Record in data table A. Results Data Table A: 1. Mass of CaClz (g) 2. …
  • Some children have reactions to Yellow 5 Dye or Lake. Yellow 5 is a pale yellow color and Yellow 6 is more orange. Look at your green , red , and blue spots. Determine by the colors seen on the chroma…
  • Activity II – ANALYZE AND DISCUSS In your lab groups, discuss the similarities and differences between the spectra observed for the first four light sources (candle, incandescent bulb, fluorescent bul…
  • Need help to complete the table below. Introduction to chemistry.. mation. Observation of Elements Element Symbol Metal, Semimetal, Physical State Color or Nonmetal cobalt Co Solid silver Metal hydrog…
  • Chem 30 – 4.1 – Dissociation & Molarity Questions Write dissociation equations for the following compounds (make sure to include states!) 1. Potassium chloride 2. Iron (III) sulfate Answer the fol…
  • Â Â 2. Â Â 3. Â Â 4. Â Â Â. V A chemist must prepare 850. mL of 35.0 mM aqueous barium acetate (Ba (C, HO, ) ) working solution. He’ll do this by pouring out some 0.381 M aqueous barium ac…
  • Explain please. Can the solution left over from the reaction of chloride and silver nitrate still cause stains? Explain your answer. e / from the rea
  • . SUM Chemistry 30: Unit D Assignment Booklet Variab concer Lesson 5 Assignment: The Equilibrium Constant 1. Write balanced chemical equations, using lowest whole number co-efficient, and the equ…
  • If air bubbles were trapped underneath the solid after it was placed in the graduated cylinder, would the measured volume be artificially high, artificially low, or unaffected? What would be the ef…
  • . The Periodic Law Answer Sheet 1 2 13 14 15 16 17 18 N 4 Laboratory Questions: 1. Using your Reference Tables, what general observations can be made of the trends within periods and groups for each…
  • Identify 3 elements that are used to give color to sparklers and write their electron configurations in the following formats: Full electron configuration by filling order: Full electron configuration…
  • Q: What do these results imply about the stability of the equipment? Think about the impact in changes in flowrate, burner stability, pump speed, detector issues? (Explain briefly). Q: Do any of the w…
  • please see all the attachments too to understand the question.. Heat of Reaction for the Combustion of Magnesium Although you will not be working with actual chemicals during this laboratory, since yo…
  • 75.0mL 14. 15.mass of 20.11g Metal 73.0 Water1.0. ‘9’ K’E “$1? ,ull 96%. from above. (6 pts) C. Calculations (Show all calculations with units on each number and the final answer rounded t…
  • THE CHEMISTRY OF PUDDING What’s Up, Pudding Cup? You are making vanilla pudding with whole milk, sugar, salt, egg, vanilla extract and rice flour. You follow this by making vanilla pudding with wh…
  • Please solve for Molality of solution, Moles of unknown, and molar mass unknown for trial 1 with the given information. Please show all work.. DETERMINATION OF MOLAR MASS BY FREEZING POINT DEPRESSION …
  • Oxygen ions exposed on the edge surface of a goethite crystallite can be bonded to one, two, or three Fe3+Âions in the bulk structure, and there are often deformations within the crystal lattice s…
  • Use standard heats of formation to calculate the heat of formation for liquid water. 2. Calculate the experimental heat of combustion of magnesium using standard heats of formations.  Below is …
  • please explain and give correct value because my value is incorrect
  • Explain please . The formula is CuCl2. nifoie lons. ins 4. What is the mass percent composition (based on the formula) of the copper chloride in this lab? Cuclz Cockz
  • a student performs an experiment to determine the density of a sugar solution. she obtains the following results: 1.71 g/mL, 1.73 g/mL, 1.67 g/mL, 1.69 g/mL. if the actual value for the density of the…
  • Find the pH of a mixture of 0.095 M in HF and 0.225 M HC6H5O. HF Ka= 6.8 x 10-4 HC6H50 Kâ‚‚= 1.3 x 10-10
  • 2 attempts left Check my work A sample of mercury at 12.0C is warmed to 114.0C when 873 cal of heat is added. What is the mass of the mercury? (mercury = 0.0330 kcal/kgc) G
  • What is the difference between an orbit (such as in the Bohr Model) and an electron orbital?
  • indicator 1 is bromocresol green indicator 2 is phenol red
  • 2 attempts left Check my work A heat engine converts 115.0 kcal from a supply of 600.0 kcal into work. How much mechanical work was done? KJ
  • Find the pH of a mixture of 0.095 M in HF and 0.225 M HC6H5O. HF Ka= 6.8 x 10-4 HC6H50 Kâ‚‚- 1.3 x 10-10
  • 2 attempts left Check my work A 1.40 kg block of ice at OC is added to a picnic cooler. How much heat will the ice remove as it melts to water at 0 C? kcal
  • Explain please. 2. Would the following changes produce a result with; too much Cu, too little Cu or a correct formula? Explain each of your answers. a. The use of a 1.0 gram piece of Zn rather than a …
  • What mass of HI must be present in 700. ml solution to obtain a pH value of 0.650?
  • 2 attempts left Check my work A 298.0 g china serving bowl is warmed 66.3C when it absorbs 3.2 kcal of heat from a serving of hot food. What is the specific heat of the china dish? kcal/kgoC
  • 2 attempts left Check my work How many minutes would be required for a 322.0 W immersion heater to heat 222.0 g of water from 15.6 C to 92.70C? min
  • 2 attempts left Check my work A 33.9 g silver spoon at 16.40C is placed in a cup of coffee at 89.50C. A short time later, the spoon is at 83.30C. If, during this same time, the temperature of the coff…
  • 2 attempts left Check my work A 39.0 g silver spoon at 19.90C is placed in a cup of coffee at 89.40C. How much heat does the spoon absorb from the coffee to reach a temperature of 83.5C? (Csilver = 0….
  • Hey Tutor, Can you please give me examples of chemical synthesis to make disinfecting alcohol? The process, equipment, and materials should be achievable by high school students like me.  Minimum …
  • Suppose the candle was placed in a large, sealed jar that allowed it to burn for several minutes before running out of oxygen. The candle and jar are balanced by an equal weight. in this situation, wh…
  • Subject : Research Project Agenda  Hey tutor, can you please give me a chemical synthesis that we can do to make an experiment? this is required in our school. The idea should be original and it sho…
  • Determine the formal charge of each element in the following molecules or ions. (Enter your answer using the format +1 and -2.)(a)HIHI(b)PBr 3 PBr(c)CI 4 CI(d)PCl 5 PCl           ?…
  • Write the balanced chemical reaction for each polymer ( nylon and polyurethan) that you will synthsize (it may be easier if you use Lewis structures instead of chemical formulas).. W AutoSave Off 23_P…
  • A candle is placed on one pan of a balance, and an equal weight is placed on the other pan. what would happen if you lit up the candle and waited for a while?
  • a candle is placed on one pan of a balance, and an equal weight is placed on the other pan. What would happen if you lit the candle and waited for a while?
  • calculate the frequency of the light emitted a photon with a wavelenght of 120nm
  • indicator 1 is Bromocresol green indicator 2 is phenol red. Grab Bag R = 0.08206 L . atm / mol.K – 8.314 J / mol.K PV=nRT 1 mile = 1.62km 1m = 1.094 yards 4.184J cal 1 atm = 101.325 kPa = 760 Torr …
  • Using complete subshell notation (1 s 2 2 s 2 2 p 6 , and so forth), predict the electron configurations of the following ions. ( Hint : For transition metals and inner transition metals, the highest …
  • Is this the proper chemical equation for the demineralization of enamel? or is it Ca10 (PO4 )6 (OH)2 + 14H+ ⇌ 10Ca2+ + 6H2PO4 – + 2H2O ? How is the equation for the demineralization of enamel a equi…
  • Â Â 2. Â 3. Â 4. Â. V Two sets of ionization: are shown in the tables below. Complete the tables by ordering each set of ionizations by increasing amount of energyr required. In other words, f…
  • What are the chromophores for example n-pi and pi-pi* (circle the structure on the compound there maybe two Conjugate pi-bond system chromophores or polyene chromophore) ? Â Â What is the appr…
  • . C Bond Polarities 19) Complete The X | C Name Km Phan Lewis Diagram O X C 19. (6pt, 3ea) Draw All Major Res X Course Hero x Content x Bb CHM 151 – Experiment # 12 – Re\ X + V X < > C learn-u…
  • What are the chromophores for example n-pi and pi-pi* (circle the structure on the compound there maybe two Conjugate pi-bond system chromophores or polyene chromophore) ? Â Â What is the a…
  • Which of the previous compounds are exceptions to the rules? Check all that apply. LiF NH4OH AgBr Fe(OH)3 ZnS AgNO3
  • D Question 8 Determine the element with the highest atomic number that contains a half-filled p subshell in the ground state. O Mn O Bi As O Rn O Fr D Question 9
  • D Question 20 A molecule contains a central atom (A) with no lone pairs and two sulfur atoms doubly bonded to the central atom (as shown below). What is most likely the identity of the central atom? H…
  • Using complete sub-shell notation (e.g., 1 s 2 2 s 2 2 p 6 , and so forth, not abbreviations), predict the electron configuration of each of the following atoms Ti  Yb As Sr Ga      …
  • QUESTION 6 10 points Sav On a paper chromatography travels a distance of 1.53 cm while the solvent front travels a distance of 6.29 cm from the baseline. What is the retention factor Ry of the substan…
  • D Question 14 What is the abbreviated (or shortened) electron configuration for the ion N3-? [He] 2s22p6 O [He] 252 O [He] 2s22p3 [Ne] 3523p6 [Ne] 3523p3
  • Answer all questions completely. SHOW ALL WORK AND CALCULATIONS:. DATA TABLE 2: Ammonia Buffers Buffers # DROPS of 1 ,OM # DROPS of LOM HCI to reach PA = 8.00 Naott to reach ptt = 10.00 solutions 19 2…
  • Using the experimental data, generate an electrochemical series showing the relative activities of the metals and H+. Mg, Fe, Al, Zn, Cu, Na, Ag 2. Using a resource such as a textbook, generate an …
  • https://mercy.blackboard.com/webapps/assessment/take/launch.jsp?course_assessment_id=_79070_1&course_id=_79562_1&content_id=_13499595_1&step=null G Question Completion Status: Support QUES…
  • Existing knowledge, research and views) Describe how sparklers work. Provide as much detail as you deem necessary. (Existing knowledge, research and views) Identify the colors that can be produced by …
  • OS D Question 17 A space probe identifies an element in a sample collected from an asteroid. Successive ionization energies (in kJ/mol) for the new element are shown below. To what family of the perio…
  • any help and explanation will be appreciated. Thanks. Use the following information to answer the next question. The ozone layer reduces the amount of ultraviolet radiation that reaches the surface of…
  • FM-92, an FM radio station, broadcasts at a frequency of 9.25 ✕ 10 7 s −1 (92.5 MHz). What is the wavelength of these radio waves in meters?
  • [McQuarrie 17-49] Effect of changing concentration on rate. Rate = k[A]* (check in with your instructor after this question) a. How does doubling the concentration of "A" change the rate …
  • [Based on McQuarrie 17-7] Consider the 2 03(g) – 3 02(g) a. At one point, APo3/At was found to be -5.0 x 10-4 bar/s. What does the negative sign tell you about the reaction? b. What is the rate of …
  • ÂWhat ion would most likely form for aluminum? How would the size vary between the atom and ion? Explain your reasoning behind both questions.  2.ÂFind the oxidation number for manganese in th…
  • please explain and give complete answerÂ. ka value 1.8 x 10^-5 thanks 1. Calculate the pH of the following solutions. See Table 3.4 for K. values. (6 pts – 2 ea.) a) 0.00639 M HCIO4 PH = 2.19 I al…
  • (Existing knowledge, research and views) Each element has a unique spectrum that identifies it, like a fingerprint for humans. Describe how you would use your spectrophotometer to identify an element….
  • If 4 moles of H20 is required to be produced, how many moles of H2 and how many moles of Oz will be required (without using tables). Show your work. (1 point).
  • D Question 21 What are the formal charges for the carbon atom and the oxygen atom with the double bond in any one of the following resonance structures? OC- 0,0 -0 OC=-1,0 =0 O C = +1,0 =-1 O C = 0,0 …
  • D Question 3 1 pts What is the energy of light emitted from a hydrogen atom when an electron falls from n = 4 to n = 2? The energy of a state with a particular n value is given by E = -2.180210 . Joul…
    • At what temperature (C) the volume of all gases would equal zero? b) What would be the volume of He (g) at 170.C? c) What would be the volume of CH4 (g) at 0 .C?
  • Explain the concept of polymorphism using examples of different allotropes of carbon.
  • D Question 18 This graph represents the first ionization energy for the elements. Which family (i.e., group) on the periodic table would the elements E, F, and G belong to? A B D Ionization Energy (KJ…
  • Sketch a unit cell for the body-centered orthorhombic crystal structure.
  • Alkanes: Using the toothpicks, connect 4 gumdrops (hydrogens) to a central gumdrop (carbon). When connecting the gumdrops, place 2 on the same plane at an angle of 109.5 degrees. Place 2 more at a…
    • Discuss how well your results for the weight % magnesium agree with the class results. (Since the magnesium and oxygen results are related, only the magnesium results need be discussed.) In this di…
  • When only heat transfer and PV work must be considered and we’re at constant temperature, we can write (𝑑𝑈) T = 𝑇(𝑑𝑆) T − 𝑃(𝑑𝑉) T  a) Use this expression for (𝑑𝑈)…
  • . A Kinetic Study of the Oxidation of an Alcohol by chhromate Ion Calculations 1. Make a plot of ln(A—Am} vs. time for each of the five kinetic runs. From the slopes of the plots determine the obs…
  • Can you help me with the post-lab questions? I’m doing a Spectrophotometric Determination of Kc lab. I have finished completing all the datas. Â. Set up five ICE tables, fill them in and calculate th…
  • Â Â 2. Â 3. Â Â 4. Â Â. Calculating molarity using solute mass A chemist prepares a solution of potassium iodide (KI) by measuring out 360. g of potassium iodide into a 300. mL volumetric fl…
  • Question 21 What are the formal charges for the carbon atom and the oxygen atom with the double bond in any one of the following resonance structures? 12- O C =0, 0 =0 O C =-1,0-0 O C = +1,0 =-1 O C =…
  • The vapor pressure of water at room temperature and 1 atm is 0.031 atm. a) Using a piston, you increase the pressure of the water vapor above water to 0.035 atm. By how much does this cause the ch…
  • Please do the calculations.Â. Sample Notebook Page Sample Notebook Page TABLE 2.4 A Readings at maximum wavelength (nm) (Sample Table for Spectronic 20) run 1 run 2 run 3 0.75 M alcohol 1.00 mL M 2.0…
  • On average, a drop of water has a volume of 50.0 microliters. What is the volume in dekaliters?
  • Full Question: Each step in the following process has a yield ofÂ60.0%  CH4+4Cl2⟶CCl4+4HClCH4+4Cl2⟶CCl4+4HCl  CCl4+2HF⟶CCl2F2+2HClCCl4+2HF⟶CCl2F2+2HCl  The CCl4CCl4 formed in the firs…
  • D Question 1 A photon emitted from an excited atom has a wavelength of 1.289 x 10" m. Calculate the frequency of this photon. 1.541 x 10 17 5 1 O 3.864 s*1 O 4.300 x 10 17 5 1 8.541 x 10 42 5 1 O…
  • Light is passed through a solution with a light path of 2 cm, and the absorbance is recorded as 0.40. If the light passed through the same solution at the same wavelength and the light path is reduced…
  • [McQuarrie 16-33] Calculate the boiling point of a solution of 10.0 grams of picric acid, CH2(OH) (NO2)3(s), dissolved in 100.0 grams of cyclohexane, CH12(s). Assume that the colligative molality a…
  • CHEMISTRY Answer all these questions with 5-10 sentences. 1. What are the differences in preparing soap and detergent? , 2. What will be the best thing to use in handwashing and dishwashing? Is it soa…
  • Hello, I’m having problems on how to do this in general, if I can get an explanation on how to do it, it’ll be awesome, thank you so much in advance. Does a reaction occur when aqueous solutions of ch…
  • please explain and answer complete parts. Suppose you performed a recrystallization of unknown compound X and found its melting point to be 1D1.?—1U4.B “C. The reported melting point of o—tol…
  • A quantum model of a diatomic molecule. The simplest model of a diatomic molecule consists of two balls (atoms) connected by a spring obeying Hook’s law (this model is commonly referred to as the &…
  • What pH range would you expect food/drink products to be in ?
  • A solution is prepared by mixing 75.5 g of propyl chloride (M.W. = 78.54 g/mol), C3H7Cl and 83.3 g of propyl bromide (M.W. = 122.99 g/mol). C3H7Br. What is the vapor pressure of the solution at 25°C?…
  • A solution contains 10.8 g of pentane (M.W. = 72.15 g/mol). C5H12. 23.4 g of hexane (M.W. = 86.18 g/mol), C6H14 and 11.8 g of benzene (78.11 g/mol), C6H6. What is the mole fraction of hexane in the so…
  • re com/courses/led758/quizzes/secured#lockdown BYUt Dashboard Copy of GS105WO. D Question 26 Which molecule is polar? CF4 XeFa OF 2 BF3 D Question 27 Which of the following molecular geometries result…
  • . Page < 1 of 2 – ZOOM + Table 2. Concentrations of standard solutions Concentration of stock solution, Mstock 0.200 Volume of Volume of Total Volume of Show one example of calculation: Test tube…
  • SO D Question 30 A molecule contains one central atom with three lone pairs of electrons and two bonding pairs of electrons. What are the central atom’s electron pair geometry AND the molecular geomet…
  • Which of the following sets of quantum numbers is not possible? A) n=1 l=0 and ml= 0 B) n=3 l=-1 and ml= 1 C) n= 4 l=2 and ml= -1 D) n= 2 l=1 and ml= -1 E) n= 5 l= 4 and ml= 3
  • D Question 33 H-O: H H %=C-C=C-C-H – H H In the molecule above how many sigma and pi bonds are there? 13 sigma O 11 sigma, 2 pi O 2 sigma, 9 pi 9 sigma, 2 pi 2 sigma, 11 pi O 13 pi
    • Conclude your discussion by reporting the mole ratio of magnesium to oxygen, calculated from the class values for the experimental mass % magnesium and oxygen. Using this value, report the empirica…
  • When 156.9 g of an unknown nonelectrolyte is dissolved in 424.5 g of benzene, the solution boils at 89.4 °C. Calculate the molar mass (g/mol) of the unknown nonelectrolyte. The K, for benzene 2.53°C…
  • D Question 32 Complete the following Lewis structure (CHON) and identify the hybridization around the nitrogen. H H H H O H-C C- C-CN H H O sp2 O sp3d2 O sp O sp 3 O sp3d D Question 33 H-
  • dont need explanation just answers. QUESTION 6 How many atmospheres is the average tire pressure (1,810 mm Hg)? Refer to the chemistry reference table. O A. 35 atm O B. 2.38 atm O C. 23.8 atm O D. 2.1…
  • Aufbau principle D Question 13 Which of the following chemical species has/have unpaired electrons? (Hint: consider the orbital diagrams) Ar, K*, Cr, and Cu O Ar and K+ O Cr and Cu O K* only O Cr on…
  • D Question 12 What suggests that no two electrons (within an atom) can have the same set of four quantum numbers? O Hund’s rule O Pauli exclusion principle Degeneracy O Heisenberg uncertainty principl…
  • H-O: H H C-C-C-C-H H H In the molecule above how many sigma and pi bonds are there?
  • Â Place the substances you tested in the appropriate locations on the pH scale below:
  • Question 4 Which of the following refers to a specific orientation of an orbital within a sublevel? Os On D Question 5 In a many-electron atom, electron-electron repulsions shield outer electrons from…
  • Why is important to know about CBRN? Why is important to know about Chlorine agent and how to prevent an attack with this agent?
  • Question 2 When the uranium-238 isotope decays, a photon is emitted that has a frequency of 1.032 x 1021 Hz. Calculate the energy of this photon. Note: Hz is equal to 1/s. O 4.822 x 10-12 J O 6.838 x …
  • Question 2 When the uranium-238 isotope decays, a photon is emitted that has a frequency of 1.032 x 10 Hz. Calculate the energy of this photon. Note: Hz is equal to 1/s. O 4.822 x 10 12 J O 6.838 x 10…
  • Hello, Can you help me by checking if my answers for the below questions are corect? Â. Boron 14. Which of the group 13 elements has the largest ionization energy? Berkelium 15. Which of the transiti…
  • . Suppose a certain atom has two available states that are separated in energy by 0.210 eV. Given a sample containing 5.10 mol of the atom at a temperature of 7310 K, how many atoms will be in the h…
  • Question 9 1 pts From Questions 7 and 8 above, what is the DIFFERENT energy of the highest and lowest energy conformation of trans-1,2-dimethylcyclohexane? Enter your numerical answer in the answer bo…
  • D Question 6 1 pts ts What is the energy of the LOWEST energy conformation of the following compound? Et Me Use the following table to determine the relevant energy. Enter your numerical answer in the…
  • D Question 5 1 pts What is the energy of the LOWEST energy conformation of the following compound? Me Use the following table to determine the relevant energy. Enter your numerical answer in the answe…
  • General Chemistry. Module 13: Molar Mass Determination vis Colligative Property (5 pts) Need helpi SCAN Determine the molar mass of an unknown nonvolatile solute of nonelectrolyte compound itly/35dy21…
    • Discuss how well the class results agree with the theoretical expectation by referring to the class relative error from the Table of Results. C. Conclude your discussion by reporting the mole ratio…
  • nothing to add. Listen In carbon-14 dating 1) the radioactivity of carbon occurs naturally. (2) the radioactivity of carbon is artificially induced. 3) radioactive carbon is added to the sample to be …
  • H 3 PO 4 (aq)ÂÂÂÂ +ÂÂÂÂÂ 3KOH (aq)Â ——->ÂÂ K 3 PO 4 (aq)ÂÂÂÂ +ÂÂÂÂ 3H 2 O We also use the same equation to determine the concentration (molarity) of a dilute solution prepar…
  • Neutralization reaction could be used to determine the concentration of unknown acid or base. The process is known as Titration. In titration we use moles of reactants (acid and base) to solve for the…
  • Use APPENDIX to identify the type of brass. Â. Part 2. Table 4. Determination of the concentration of copper in brass (lines 1-4 are given in the assignment) Unknown Sample Number 2 Mass of sample …
  • Proceeding from left to right across a period of the periodic table, the elements become (more, less) metallic. b. Proceeding from top to bottom in a group of the periodic table, the elements be…
  • Did the OH concentration of fresh soda pop and flat soda pop differ by a magnitude of 10 times or greater (yes or no)? 10. From questions 7, 8, & 9, would you conclude that the pH of soda pop i…
  • I’ll appreciate some explanations. Thank you so. Use the following information to answer the next question. Zinc oxide is widely used in the manufacturing of concrete to improve the resistance of conc…
  • Define the “Interaquifer Leakage” and explain how this concept is applicable to the study of environmental chemistry.
    • Discuss one of the water purification methods you have read about. Include discussion about the physical and chemical principles used in the purification process, any chemicals extracted in the pur…
  • Absolute zero Atmosphere Barometer Diffusion Pressure Calorie Energy Enthalpy Heat System Work Choose at least 2 terms from the list, and answer the following questions: What familiarity and prior kno…
  • I’ll appreciate some explanation as well. Thank you. Use the following information to answer the next question. Diborane is a highly reactive reagent. Diborane reacts with alkynes to form substituted …
  • General Chemistry 2. GENERAL CHEMISTRY 2 LEARNING ACTIVITY SHEET NO. 3 (Module 13-18) Module 13: Molar Mass Determination vis Colligative Property (5 pts) Need helpi SCAN Determine the molar mass of a…
  • How do I solve this? 1. 2. Â. You are a researcher in a lab and for one of your experiments, you make 200 mL of a 1.0 M solution of benzoic acid, CGHSCOOH (pKa = 4.2). Your friend is walking by…
  • General Chemistry 2. Module 17: Factors Affecting Reaction Rate (10 pts) Perform Activity No. 2 (page 47) "provide a documentation on a separate paper Concentration Time (s) until the of Calamans…
  • I’ll appreciate some explanations as well. Thank you. 6. When a piece of strontium is dropped into water, the temperature of the water increases. The statement that correctly interprets this informati…
  • Module 16: Hess’s Law (3 pts) Calculate the standard enthalphy of formation of methane gas, CH4, produced from graphite and hydrogen gas according to the following reaction: C (graphite) + 2H2 (g) →…
  • Explanation will be appreciated. Thank you. Use the following information to answer the next question. Molar Enthalpy of Combustion for different hydrocarbon fuels Methane -802.4 kJ/mol Propane -2040….
  • The equilibrium vapor pressure of water at 32 0C is 0.0476 bar. A glass of water is sealed in a container filled with air at 32 0C. After the water comes to equilibrium with the air in the container,…
  • . Ins CHEMISTRY 1406 H-M Lab Simulation 8 Charles’s Law REPORT SHEET Note: Be sure to include your units! Measure the Changes in Volume of Methane as a Function of Temperature Complete the table bel…
  • How did we get this chart. Reagent Table: Acid Alcohol Name Acetic Acid 3-Methyl -1-butanol Melting Point ( C) 16.6 C -117.2 .C Boiling Point ( C) 118.1. C 131 .C Density (g/ml ) 1.049 0.809 g 0.721 1…
  • HS -1 (aq) + HNO2(aq) ⇌ H2S (aq) + NO2 -1 ( aq)  ÂIdentify the amphiprotic species in the reaction above. Write the balanced complete ionic and net ionic equations where that species reacts as a …
  • Consider the generic Lewis dot symbol for an element. . .X. Which element could this symbol represent?. The violet line of the hydrogen emission spectrum has a wavelength of 410.1 nm. Calculate the en…
  • Ampyra is a drug used to improve walking in patients with multiple sclerosis (MS). The Lewis structure of Ampyra is shown. Howr many bonding pairs and nonbonding pairs of electrons does each carbon at…
  • . A red line is observed at 656.3 nm in the spectrum of atomic hydrogen. Determine the values of n for the beginning and ending energy levels of the electron during the emission of energy that leads…
  • Hydrogen atoms are excited by a laser to the n = 4 state and then allowed to emit. What is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed …
  • Carbon dioxide readily absorbs radiation with an energy of 4.67 x 10’20 I. What is the wavelength (A) and frequency (v) of this radiation? (h = 6.63×10-34 J-s ; c = 3.00×108 m/s) Does this radiation f…
  • HS -1 (aq) + HNO2(aq) ⇌ H2S (aq) + NO2 -1 ( aq)  Determine which acid is stronger and which base is stronger in the reaction above. Then, determine which side of the reaction is favored. Explain w…
  • Please answer the following questions and provide work for the calculations. **balanced equation is 2 Al + 3 CuCl2 —> 3 Cu + 2AlCl3 data from lab: – CuCl2 = 48.8 grams – Aluminum = .93 grams – Cu…
  • explanations will be greatly appreciated. thank you. Use the following information to answer the next question. Ethane was first synthetically created in 1834 by Michael Faraday by the electrolysis of…
  • any help with this and explanation as well. thank you. Use the following information to answer the next question. Corn syrup has a high concentration of fructose, CH1206 (). Fructose has the same numb…
  • explanation will be appreciated. thank you. Bismuth oxychloride is a chemical compound of bismuth, oxygen, and chlorine with the formula BiOCI and exists in nature as the mineral bismoclite. The heat …
  • please help with this. explanation will be appreciated. thank you. 14. Nitrogen is a colourless gas. The molar enthalpy of formation for nitrogen is: (A O kJ/mol B. -21.1 k.J/mol C. -39.5 k.J/mol D. -…
  • A generic Lewis structure is given where Y represents the central atom and the outer atoms are represented by X. The outer atoms are not necessarily all the same element. sea—3a: Which compound is r…
  • Light of varying wavelength hits the surface of a metal. Match each wavelength of light with the observed result. 667 nm 533 nm 461 nm Answer Bank No photoelectrons are ejected. Photoelectrons with a …
  • I will really appreciate some explanations. thank you. Use the following information to answer the next question. Reactions 1 Formation of carbon monoxide AH =-110.5 kJ/mol 2 Formation of nitrogen mon…
  • Give the chemical symbol for the element with the ground-state electron configuration [Ne]3s23p. symbol: Determine the quantum numbers n and & and select all possible values for me for each subshe…
  • Group the elements into pairs that would most likely exhibit similar chemical properties. It does not matter which pair of elements is pair 1, pair 2, or pair 3, so long as the correct elements are pa…
  • Which statement correctly identifies the relationship between the principle quantum number (n), the angular momentum quantum number (I), and the number of nodes for an orbital? Q There are n — 1 to…
  • Please answer the following questions and use the given data in your calculations. #1. Which reactant is the limiting reactant? Show your calculations. – 3 CuCl2 + 2 Al —> 3Cu + 2AlCl3 #2. A stud…
  • it’ll be good to get an explanation as well. thanks for your time. Use the following information to answer the next question. Acetylene is used for oxyacetylene gas welding. Oxyacetylene is the hottes…
  • What are the possible effects of High Salt Diet? Present the evidences of these effects. 2. How did the measurements of these effects came about? 3. What would be the probable take-away applicati…
  • . 1. Explain, in detail, what is wrong with the following set of quantum numbers: n=3,1=2,m =0: name 3p.Include a possible correction. (2 marks) 2. Draw all possible Lewis structures for SeO2. (2 ma…
  • Balance each of the following skeletal equations: (a) Mg ( s ) + O2 (g) → MgO( s ) (b) Zn( s ) + AgNO3(aq) → Zn(NO3)2(aq) + Ag( s ) (c) C2H2(g) + O2 (g) → CO2(g) + H2O(g) (d) C12H22O11( s ) + KC…
  • Â Â 2. Â Â 3. Â. v Two sets ofionizations are shown in the tables below. Complete the tables by ordering each set of ionizations by increasing amount of energyr required. In other words, for e…
  • Using any two metals. or compounds given in the redox table design and draw a labelled eletrochemical cell that produces electrode potential greater than 2 volts. Write the half-reactions and the over…
  • Kathleen has a 50ml PH 3.5 solution of HBr. How much water would she need to add to increase the PH to 5.2?
  • Why would a solution of NaCl be neutral, but a solution of Na2S would be basic?
  • . MISSED THIS? Watch KOV 11.4, /WE 11.6: Read Section 11.8. You can click on the Review link to access the section in your e Text. A cylinder contains 12.0 L of air at a total pressure of 44.4 psi a…
  • Please, help and answers with the appropriate letters. Thanks. Â Part I a) The eyes of certain reptiles pass a single visual signal to the brain when the visual receptors are struck by photons of a w…
  • . MISSED THIS? Watch KOV 11.4, IWE 11.6; Read Part C Section 11.8. You can click on the Review link to access the section in your e Text. Use the ideal gas law to complete the table: Complete the th…
  • Hey please answer fast thank you!. Given: Fe *(aq) + 2 e- -> Fe(s) E – -0.45V Fe (aq) + 3e -> Fe(s) Fe (aq) +em= Ferfaq) E. =+0TV Cl, (g) + 2 e- -> 2 017(aq) E -+1.36 V Calculate " cel f…
  • i just need the Pcolumn in torrs. of the gas, we subtract the pressure of the water column (Pcolumn) from the barometric pres (Pbar): We will work backwards. We start by determining the pressure of th…
  • Data Table Solid potassium bromide (KBr) reacts with aqueous sulfuric acid (H2504) to produce gaseous hydrogen bromide (HBr) and solid potassium hydrogen sulfate (KHSO4). 2) Solid calcium carbonate (C…
  • Calculate the mass percent of Cu(NO 3 ) 2 Â (MM=187.56Âg/mol) in a 0.250M solution. d=1.110g/mL
  • Show the calculations for trial 3 for the following. (record values with appropriate units and significant digits) Â ** WILL BE GREATLY APPRECIATED IF ALL 7 TRIALS CALCULATION IS DEMONSTRATED, if not…
  • #1 and use Matlab.Â. Problem 1 (30 points) Open reaction network. Suppose a reaction network is composed of the following reactions K2 k3 B +C B k5 K6 C 2D 2D D with mass-action rate constants as ind…
  • . <M06 Assignment Chapter 11 + Mixture of Gases Learning Goal: To use partial pressure in gas law calculations. In a mixture of gases, the total pressure of the gas mixture is equal to t…
  • i just need the last blank on what does h equal. 750 To determine the barometric pressure, we measure the height of the mercury column in the barometer as follows: . adjust the level of the mercury po…
  • In your opinion, what is CBRN and What is the chemical category of CBRN?
  • the answers i have submitted are correct. i need the blank ones.. column of Hg that is 760 mm high. \Therefore: 760 mm Hg = 76 cm # Hg = 0.76 m Hg = 1.01325×105 Pa. 9. Commonly used pressure units tha…
  • Answer all. Question 1 (1 point) Saved 3 A (E) B (E) 6 10 : A (B) – B (8) B 8 9 A (8) B (B) concentrations 0.5 A 1 12 20 40 60 80 100 120 Time, t (s) Reactant A and product B reach equilibrium at appr…
  • how many atms is 10.0 cmHg. The difference between the mercury levels corresponds to the hown above is at the 65.0 cm mark of a meter stick and the me ressure of the gas? P= 10.0 cm Hg = 0.0131578947 …
  • . 1. Explain, in detail, what is wrong with the following set of quantum numbers: n=3,1=2,m/=0: name 3p.Include a possible correction. (2 marks) 2. Draw all possible Lewis structures for SeO2….
    • a) Calculate the wavelength (in nm) of the red light emitted by a barcode scanner hat has a frequency of 4.62 × 10 14 Hz. b)ÂA laser dazzles the audience in a rock concert by emitting green light…
  • . Learning Goal: To apply the ideal gas law to problems involving temperature, pressure, volume, and moles of a gas. The four properties of gases (pressure P, volume V, temperature ?’, and moles of …
  • Lithium carbonate is the active ingredient in some medications. Could lithium carbonate be produced in a precipitation reaction?
  • . Charles’s law states that the volume of a gas is directly related to the absolute temperature when there is no change in the pressure or amount of gas: (Figure 1) V1 V2 T T2 Figure < 1 of 1 &gt…
  • The first 2 red lines i need help with. X Chemistry – Ideal Gas Law Const X + newconnect.mheducation.com DEAL GAS LAW CONSTANT N LABORATORY SIMULATION Data – X PHASE 2: Weigh magne y your measurement….
  • Question 8 1 pts What is the energy of the HIGHEST energy conformation of trans-1,2- dimethylcyclohexane? Use the following table to determine the relevant energy. Enter your numerical answer in the a…
  • Question 7 1 pts What is the energy of the LOWEST energy conformation of trans-1,2- dimethylcyclohexane? Use the following table to determine the relevant energy. Enter your numerical answer in the an…
  • CHM 233 Spring 2022 Dr. Trakan X PSU Quiz: Quiz-06 X es/108018/quizzes/849038/take What is the energy of the LOWEST energy conformation of the following compound? Will/ Me Me Use the following table t…
  • . Problem 1 (30 points) Calculate the ionic conductivity and the cation transference number of following electrolytes based on lecture slides. Assume that mobility does not change with concentration…
  • Question 3 1 pts From Questions 1 and 2 above, what is the DIFFERENCE of energy of the highest energy conformation and lowest energy conformation of 2,4-dimethylpentane, looking from C2 to C3? Enter y…
  • essay should be of 500 words only Â. a)Create an ecltrochemical cell using any 2 metals or use compound that reduces a potential of 2 to 4 volts. b)Write an essay on application of galvanic cell incl…
  • An excited state of carbon, [He] 2s2 2p13p1, has the following terms: 1D, 3D, 1P, 3P, 1S, and 3S. What are the possible levels for each of these terms? 2. The ground configuration of a Ti2+ ion is …
  • D Question 2 1 pts What is the energy (in kcal/mol) of the HIGHEST ENERGY conformation of 2,4- dimethylpentane, looking from C2 to C3? Enter your numerical answer in the answer box below. Do not inclu…
  • . For a certain amount of gas at constant temperature, the pressure and volume have an inverse relationship (Figure 1). This is called Boyle’s law: RIV = P2V2 Figure < 1 of 1 > Larger volume S…
  • Question 1 1 pts ts What is the energy (in kcal/mol) of the LOWEST ENERGY conformation of 2,4- dimethylpentane, looking from C2 to C3? Enter your numerical answer in the answer box below. Do not inclu…
  • Calculate the volume of a 0.750M Sodium hydroxide solution required to titrate 25.00 mL of a 0.873M acetic acid solution Calculate the volume at a 0.750M sodium hydroxide solution required to titrate …
  • Please help me with this. INTRODUCTION LABORATORY SIMULATION Lab Data – X Mass of magnesium (g) 216 Moles of magnesium (mol) Temperature of water (C) Temperature of water (K) Vapor pressure of water (…
  • . Which metal in the activity series is oxidized with a Sn solution but not with a Fest solution? Express your answer as a chemical formula.
  • Could you please demonstrate how to do this step by step for me? If the question is illegible, it is down below: Calculate the pH of a 0.30 M CH 3 COONa solution. Hint. Use the K a for CH3 COOH. The a…
  • Write the net ionic equation for the aqueous reaction of lead(II) nitrate and potassium chromate. Remember to have the equation correctly balanced and indicate the phase of all reactants and products….
  • Could you please demonstrate how to do this step by step for me? If the question is illegible, it is down below.: What is the H + ion concentration of a 0.010 M NaCN solution? The Answer is 2.2 x 10 ^…
  • For each acid shown, draw the structure of the conjugate base. Circle the stronger acid. Briefly explain your reasoning in 1—2 sentences. (The acidic proton is underlined). c) HN-OH HO- VS.. d) O F…
  • Calculate the composition of the following solution in mass/volume %: Â 18.0 g acetic acid dissolved in 3.00 L solution
  • Find the mass, in grams, of a 265 mL sample of dry air at a pressure of 755 mmHg and a temperature of 19°C. 2. An unknown gas sample is collected in a 265 mL container at 27.0°C and 758.1 m…
  • . EXi Consider the following reaction My (OH) 2 c) – My way) + OHcaps a) A solution is prepared by dissolving 20. got solid Ma (OH)2 in 200.0 ml solution. Calculate The Molarity of The MacoHilz Solu…
  • Which of the following solute(s) would form an electrolytic solution in water?   A. CH 4  B. KI  C. FeCl 3
  • Freshly chemically-produced substances (esp. gases such as (di)hydrogen, H 2 ) are well-known by experimental & synthetic chemists to quite often be significantly more chemically reactive than are…
  • . Question 1 (1 point) Saved 3 A (E) B (E) 6 10 : A (B) – B (8) B 8 9 A (8) B (B) concentrations 0.5 A 1 12 20 40 60 80 100 120 Time, t (s) Reactant A and product B reach equilibrium at approximatel…
  • . At this point, continue assessing your learning by accomplishing the activity below. Enrichment Activity: "The Scientist Got Talent". Compose a poem or a song (indicate the tune), at lea…
  • General Chemistry  Â. MctivitJ.r 1- Travelling Water Experiment! Property of Liquid and their Intermolecular Forces-The concept of the following experiment can be used in our day to day activitie…
  • A reaction has an activation energy of 3.8 kJ/mol. If the rate constant is 0.096 s-1 at 463 K, what is the rate constant at 825 K?   6. Suggest a reasonable two-step mechanism for the overall…
  • A plot of ln[N2O5] vs. time yields a straight line and has a slope of -9.8 x 10-4 s-1. If 0.350 mol of N2O5 is added to a 1.0 L flask at 35⁰C, calculate the concentrations of N2O5, NO2, and O2?…
  • How many atoms are present in 0.525 mol of platinum (Pt) atoms? Group of answer choices  a.6.02 × 10 23  b. 8.72 × 10 -25  c. 3.16 × 10 23  d. 1.15 × 10 24
  • Use principles of bonding, intermolecular forces, and/or Coulomb’s law to explain the following experimental observations: 1. The melting point of CaO is higher than the melting point of NaCl. 2. The …
  • Your Research 5. Choose 4 elements from your research that you believe have the best chance to replace tin. List them below. 4. Congo, Conflict, Chemistry, and Cans: Day 11 Research Part I To repla…
  • . cvg.cengagenow.com arch G Chapt. 16 HW OWLV2 | Online teaching and le.. S A solution contains 0.274 M so. [Review Topics] [Reforon Use the References to access important values if need Which of th…
  • Estimate the enthalpy change for the balanced reaction given below, using the bond energy information given. Bond Bond Energy (kJ/mol) C – H 413 C – C 348 C = C 602 O – O 146 C2H4 + 3 O2 🡪 2 CO2 + …
    • Draw the Lewis structure of the ICl4- ion. B. What is the molecular geometry of this molecule? C. What is the electron domain geometry of this molecule? D. What are the bond angles of this molecule…
  • Draw the Lewis structure of the ozone molecule (O3). B. For the central oxygen atom, how many sigma bonds and how many pi bonds are formed? C. What hybridization does the central oxygen atom use? D…
  • . PROCEDURE PART A: Determination of the specific heat of metallic copper (pennies) 1. Start boiling some water in a pot. Make sure the pot will allow you to stand up a beaker with the metal in it. …
  • . d cvg.cengagenow.com ogle Search G Chapt. 15 HW " OWLV2 | Online teaching and le. S A solution contains 0.274 M so… U clas.sa.ucsb.edu/staff/Resource.. [Rovlow Topics] [References] Use the …
  • . cvg.cengagenow.com C CIO – Google Search G Chapt. 15 HW OWLV2 | Online teaching and le.. S A solution contains 0.274 M so.. U clas.sa.ucsb.edu/staff/Resource. C pKa Values for Organic and Inor. [R…
  • I don’t understand How many g of solute are needed to prepare the following solution?   2.50 × 10 2 g of 3.00% (m/m) Na 2 CO 3
  • ColumnÂ#7ÂisÂtoÂbeÂcalculatedÂasÂtoÂexpressÂtheÂsolubilityÂofÂKClÂinÂgramsÂperÂ100ÂgramsÂofÂwater.FollowingÂtheÂequationÂgiven,completeÂcolumnÂ#7ÂforÂeachÂgroup’sÂdata. mas…
  • Having trouble understanding the process for calculating the composition of each of the following solutions in mass/volume %. Be sure to answer all parts.  (a)28.7 gsugar, C 6 H 12 O 6 , in5.00 × 1…
  • A 50.0 mL portion of a 0.999 M sucrose solution was diluted to 5.00 × 10 2 mL. What is the molar concentration of the resulting solution?
  • Can you please show me how to do this step by step? If the question is unreadable, here it is: What is the pH of a 0.20 M solution of NH4Cl? [Kb(NH3) = 1.8 × 10^-5] The correct answer is 4.98. 93. Wh…
  • Can you please show me how to do this step by step? If the question is unreadable, here it is: Morphine, C17H19NO3, is often used to control severe post-operative pain. What is the pH of the solution …
  • Can you please show me how to do this step by step? If the question is unreadable, here it is: What mass of ammonium chloride must be added to 250. mL of water to give a solution with pH = 4.85? [Kb(N…
  • The conductivity of distilled water is 6u/S/cm The conductvity of NaCI is 6000 uS/cm The measure of the conductivity of a solution and the results is 15 What type of soluble compound does your solutio…
  • Calculate the number of equivalents/L of Ca 2+ in a solution that is 4.3 × 10 −2 M in Ca 2+ . Express your answer in scientific notation.
  • Calculate the % (m/m) of argon gas in a mixture containing 60.0 g of argon gas and 60.0 g of helium gas.
  • A 50.0 mL portion of 0.500 M NaOH was diluted to 469.6 mL. What is the new molarity?Enter youranswer in the provided box.
  • Stock solution concentration Concentración of KI 7.88×10^-4 Concentración of C6H8O6 0.01M Concentración of H2O2 0.88M. *Graphing Part A Finding the initial moles: The number of moles of each reacta…
  • Calculate the number of g of NaCl in6.50 × 10 2 mL of a12.0% solution
  • Table 2. Specific Heat Data Trial 1 Time Trial 1: Trial 2: Time Trial 2: Trial 3: Time Trial 3: (minutes) Temp ("C) (minutes) Temp ("C) (minutes) Temp ("C) Metal: Initial 95 C Metal: In…
  • REACTION KINETICS: THE ESSENTIALS video link: https://youtu.be/XgQAXHCGjmQ 1. Describe the overall objective and make a hypothesis 3. Summarize the steps taken in the simulation 5. Discuss the conclus…
  • Pseudo steady-state hypothesis in pyrolysis chemistry (previous CHE 430 exam problem) At very high temperatures, acetone (C3HO, A) decomposes to methane (CH4, B) and ketene (CH2CO, C) C3H60 -> C…
  • Please answer all parts abcdef thank you so much. 14 IX. [43 Points] Table 3.1 Bond Dissociation Energies of Various A-B Bonds in the Gas Phase [DH" in kcal mol"’ (k.J mol" ")] BIn…
  • Can you help me? I’m doing Spectrophotometric Determination of Kc lab. I don’t think you would need table 3, but I’ll just put it there in case.Â. Part C: Collect Equilibrium Data to Create ICE Table…
  • please explain and give correct answer. H the w. group also cuse a bathechromic shift, even though they are devoid ofp-ora-electrons ") Ethyl d) Methyl
  • Data: Trial 1 1.9 mL of H20, 0.8 mL of 1.0 M HCl, 0.8 mL of 2.724 M of acetone, 0.5 mL of 0.005 M I2 Solution Trial 1 = 225 seconds Trial 2 1.9 mL of H20, 0.8 mL of 1.0 M HCl, 0.8 mL of 2.724 …
  • When tightening a bolt, you push perpendicularly on a wrench with a force of 165 N at adistance of 0.140 m from the center of the bolt. (a) How much torque are you exerting in newton × meters (relati…
  • Consider the following reaction: 2 N 2 O 5 (g) →  4 NO 2 (g) + O 2 (g) The initial concentration of N 2 O 5 was 0.48 mol/L, and 25 minutes after initiating the reaction, all of the N 2 O 5 h…
  • . Assuming there is no change in volume, determine the molarity of the acid solution if a 3.12-L sample of hydrogen chloride gas at 2.57 atm and 37.5C, which is completely dissolved in a 500 mL of w…
  • . What is the molality of the solution that contains 65 g of sucrose (C12H22011) dissolved in 300g of water?
  • An acid spill occurred at a metal processing plant in which a vat of hydrochloric acid ruptured spilling 30 000 L into the surrounding soils. The acid from a soil sample was extracted and analyzed by …
  • . A mixture of nitrogen gas and oxygen gas is collected by displacement of water at 30 C and a pressure of 750 torr. If the partial pressure of nitrogen is 580 torr, what is the partial pressure of …
  • The Projects in this course require special materials that you will heed to provide. Before doing a project, gather all the items you will need for that specific project and lay them out on a clear wo…
  • Watch the video and answer in a pre-lab and inlab format on bonding. https://www.youtube.com/watch?v=qZW_6Ev0AXc  Lab report guide: https://www.uhscienceresource.com/chem111x-prelab-template  …
  • Convert the mass of that ingredient to particles. Calculate how many Aleve molecules there are in one tablet molar mass
  • On the basis of the element’s location in the periodic table, indicate what simple ion each of the foll a. Se Formula: b. F Formula: c. Ca Formula: Submit Answer Try Another Version 9 item attempts re…
  • on a day when atmospheric pressure is 76 cmhg, the pressure gaugage on a tank reads the pressure inside to be 400 cmhg. the gas in the tank has a temperature of 19 • c. if the tank is heated to 41 ?…
  • Watch the video and answer the following questions. Â https://fb.watch/aQg7L5XmnA/ What are the experiments done in the video? What are the gas laws? Write the formulas and principles.
  • Watch the videos and answer the following questions. 1. https://fb.watch/aQeJj14Dt8/ 2. https://fb.watch/aQffZjRHwT/  What is the element/compound used in the video. What is the container? What …
  • i prapared two samples of ascorbic acid (100mg/mL) to investigate its degradation. After storing them for a week now I’d like to determine the ascorbic acid concentration by titration and UV. Can you …
  • Using the findings of Paul & Sun (2018), make a table that summarizes the decreasing order of these lubricating agents (magnesium stearate, sodium stearyl fumerate and stearic acid) in terms of th…
  • please pay attention to sig figs thank you. A certain liquid X has a normal freezing point of – 8.00 .C and a freezing point depression constant K = 5.24 .C.kg.mol . Calculate the freezing point of a …
  • . Part II: Trace the Reaction! A. Directions: Trace the nuclear reactions happening in an average star during proton- proton chain reaction by completing the following nuclear equations. Answer the …
  • [References] a. Without looking at the periodic table, choose the elements which are halogens. (Select all that apply.) Br O CI O At O germanium O Ag boron b. Without looking at the periodi…
  • [References] a. Most of the elements are solids at room temperature. Choose the example(s) of elements that are liquids near room temperature. (Select all that apply.) mercury zirconium Sub…
  • Referer To which element does the following electron configuration correspond? a. Is 2s2 2p63s23p6 4s23d10 4p germanium O arsenic O selenium O krypton O gallium O bromine b. Is2 2s2 2p63s23p6 4s23d2 O…
  • [References] a. Using the symbol of the previous noble gas to indicate the core electrons, choose the electron configuration for the element cobalt, Z = 27. [Ne]3s2 3p6 3d7 4s2 [Ar] 3d7 4s2…
  • [References] a. How many 3d electrons are found in the element manganese, Z = 25? O seven O six O five b. How many 3d electrons are found in the element zinc, Z = 30? O twelve O eleven O ten c. How ma…
  • Give some similarities that exist among the elements of Group 1. The Group 1 metals: (Select all that apply.) have high density have low density are hard metals are soft metals are highly reactive for…
  • [Referenc Consider the bright line spectrum of hydrogen shown in the figure below. 410 nm 434 nm 486 nm 656 nm Hydrogen Line Spectrum. When excited hydrogen atoms return to lower energy sta…
  • [References] a. Using the symbol of the previous noble gas to indicate core electrons, choose the valence shell electron configuration for chromium, Z = 24. O [ Ar] 4s2 4p O [Ar]4s’ 3d5 [Ar…
  • [References] a. For atomic number 13, use the periodic table to write the formula (including the charge) for the simple ion that the element is most likely to form. Formula: b. For atomic n…
  • lons would form with Cs, Bast, and Als+ ions. a. For the negative lon OH, use the concept that a chemical compound must have a net charge of zero to predict the formulas of the simple compo…
  • [References] a. Write the simplest formula for a compound containing one iron atom for every three chlorine atoms, listing the elements in the order given. b. Write the simplest formula for…
  • [References] a. Without referring to your textbook or a periodic table, choose the full electron configuration for the element with the atomic number Z = 16. The full electron configuration…
  • [References] a. Choose the shorthand valence shell electron configuration of germanium, Z = 32, basing your answer on the element’s location on the periodic table. [Ar] 4s2 3d10 4p] [Ar]As2…
  • [References] In each of the the following sets of elements, choose which element has the smallest atomic size: a. Bi, As, N O As ON O Bi b. Sn, Te, Sr O Sn O ST O Te c. At, I, Br O At OI O …
  • a. How many valence electrons does an atom of rutherfordium, Z = 104, have? O three O five O four b. How many valence electrons does an atom of iodine, Z = 53, have? O one O five O seven c….
  • Can you please explain how to do this step by step? Thanks. If the question is not showing in the picture here it is: “Suppose that ammonia, applied to a field as a fertilizer, is washed into a farm p…
  • For a given aqueous solution, if [H30*] = 7.92 x 1073 M, what is [OH ]? 10. For a given aqueous solution, if [H30*] = 2.07 x 10 11 M, what is [H30+]? 11. For a given aqueous solution, if [OH ] = 1….
  • A solution of NaOH (40gr/l) was prepared for titration. Titration of 10.0 ml of HBr solution of unknown concentration required 1.6 ml of the prepared alkali solution. What is the molar concentration o…
  • Draw calculations for determining the concentration (M) of NaOH M hcl × v hcl = M NaOH × v NaOH   Â(knowing that the concentration of hydrochloric acid = 1 mol / liter)
  • When the calibration graph was prepared it was assumed that essentially all of the HSCN present was combined with Fe^3+ to form the complex ion. Use the average value for Kc that you determined, and c…
  • What does the calculated value of the equilibrium constant, Kc, indicate regarding the degree of completeness of the reaction? In other words, at equilibrium, are there mostly products, reactants, or …
  • . A. Write the equilibrium constant expression of the ff. reactions: 1. 2KCIO3(s) <> KCI(s) + 302(2) 2. C(s) + H20) <> CO2g) + H2(g) 3. 2Cl2(g) + 2H20(g) <> 4HClg) + 02(g) 4. NHACl…
  • In your laboratory report, show a sample of each type of calculation. Explain what is meant by an equilibrium constant. Was the value constant for all your experiments? Should it be constant?
  • (C13 1802) per tablet. Calculate how many ibuprofen molecules there are in one tablet. Molar mass of ibuprofen is (13×12)+(18×1)+ (2×16)=206g/mol 200 mg x (10-3 g/mg) x (1mol/206g) x (6.02 x 1023 mole…
  • Never answer unless you have solved all 4 Exercises.  It shouldn’t be just an answer. Must include a problem-solving process  Ignoring this warning and posting one or two answers will add you to…
  • . A certain reaction has an equilibrium constant of 10.1 at 25 C A &B What is its AG, in kJ/mol, if [A]=0.05 M and [B]=1×10-4 M?
  • Construct graphs of mass loss against time at the two concentrations for the marble chips. 2. Using your graphs for both 2.0 M HCl and 1.0 M HCl in question 1, calculate the average rate of mass …
  • Improvements: 1. Give one example of a problem with the procedure that would affect the results/observations obtained in this experiment. 2. Give a description of what you would change in the proced…
  • . Information Hydrazine was used during World War II as a component of rocket fuel. The structural diagram of hydrazine is Flag question H H N-N H H Question 12 True or false: The shape of the ab…
  • . Question 1 True or false: Molecular compounds are formed by the sharing of electrons between ions. Not yet answered Select one: Marked out of True 1.00 False Flag question Question 2 True or…
  • Introduction The Introduction for the Report must be a MINIMUM of 300 words. The Introduction must include an explanation of at least two relevant chemical concepts involved with this experiment as we…
  • Aim Write a clear relevant aim for this experiment.
  • Improvements 1. Give one example of a problem with the procedure that would affect the results/observations obtained in this experiment. 2. Give a description of what you would change in the procedure…
  • . Question 1 What is the underlying, fundamental force for the formation of all chemical bonds? Not yet answered Select one: Marked out of 1.00 A. The need for atoms to have a full valence Flag q…
  • 1 . Determine the ka for the ionisation of 0.1m of ammonium chloride solution. pH of ammonium chloride = 7Â 2. Determine the ka of NH4CL- (aq)+ H2O —> NH4+ + Cl- Â Â Â Â Â Â Â Â Â Â Â…
  • . SCIENCE 8- 3RD QUARTER ANDWIL WEEK 1: Competency: Explain the properties of solids, liquids and gases based on the particle nature of matter. Activity 1: Which is matter, which is not? Directions:…
  • Hello please be mindful of the given At. mass thank you!. 1. In gravimetric analysis of chloride by precipitation, a 0.4000 g impure sample of a sodium chloride was treated with an excess of AgNO;, th…
  • Can I have some help please for following standards preparation: a. 0.1880 M Co(NO3)2 solution from the hexahydrate. b. 0.0500 M Cr(NO3)3 solution from the nonahydrate Using the above two standards, p…
  • For the first part of a Lewis Dot structure of sulfuric acid, H2SO4, why don’t we use single bonds around the sulfur?
  • Explain please how do I do a equation Âfor the dissolution of each precipitate in table 6 that is soluble In CH3COOH. Â Â. N.R. NazC204 N.R. wt. ppt. soluble wt. ppt. insoluble N.R. XX wt. ppt. ins…
  • please help me tutor Â. PROBLEM SOLVING: Solve the following problems. 1.) Calculate the boiling and freezing point of a solution prepared by dissolving 68 g of glucose, CH1206, in 800 g of water? N …
  • . Answer the following questions on Kw. Show your solution. Write your answers on intermediate pad paperXsmall-sized typewriting pa per. Write legibly and no erasures. Final answers must be encircle…
  • CHEMICAL REACTIONS 3/5 Percent yield of chemical reactions Liquid hexane (CH3 (CH2) CH, reacts with gaseous oxygen gas (2) to produce gaseous carbon dioxide (CO2) and gaseous water (HO). If 4.28 g o…
  • Explain please . I dont know how to write this in NET IONIC EQUATION Âfor each reaction that produced a precipitate.Â. 4. Using the data in Tables 5 and 6: (1) Write the complete ionic equation for …
  • General Chemistry 2. Module 10: Colligative Properties of Nonelectrolyte Solutions and Electrolyte Solutions (5 pts) Arrange the following according to increasing boiling point, freezing point, and va…
  • General Chemistry 2. Module 7: Different Ways of Expressing Concentration of Solutions (5 pis) 1. Solution A solution is prepared by dissolving 5.02 g of KNO, in 95.0 g of water. Calculate the mole fr…
  • Answer ALL the questions exactly and correctly also show your work! Â. 1. The unit cell of an ionic crystal always contains equal numbers of positive and negative charges. Select true orfalse: 0 True…
  • The solution reaction is endothermic exothermic (Underline correct answer.) Give your reasoning. Solid unknown no.
  • read the situation and answer the following. the subject of this in our school  Basic occupational safety and health  Â. Situation: . An empty glass vessel is to be placed on top of the table. …
  • . Enter the net ionic equation for the reaction between INO, (a weak acid) and NaOH. Express your answer as a net ionic equation. Identify all of the phases in your answer.
  • Which of the following is a product from the reaction of 1-ethylcyclopentene with N -bromosuccinimide (NBS ) and light . Br b) c) Br d) a, b and c are all products from the reaction Br
  • But what are the net ionic equation. What you did is COMPLETE IONIC EQUATION but what are the NET IONIC EQUATION?
  • Percent yield of chemical reactions Gaseous butane (CH3 (CH2),CH, ) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (HO). If 1.33 g of water is produced f…
  • IViaSS OT IVIass Of Crucible T empty crucible + Mg product Trial crucible (g) (g) (g) Trial 1 46.42 46.697 46.86 ….. Trial 2 43.57 43.863 44.027 Trial 1 41.61 41.89 42.02 Trial 2 44.94 45.21 45.38 T…
  • . Enter an equation for the precipitation reaction that occurs (if any) when solutions of potassium hydroxide and magnesium bromide are mixed. Express your answer as a chemical equation. Identify al…
  • Fill in the appropriate coefficients where needed to ensure that the equations are balanced.  Â1) Na + Cl2 > NaCl 2) KOH + HCl > KCl + H2O 3) H2SO4 + Al(OH)3 > Al2(SO4)3 + H2O 4) Li …
  • . Question 1 When an ionic compound forms, its properties are Not yet answered Marked out of A. similar to the properties of the metallic element in the compound 1.00 O B. similar to the properties …
    • Calculate the amount of NaCl and CaCl2 needed to bring the freezing point of 1.5 L water below 3.0 .C . The Kf of water is 1.86 1/C*mc and the density is 1 g/ml.
      • Use the following data to identify the rate law for the nighttime decomposition of NO2. Please include the calculate rate order and rate constant. Exp. [NO2] (M) Rate (M/s) 1 3.5×10-4 2.82×10-8 2 2…
    • Use the following data to identify the rate law for the daylight decomposition of NO2. Please include the calculate rate order and rate constant. Exp. [NO2] (M) Rate (M/s) 1 3.5×10-4 2.57×10-5 2 2….
  • . Question 1 Essentially, all bonds and forces are a result of electrostatic attractions betwee charges. Not yet answered positive and positive positive and negative Marked out of 1.00 negative and …
  • Exercise 4 4.4 Show by carrying out the appropriate integration that the total energy eigenfunctions for the harmonic oscillator , (x) = ")e-axt /2 and 1/4 42 (x) = (2ax2 – 1)e-*x /2 are orthogon…
  • Exercise 4 4.3 Show that 2(x) = (*) 1/4 (2ax2 – 1)e-ax /2 is normalized over the interval -co < x < co.
  • how many of the following are pure substances?. How many of the following are pure substances? (Check all that apply.) water air carbon brass gold ammonia
  • ) mass of crucible after first heating: ) mass of crucible after second heating: 1) mass of magnesium sulfate hydrate: ) appearance of magnesium sulfate hydrate: mass of crucible + anhydrous salt: () …
  • = O CHEMICAL REACTIONS Em Percent yield of chemical reactions 1/5 Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium chloride (NaCl) and liquid water (…
  • What is the initial mass of the hydrate? 0.192 g What is the final mass of the hydrate? 0.096 g What is the mass of water in the hydrate? 0.096 g How many moles of water are in the hydrate? 0.00533333…
  • CHEMICAL REACTIONS 0/5 Percent yield of chemical reactions Liquid octane (CH3 (CH2) CH3 ) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H, O). If 2.7…
  • Activity II – EXPERIMENT 1. Obtain a small amount of each stock solution into small beakers (be sure to keep track of which beaker contains each solution). You only need a small amount of reagent – do…
  • In this experiment, the plotted data points for each graph could give you a linear trendline with either an R2 = 1 or an R2 #1. Explain the meaning of the R value and how it is possible to get eith…
  • Periodic Table of the Elements 18 2 13 14 15 16 17 H H HG H Metals Metaloids Nonmetals 3 4 5 6 7 B 9 10 11 G 12 A E F E C D
  • Activity IV – EXPERIMENT Throughout this activity, you should use the improvements to technique just discussed in the previous activity. The goal is to get more reliable data than the first…
  • How many signals would you expected in the ‘H NMR of the following molecules? (10 marks) Br (a) (b) (c) Q2. Give the number of peaks expected in the ‘H NMR for the indicated protons in each of the…
  • Using your data from trials 1 through 3, generate a Log-Log plot to determine the reaction order for Feet. Refer to the introduction for information on generating Log-Log plots. The reaction order …
  • Note: For all calculations, clearly show your work and units. 1. Write the rate expression for this reaction that includes your experimental m, n, and k values. 2. What are the units on the rate const…
  • What is the mass percent of a solution of 7.6 grams sucrose in 83.4 grams of water ? 2. How many grams of sucrose must be added to 375 grams of water to prepare a 2.75 % by mass solution of sucrose…
  • Activity@al puzzle Instructions ARealish Guppyovidald ninthBond atqchysipchemistiterbs Que theeyesaspyraned Jdomen(idcane ) )vithasiveissuesontrustingAcus lisacry ike helyuggusesspotterintheoveneyesti…
  • A sample of argon gas occupies a volume of 7.39 L at 60.0°C and 360. torr. If the volume of the gas sample is decreased to 6.33 L, while its temperature is increased to 118.0°C, the resulting gas pr…
  • Status: Not yet answered | Points possible: 1.00 Suppose you are titrating a solid mixture containing KHP (molar mass=204.2 g/mol) and a salt compound. KHP reacts with NaOH according to the equation K…
  • . C6H12 + 4 Br2 C6HgBr4 + 4 HBr Molar mass = 84.1 159.8 399.7 80.9 g/mol Based on the above equation, calculate the theoretical yield and percent yield of C6HsBr4 for an experiment where 15.0 g of C…
  • Determine ka of diluted and undiluted ammonium chloride. pH of diluted solution=6, pH of pure solution =7 and the concentration of the ammonium chloride used is 0.10M.
  • what is the importance of calorimetry in real life and solve the. 2. When 10.0 g KOH is dissolved in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 25.18 "C to 47.53 C. …
  • Compare the class average and its uncertainty to the literature value for the pK_{In} In ​ of bromothymol blue. Are they consistent? If not, suggest one reason why they may not be. Class average:-…
  • Write the molecular equation and net ionic equation for the reaction of hydroiodic acid and potassium hydroxide. Include phases (states). Enter the formula for water as H2O. Â molecular equation: net…
  • Trial 2 shows a 1.510 gram sample of copper chloride dihydrate (MW = 170.48). What mass would we expect to remain if all the water is heated off?
  • Calculate the Ka of ammonium ions of undiluted and diluted ammonium chloride. Ph of diluted ammonium chloride = 6, Ph of undiluted chloride = 7 and the ammonium chloride concentration is 0.10M.
  • How to find the ka of ammonian chloride and diluted ammonium chloride? if the concentration of the ammonium chloride is 0.10M and Ph of ammonia pure = 7 , pH of diluted ammonia= 6
  • What is the energy of a photon from the infrared laser mentioned in the question above? a. 1.945 x 1014 J b. 1.289 x 10# j C. 1.986 * 1025J d. 6.626 * 1031 ] e. 1.021 x 10-39 J 4. Which of the foll…
  • The following mechanisms have been proposed for this reaction: Mechanism I Step 1: N:O,(g) > NO,(g) + NO.(g) slow time, min [N205], M Step 2: NO:(g) + N:O.(g) > 3NO.(g) + 0(g) fast 0.1 Step 3: N…
  • Ignoring the use of distilled water, calculate the theoretical mass of the final product   Step 1: List Given Mass (m), and Molar mass (M, from periodic table), and find the number of moles fo…
  • 2C2H2 + 5O2 ⟶4CO2 + 2H2O 1,How many moles of oxygen are needed to produce 7.3 mol of carbon dioxide? 2. If 9.7 moles of water is produced, how many moles of C2H2 were used?
  • What information do we need to calculate the molarity of a sulfuric acid solution?
  • . (I) We know that energy eigenvalues of a harmonic oscillator are En = hw (n+ ? When the system is in its ground state n = 0 and the corresponding energy is the "zero-point energy". From …
  • Suppose you have 30 grams of ice (at OoC) and you want to heat it up. What is the maximum temperature you could reach if you provided 15kJ of energy? C(s) = 2.01 J/goC, C(1) = 4.19 J/goC, C(g) = 2.01 …
  • How many grams of titanium (III) hydroxide, Ti(OH)3, will contain 4.32 x 1025 hydroxide ions? Work through the steps to get to the final answer. a) From the number of hydroxide ions given, calculate h…
  • Which substance is the limiting reactant, and what is the theoretical yield, when 34 g of sulfur reacts with 54 g of oxygen and 68 g of potassium hydroxide according to the following chemical equation…
  • A sample of barium chloride weighing 20.5g was dissolved in enough water to make a solution with a concentration of 0.175M. What is the volume of the solution (in mL)? 1.
  • . (IV) Consider two CH4 molecules between which there is only van der Waals force. In the infrared spectrum, the lowest frequency is observed at 32 cm_1. Using the quantum harmonic oscil— lator mo…
  • please tell me the formal charges. Table 15.4 below, providing the suggested number of structures for each molecule. Normal Molecule Formal Charges CaH O (Isomer 1) CH 0 = CH O (Isomer 2) H= CE 0 = SO…
  • Give the empirical formula of a compound that is composed of 91.75 % N and 8.25 % H. Calculate the moles of N= mol N Calculate the moles of H = mol H What number must you multiply each ratio by in ord…
  • please tell me the bonding and non bonding for these.. Of the compounds in Table Lsiz and comple Bonding e Clouds on Central Non-Bonding e Clouds on Atom Central Atom CO2 (2 double bonds) Cl2CO (1 dou…
  • Need answers and work please it’s 7.05 Gas stoichiometry sheet. 2 CO 8) Find out what mass of CaSO, must have been present initially in order for a factory to produce 1.39×10- L of SO, gas at a temper…
  • Need answer and work please it’s 7.05 Gas stoichiometry sheet. 7) This reaction generates 7.70 L of oxygen at a temperature of 18.7"C and a pressure of 0.92 atm, what mass of KCIO, must have deco…
  • Calculate the amount of energy involved when 72 grams of water is cooled from 60oC to -10oC, given C(s) = 2.01 J/goC, C(I) = 4.19 J/goC, C(g) = 2.01 J/goC, enthalpy of fusion = 6.01 kJ/mole, enthalpy …
  • Need answers and work please It’s 7.05 Gas stoichiometry sheet. 6) When 2,400 mg zinc is added to hydrochloric acid, 450 mL of hydrogen gas forms at a temperature of 30"C. What is the pressure of…
  • . Vibrations of molecules can be approximated by a harmonic oscillator onl}r near the mini- mum of the binding potential curve, i.e., for small amplitudes for Vibrations. Much better description is …
  • Need answer and work please 7.05 Gas stoichiometry sheet chemistry. 5) Determine the pressure (in mmHg) for the nitrogen gas sample that is collected when 53.0 g of NaN, decomposes. The temperature of…
  • Â 2. Â 3. Â 4. Â Â. V Two sets Dfionizations are shown in the tables below. Complete the tables by ordering each set of ionizatinns by increasing amount DfEnEI’gY required. In other words, for…
  • Need answers please 7.05 Gas stoichiometry sheet. 4) What volume of hydrogen gas is evolved from a reaction between 0.69 g of Na and water? The gas is collected at 22."C and 790 mmHg. Na (s) +_H2…
    • When 66.4 g nitrogen and excess oxygen react, nitrogen dioxide is generated. If the NO, is collected at 635 K and 0.722 atm, calculate the volume will it occupy (in L). N2 (g) +_Oz (g) – _NO. (g)
  • . (V) Consider a 1H35 Cl diatomic molecule forms a two-body system constrained only under mutual interactions between the hydrogen atom and the chlorine atom. Because 3501 atom is 35 times more mass…
  • When 66.4 g nitrogen and excess oxygen react, nitrogen dioxide is generated. If the NO, is collected at 635 K and 0.722 atm, calculate the volume will it occupy
  • Need answers and work please it’s 7.05 Gas stoichiometry sheet. 2) This reaction uses 24.1 g of copper()) sulfide. Determine the volume of sulfur dioxide gas that would be collected at 237 C and 10.7 …
  • Based upon the following: Gypsum is the hydrate of calcium sulfate, CaSO 4 · 2 H 2 O. It is the primary material in sheet rock, used to make walls in houses.  A) How many atoms of all kinds are…
  • what is the molecular formula of a compound given that the molar mass is 165 g and empirical formula is C3H5
  • MY N There are many commercial products containing ionic compounds. For each of the given compounds, write the unit formula. (a) sodium hypochlorite (bleach) chemPad Help Greek – (b) sodium hydroxide …
  • what is the mass percent of Hy in Hy(NO3)2? Hy is a hypothetical element with a mass of 18g/mol
  • when building a calorimeter why is it important to wrap the outside? a) this will help insulate the calorimeter b) this will help reflect heat back into the calorimeter c) the reactants (baking soda a…
  • mass of the hydrate 0.192 g final mass of the hydrate 0.096 g mass of water in the hydrate 0.096 g Âmoles of water are in the hydrate 0.00533333 mol Answers to 3,6,7,8,9, and 10 Â. 0/ 2 10. Take a l…
  • 3 g of sodium bicarbonate is reacted completely with 1.02 kg of vinegar. The starting temperature of the vinegar is 25.4 ºC . What would the final temperature of the reaction solution be in ºC af…
  • how many grams of difluroine trioxide are in 3.50 x 10^24 molecules
  • if 4.03g if methane (CH4) is burned entirely, and all the heat from this combustion is absorbed by 1.06kg of 20.00 degree celcius water, what would the final temperature of the water be after the comb…
  • . PrelabVidProbeware – x Search Results | Cours x Intro to Probeware La > > The temperature at w| X Intro to Probeware Pr X VitalSource Bookshelf X C Chegg Search * + X C & https://anokara…
  • . CHM 120 Prelab: intermolecular forces 1. Does a molecule with a large viscosity have stronger or weaker IMF? Explain. 2. What does a shorter evaporation time indicate about the IMF present in a sa…
  • what is the mass percent NaCI in the solution? What is the molarity of the solution? 6.00g of NaCI 102.80g is mass of sol’n
  • Need answers please it’s chemistry stoichiometry. 4) What volume of hydrogen gas is evolved from a reaction between 0.69 g of Na and water? The gas is collected at 22."C and 790 mmHg. Na (s) +_ _…
  • Need all answers please. 2) This reaction uses 24.1 g of copper(I) sulfide. Determine the volume of sulfur dioxide gas that would be collected at 237 C and 10.7 atm. CuzS (s) +_Oz (g) – _CuzO (s) +_so…
  • . come to Student F X Gradebook x Chemistry – Determin X y! quillbot – Yahoo Searcaraphrasing Tool | O x y! Yahoo x | + V newconnect.mheducation.com RATION . CONCENTRATION OF VINEGAR SUBMIT TRODU…
  • find the number of hydrogen atoms in a candle with a mass of 19.758g
  • I need answers please. plied. 1) What volume of O, is produced when 47.2 g of hydrogen peroxide (H202) decomposes to form water and oxygen at 160 C and 2.0 atm? H2Oz (aq) -_ H2O (1) + __Oz (g)
  • calculate the number of moles in 1 teaspoon of baking soda weighing 3.043g?
  • . Edit View Insert Format Tools Add-ons Help Accessibility Last edit was seconds ago A 100% Normal text Arial – 12 + B IU A GO P O . BE BEX BEVEE 1 1 1 1 7 : . a) Use the , then do stoichiometry, or…
  • You dissolve 5.06 g of sodium bicarbonate (molar mass 84.007 g/mol) in 104 g of distilled water if the temperature of water decreases by 2.80 K what is the heat of solution for sodium bicarbonate? You…
  • . nis + HNO3 M – Zn ( N0 3 /2 mm if 2.00 got In cs is mixed with 4.0oml of 0. 140 M HNog solution to form Zn (NOs)2 solution Determine The L.R, E.R and The masset In ( NO s ) 2 That can be produced….
  • we have a 1.14Kg block of ice at -24.4 degrees celsius. how much energy is needed to entirely melt the block of ice? the specific heat capacity of ice is 1.864J•K^-1•g^-1 and the enthalpy fusion i…
  • how many moles of fluorine atoms are in 3.2 moles of Ba(FO2)2 ?
  • . Why a tong is used to grip the beaker from a hot water bath?
    • Mercuric oxide decomposes when heated and forms free mercury metal and releases oxygen gas. If a 7.688Âg sample of the oxide is decomposed, 7.120 g of mercury is obtained.  A) Calculate th…
  • I need help completing my chemistry Homework Based on types of chemical reactions? 1. The following reaction KOH + HNO3 -> H2O + KNO3 What reaction is 2.The following reaction Al + Br -> AlBr3 i…
  • Theoretically, how much energy is released if 4.234g of calcium chloride is dissolved in 98mL of water? Use the correct amount of sig figs and give your answer in kJ.
  • how many moles of compound would be in 35.0g Xe(OH)2 if this compound could form
  • if we react 75.2mL of vinegar with 2.62g of baking soda, which reactant is the limiting reagent? a)acetic acid b)neither, they are equimolar c)water d)sodium bicarbonate
  • what is the specific heat capacity of 100.8 grams of a liquid that rises 11.41 degrees celcius when supplied with 2,411J of energy. Use units of Jg^-1K^-1. use the correct amount of sig figs.
  • a 44.2g g sample of hexanes with a specific heat capacity of 2.270Jg^-1K^-1 is heated using a 183.3W of power for 10.0 seconds. if the initial temperature is 21.7 degrees celsius, what is the final te…
  • Writebalanced net ionic equations f Obllowing cases. Identify the spectato a. BaCl2lag )+ Na2co3(aq) spectator ions:
  • how much energy is needed to raise the temperature of 12.3g of distilled water from 17.2 degrees Celsius to 33.3 degrees celsius. Use the correct amount of sig figs and report the answer in units of J…
  • Dilution Lab calculation questions (Show full calculations and brief explanations on the reasoning behind it)Â Â 1. (a) How would you prepare solution with a dilution factor of 1/2 where the final v…
  • . Question 30 Incorrect Rank the following acids in order of increasing acid strength. Key: Weakening of hydrogen bond and stability of resulting anion. Mark 0.00 out of (Electronegativityes |=2.5, …
  • How much heat Qf, in calories, is need to completely melt 92 grams of ice at at 0 C to water at 0 C? The latent heat of fusion (melting) of ice is, Lf = 80 cal/g. Please round your answer to the neare…
  • What is the Celsius temperature scale reading of 430 F? Please round your answer to one decimal place. (TF-32) Equation: To 1.8 D Question 22 4 pts A heat engine absorbs a supply of QH = 1,315 calorie…
  • A 27-g of ice at its melting point (i.e., at 00 C) is completely melted. The temperature of the water is then raised to 240 C. How much total heat Qtotal, in calories, is required in the entire proces…
  • A 103 gram sample of a metal is heated from 130 C to 1350 C. How much heat, in calories, was supplied? (Take the specific heat of the as c = 0.17 cal/gC). Please round your answer to the nearest whole…
  • What is the Kelvin temperature equivalent of – 490 F? Note that the Fahrenheit temperature is negative. Please round your answer to one decimal place. Equation: First find the Celsius temperature from…
  • What is the Fahrenheit temperature scale reading of 27.60 C? Please round your answer to one decimal place. Equation: TF =(1.8 x To) + 32 Question 13 4 pts A 393 g block of an unknown metal is heated …
  • If the titre volume of NaOH = 16ml & the concentration of NaOH is 0.1M, what will be the mass of CO2 dissolved (g) ?  The volume of water sample I used is 100ml.  Please use the equation bel…
  • A piece of metal whose mass is 46.4 grams is heated from 40 .C to 166 C as it absorbs Q = 716 J of heat. What is the specific heat of the metal in J/g C? Please round your answer to three decimal plac…
  • What is the Fahrenheit temperature scale reading of 155 K? Note that your answer is negative. Please include the negative symbol in the answer box. Please round your answer to one decimal place. Equat…
  • which sketch represents 1) MgCl2 dissolved in water 2) NH3 dissolved in water. magine a small amount of each compound in the table below is dissolved in water. Pick the sketch that best shows what the…
  • = O CHEMICAL REACTIONS Emma Theoretical yield of chemical reactions 3/5 Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium chloride (NaCl) and liquid w…
  • please explain how do I write the net ionic equation for each reaction that produced a precipitate?. 174 3. A student is given the following labeled solutions: NaCl, Pb(NO3)2, NaOH, NazC204, and Al2(S…
  • experiment : bomb calorimetry where the benzoic acid and an unknown sample are fuels. Question : Why was Na2CO3 used as the titrant instead of the more usual NaOH?
  • please pay attention to sig figs thank you. A 7.00 L tank at 8.04 .C is filled with 5.21 g of dinitrogen difluoride gas and 12.7 g of chlorine pentafluoride gas. You can assume both gases behave as id…
  • Answer Question number 7 only by looking at the whole lab procedure .    ÂÂÂHess’s Law Lab  Introduction : The combustion of magnesium is a very rapid and exothermic reaction. It is…
  • Isotope Name Cobalt-60 lodine-131 Strontium-89 Technetium-99 Sodium-24 and Symbol 60Co 131 89Sr 99TC 24 Na Protons Neutrons Electrons Atomic Number Mass Number I
  • Copper displaces silver in aqueous silver nitrate in a single displacement reaction as follows. Cu(s) + 2AgNO,(aq) – 2Ag(s) + Cu( NO,)2(aq) a) If zinc replaces copper, will a single displacement re…
  • . 8:41 Take Quiz Exit Match each vocabulary term on the left with its definition on the right. volatility [ Choose ] C vapor pressure [ Choose ] standard pressure [ Choose ] external pressure [ Choo…
  • Is it correct ? Please explain. 2. Write the complete and net ionic equations for the following reactions (1)-(4). Be sure to indicate the states of the reaction products. () AgNO,(aq) + NaClaq) – Agc…
  • . 2:03 Exit Question 3 1 pts The KE of gas particles increases as temperature decreases O increases D Question 4 1 pts On the Kelvin Scale, OC is equal to K. O 100 O 273 O 22.4 Question 5 1 pts. 2:0…
  • Watch video of 13th Documentary https://youtu.be/krfcq5pF8u8  The paper should include: 1. Research Method: What type of research methods (quantitative/qualitative) were used to support the docume…
  • Please answer as fast as you can.  Supplementary information “Acid Mine/Rock Drainage (AMD/ARD)” is a term referring to the generation of acidity as a result of the oxidation of residual sulphide …
  • CHEMICAL REACTIONS Theoretical yield of chemical reactions 2/5 Aqueous hydrobromic acid (HBr) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H O…
  • Absolute zero Atmosphere Barometer Diffusion Pressure Calorie Energy Enthalpy Heat System Work   Choose at least 2 terms from the list, and answer the following questions: What familiarity and pri…
  • What does anhydrous mean? What is the molar mass of anhydrous KAI(SO,)?
  • Answer for this. 1. What is the accepted value for the melting point for the alum you synthesized? Use a chemical reference handbook, or the internet. Be sure to write down the complete reference cita…
  • Magnesium metal reacts with iron (III) chloride in water to form aqueous magnesium chloride and iron. Write the skeleton equation below.
  • Hello, I need some help is my answers correct? if not can you please help me out, also 2,5,9,11 and 12 I didnt know what is the answer and why. Â. Lithium 1. Which element in the second period has th…
  • IgINSikr/joPSjh-lilaquit/ RBupob I MBSHKGS]PLUSOCCIWIJKVSNZ E O CHEMICAL REACTIONS 3/5 Emma V Theoretical yield of chemical reactions Gaseous butane (CH, (CH2), CH3 ) reacts with gaseous oxygen gas (O…
  • . Answer the following questions. Write your answers on intermediate pad paper/small- sized typewriting paper. Write legibly and no erasures. Show your solutions for nos. 3- 5. Final answers must be…
  • At room temperature (298K) a balloon has a volume of 2.4L. What will its volume be at 100K if the pressure remains the same? less than 2.4L more than 2.4L 2.4L
  • . Answer the following questions on Kw. Show your solution. Write your answers on intermediate pad paper/small-sized typewriting paper. Write legibly and no erasures. Final answers must be encircled…
  • grade 9 science. FINDING THE PERIODS AND GROUPS The names of five elements are lived below. Find each clement in the periodic table. Then fill in the missing information PERIOD GROUP ELEMENT SYMBOL NU…
  • please illustrate and make clear. thank you. 2. Create a visual representation of ionic substances to connect the microscopic structure of ionic substances to each of the following macroscopic propert…
  • For each of the following, use the solubility guidelines to determine if a precipitate will form. If a precipitate forms, write the following for each reaction: the balanced chemical equation the net …
  • The products of several precipitation reactions are given below. In each case, identify which product is the precipitate. a) barium sulfate and sodium sulfide b) lithium chloride and magnesium hyd…
  • Question 1: The contaminants below were listed as persistent organic pollutants (POPs) due to their strong long-distance transport and bioaccumulation potentials. Please explain why these contaminants…
  • Question 1 (4 points) Step 1: 2NO(g) -> N202(g) fast Step 2: H2(g) + N202(g) -> H2O(g) + N20(g) slow Step 3: N20(g) + H2(g) -> N2(g) + H2O(g) fast Determine the rate of the reaction at 298 K …
  • Question 18 (5 points) Which of the following numbers contains the designated correct number of significant figures? 0.04300 5 significant figures 0.00302 2 significant figures O 156 000 3 significant…
  • Question 17 (5 points) What is the length of the black line drawn below? 1 2 3 cm
  • Given the graph below, what is the value of Ea in kJ/mol? In k vs 1/T (K) 0.002 0.004 0.006 0.008 0.01 0.012 ( G G A w N H O H NW y= -2767.2x + 25.112 R? = 1 2767.2 kJ/mol O-23.01 kJ/mol 23.01 K…
  • The next three (3) problems deal with the titration of 321 ml of 0.501 M carbonic acid (H2CO3) (Kal = 4.3 x 10" , Kaz = 5.6 x 10-11) with 1.3 M KOH. What is the pH of the solution at the 2nd equi…
  • solve this.. 9. How is the number (quantity, not the value itself) of possible ( values related to n? a. Number of possible ( values = 2xn2. b. Number of possible ( values = n2. c. Number of possible …
  • Question 16 (5 points) What is the volume of the liquid? What scientific device is illustrated below? mL 50 40 40 30 20 30 10
  • Please include the step-by-step calculations. Thank you
  • Is this right?. Question 10 (5 points) Saved In which of the following pairs do both numbers contain the same number of significant figures? 2.0500 m and 0.0205 m 600.0 K and 60 K 0.10075 s and 75 100…
  • which particle drawing represents CaCl2 and CH3Cl when dissolved in water? (ignore the elements on the sides). lote for advanced students: the sizes of the atoms and any bond angles may not be accurat…
  • D Question 8 Three mechanisms are proposed for the gas phase reaction of NO with Bro to give BrNO: Mechanism 1 NO + NO + Br2 –> 2 BrNO Mechanism 2 NO + Br2 <-> Br2NO Br2NO + NO –> 2 BrNO…
  • If a substance has a density of 1.435 g/ml, how many grams would the substance weigh if the sample has a volume of 22.1 ml? Your answer must show all work detailing how you arrived at your final answe…
  • How does energy ‘flow ‘ into or out of reactants and products in endo – and exo -thermic reactions ? What types of observations can we predict and make for each type of reaction? Name: Date: C C Energ…
  • Magnesium metal reacts with iron iii chloride in water to form aqueous magnesium chloride and iron. What kind of reaction is this? Will this reaction occur? Explain.
  • C awww-awu.aleks.com/alekscgi/x/Isl.exe/10_u-lgNslkr7j8P3jH-liiaqJit7RBupo61MBsHKG9jpLuS8ccTwjKMSSCe4wHKAMXEyNOb 1 1H4JJbon44Uqfir)> I Iry E CHEMICAL REACTIONS Theoretical yield of chemical reactio…
  • Which one of the following substances will float in gasoline, which has a density of 0.66 g/ml? The density of each substance is shown in parentheses. table salt (D = 2.16 g/ml) balsa wood (D = 0.16 g…
  • . Periodic Table Which of the following would decrease the dissolution rate of a sugar cube in water? O A. increasing the temperature of the water O B. decreasing the temperature of the water O C. b…
  • Our conductivity probes are not able to measure the conductivity of a 0.500 M CaCl2 solution, but you can estimate it using the relationship you found in the prior question. Predict the conductivity o…
  • A chemical engineer is studying the following reaction: H2(9)+ Cl,(9) -2 HCI(g) At the temperature the engineer picks, the equilibrium constant K,, for this reaction is 2.6. The engineer charges (&quo…
  • CHEMICAL REACTIONS Theoretical yield of chemical reactions 0/5 Em Gaseous ethane (CH, CH3 ) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2 ) and gaseous water (H, O). What …
  • Look back at your completed Results table #3.ÂDiscuss the implications of temperature as well as addition of a catalyst to the rate of the reaction.ÂAre your rate constants, k, essentially constant …
  • Calculate the amount of phenol red (in ug) for unknown 1 and 2. phenol red formula weight is 376.4 please explain give complete answer. SAMPLE CALCULATION FOR THE DETERMINATION OF THE CONCENTRATION OF…
  • How do I solve it ?. . A mixture of 0.0375 g of hydrogen and 0.0185 mol of oxygen in a closed container is sparked to initiate a reaction. How many grams of water can form? Which reactant is in excess…
  • CHEMISTRY TEST 1 Answer all these questions with 5-10 sentences. 1. What are the differences in preparing soap and detergent? 2. What will be the best thing to use in handwashing and dishwashing? Is i…
  • Calculate the amount of phenol red (in ug) for unknown 1 and 2. phenol red formula weight is 376.4 Â please explain give complete answer no copy paste
  • In some parts of the galaxy. electrons in hot hydrogen gas may be excited to very high quantum levels. Calculate the wavelength of light that would be emitted if electrons moved from the n = 2D shell …
  • In photoelectron spectroscopy (PES), ultraviolet radiation is directed at an atom or a molecule. Electrons are ejected from the valence shell and their kinetic energies are measured. Because the energ…
  • . Calculate the Ka of hypochlorous acid (HCIO) given the following information. A 0.124 MHCIO(aq) solution produces a pH of 4.215. An ICE table has been provided to guide you. HCIO(aq) + H,O() + HOT…
  • When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water areÂproduced.  CaCO3(s)+2HCl(aq)⟶CaCl2(aq)+H2O(l)+CO2(g)CaCO3(s)+2HCl(aq)⟶CaCl2(aq)+H2O(l)+CO2(…
  • Some may not have any chromophores. 1. Rank the following compounds in the order in which you think it would be easiest to quantitate them by UV-vis spectroscopy. Explain the reasons for the order of …
  • Each step in the following process has a yield ofÂ60.0%.  CH4+4Cl2⟶CCl4+4HClCH4+4Cl2⟶CCl4+4HCl   CCl4+2HF⟶CCl2F2+2HClCCl4+2HF⟶CCl2F2+2HCl  The CCl4CCl4 formed in the first step is use…
  • . What is being oxidized in the following reaction. Ca + 2H20 –> Ca(OH)2 + H2 hydroxide calcium hydroxide water calcium oxygen hydrogen gas. What is the oxidizing agent in the reaction? FeBrg + …
  • . 3. Consider the following cell: Hg(l)/Hg22+(aq, 1 M)//Fe2+(aq, 1 M)/Fe(s) A. What is the anode reaction? B. What is the cathode reaction? C. What is the cell potential at standard state? 4. A g…
  • C www-awu.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3jH-liiaquit7RBupo61MBsHKG9jpLuS8ccTwijKMS5Ce4wHKAMXEyNObT1H4JJb8h44DqYirJJTikyULW220sKzH… E O CHEMICAL REACTIONS Limiting reactants 3/5 Gaseou…
  • . Experiment 7: Boyle’s Law & Ideal vs. Real Gases Robert Boyle. a philosopher and theologian, studied the properties of gases in the 17th century. He noticed that gases behave similarly…
  • Please watch the attached video for the reference and then answer the following https://youtu.be/3nKFslvjrTU Introduction What is total sugar and how it affects food quality? What is the importance of…
  • Predict the products of the following reactions. 8. Aluminum in an aqueous solution of silver fluoride
  • Question 5 1 pts Using the video as a model, which reaction most accurately reflects the dissolving of CaCl2 in water? O CaClz (s) Ca" (aq) + CI (aq) CaCl, (s) Call, (aq) CaCi, (s) – Call (aq) + …
  • Thoughts on A research problem I believe chemists should be working more on is, “How does brain chemistry affect recovery from addiction?”. I believe, through personal observation, that many people ar…
  • Which of the following ions would form a precipitate? a. Barium and chloride b. Zinc and chromate c. potassium and carbonate d. ammonium and sulfate e. none of these would form a precipitate 2. Amo…
  • Lesson 7.2 Assignment Upload: Ionic Bonds and Ionic Compounds Instructions Use the periodic table to determine how many valence electrons each element has and write the electron dot structures for the…
  • Choose an article involving chemistry published within the last six months. Explain how a chemistry topic you learned in this course can be used to understand the chemistry behind this article. Âcite…
  • 1)Help Asha identify whether the reaction is a synthesis or decomposition reaction: H 2 + F 2 2 HF , is this synthesis or decomposition? 2)Identify if the following reaction is balanced or not balance…
  • Question 8 1 pts Our conductivity probes are not able to measure the conductivity of a 0.500 M CaCl2 solution, but you can estimate it using the relationship you found in the prior question. Predict t…
  • In the chemistry stock room, aqueous solutions are typically prepared by dissolving solute in a solvent using volumetric glassware. For example, in this lab you will be working with a solution of 1.50…
  • C ( www-awu.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3jH-lilaqlit7RBupo61MBsHKG9jpLuS8ccTwijKMS5Ce4wHKAMXEyNObT1H4JJb8h44DqYirJJTikyULW220sKzHQIOr… [C O CHEMICAL REACTIONS D1/5 En Limiting react…
  • Note: that some of the temperature ranges are smaller, the gas would condense or decompose beyond these limits. The software is trying to keep it real. CALCULATIONS: 1. Using PV = nRT, calculate the v…
  • please be careful with significant figures thank you. A certain reaction is second order in N, and second order in H,. Use this information to complete the table below. Round each of your answers to 3…
  • Would you able to explain to me how to solve this. 2 Na/ t kys -> 12 k)+ INas How many grams of k’ can form from Le, 89g of Na? SQ NA A mol kent
  • How many grams of CO2 would be needed to have the same number of moles of CO2 as there are in59.9 grams of H20? grams carbon dioxide
  • . According to molecular orbital theory. draw the energy diagram, calculate the bond order and determine if these molecules or ions exist 5) F2 :- lndicate the geometry and hybridization for atoms 1…
  • Boyle’s Law and Ideal vs Real Gases Name Part 1 Table 1: Ideal Gas 1 MW = 4 g/mol Ideal Gas 1 MW = 4 g/mol Volume (L) Pressure (atm) PV Product (P * V) N2 Volume (L) Pressure (atm) PV Product (P * V) …
  • please explain give both answer no copy paste. 2. Using the correct character tables, determine the orbitals used for bonding in the following: a) fac-[WH3Cl;] *you may need to revisit your Chem 13…
  • Part 2. Gas n (mol) P (atm) T (K) V (L) Calculate % error d R (L atm / mol K) Ideal 1, low T, low P Ideal 1, low T, high P Ideal 1, high T, low P Ideal 1, high T, high P N2, low T, low P N2, low T, hi…
  • Using the concepts of electronegativity, asymmetrical vibration, and infrared radiation absorption, explain why NF 3 would be a stronger greenhouse gas than CO2. For your reference, the structures …
  • If you rinse, a 10 mL graduated cylinder that has already been weighed with water and then use it while it is still wet to measure out 10.0 mL of a sucrose solution. Will the density you determined be…
  • . A chemist prepares a solution of sodium carbonate (NaZCOS) by measuring out 62.5 g of sodium carbonate into a 350. mL volumetric flask and filling the flask to the mark with water. Calculate the c…
  • Please help me answer. Pentane gas (C5H12) combusts with oxygen gas (02) to form water (H20) and carbon dioxide (CO2). Write a balanced chemical equation for this reaction and explain the scientific p…
  • For each of the unknown compounds in a sentence or two summarize the data collected on the compound and explain what conclusions this data supports about the compound’s classification as one of the se…
  • Help answer this correctly. Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation: CH4 + NH3 + 02 -> HCN + H20 You have 8 g of …
  • please answer both parts explain both give complete answer no use of copy paste
  • At a festival, spherical balloons with a radius of 250. cm are to be inflated with hot air and released. The air at the festival will have a temperature of 25 .C and must be heated to 100 "C to m…
  • Please answer the question. What is the electron configuration of an electrically neutral atom of sodium? What is the electron configuration of an electrically neutral atom of neon? What is the electr…
  • . QUESTION 1 If the initial buret volume was 4.80 mL and the final buret volume was 22.65 mL, how much NaOH was used for the titration? O 17.85 mL 16.95 mL 27.45 mL 18.25 mL QUESTION 2 If you use…
  • grade 9 science. SCIENCE 9: PERIODIC TABLE OF ELEMENT Each row across the periodic table is called a PERIOD There are seven (7) periods Each column in the periodic table is called a Group, or Family T…
  • If you rinse, a 10 mL graduated cylinder that has already been weighed with water and then use it while it is still wet to measure out 10.0mL of sucrose solution. Will the density you determined be gr…
  • Please solve this problem.. Write the balanced equation for the reaction that occurs when methanol, CH,OH (1), is burned in air (O2 ()) and produces carbon dioxide and water. ( CH3OH(1) + 02(8) – CO2(…
  • grade 9 science. FINDING THE PERIODS AND GROUPS The names of five elements are listed below. Find each element in the periodic table. Then fill in the missing information. PERIOD GROUP ELEMENT SYMBOL …
  • Experiment by changing the number of species , volume and pressure. What combination do you need to blow the top off?
  • how can I write the complete ionic equation for each reaction that produced a precipitate? Explain pleaseÂ. 174 REAC0406: Writing Chemical Equations and Identifying Unknown Solutions Using Microscale…
  • How much ammonia in molecules would be made if you started with 175 grams of molecular hydrogen?
    • A chemist makes 80. 0 mL of barium chloride (BaCl2) working solution by adding distilled water to 50. 0 mL of 0.254 mol/L stock solution of barium chloride and water. Calculate the concentration of…
  • Describe the structural changes that occur for BH3, CH4, NH3, H2O, HF as the central atom changes. According to the Lewis/VSEPR theory of bonding why do these changes occur?
  • Please solve this problem.. Ammonia (NH3) is a very important compound in fertilizer for healthy plants. It is made by combining molecular nitrogen (N2) and molecular hydrogen (H2). Write the balanced…
  • Draw a picture of what happens to Na2SO4 after it is added into a beaker of water. The equation is NaSO4 <> 2Na + + SO 2- 4 (aq)
  • Please solve this question.. Ammonia (NH3) is a very important compound in fertilizer for healthy plants. It is made by combining molecular nitrogen (N2) and molecular hydrogen (H2). Write the balance…
  • evidence and reasoning please👍. Question: A student creates a pack using 100g of a material with a specific heat capacity of 2.1 J/g C. If the pack generates 210 joules of heat, is that an effectiv…
  • it is a redox reaction. Potassium manganite (VII) oxidizes iron (I) ions to iron (I I mol MnO. (aq) = 5 mol Fe > (nq) Apparatus and Materials Solution containing 35.0 g dm of ammonium iron sulphate…
  • please pay attention to sig figs thank you. Calculate the root mean square (rms) average speed of the atoms in a sample of xenon gas at 0.17 atm and -95. C. Round your answer to 3 significant digits. …
  • I have the data but I don’t know how to upload it. A. Discuss how well your results for the weight % magnesium agree with the class results. (Since the magnesium and oxygen results are related, only t…
  • How do I solve it ?. 37.2 g Fz . / molF2 . 2no1 4OF = 19 6 MOLLOF 38.00 9 F2 1 mol F2 2. Early rockets used a fuel composed of hydrazine (N2H4) and dinitrogen tetraoxide (N204), which react on contact…
  • True/False The mass of an electron is equal to the mass of a proton. The mass of a proton is approximately equal to the mass of a neutron. The atomic number represents the number of protons in a nu…
  • Toluene (C6H5CH3) is a liquid used in the manufacture of TNT (trinitrotoluene). Its normal boiling point is 111.0 °C and its molar heat of vaporization is 35.9 kJ/mol. What would be the vapor pressur…
  • I provided supplementary explanation and reference for you to solve it easily. Please provide a clear explanation. BIG LIKE  Supplementary information  Acid Mine/Rock Drainage (AMD/ARD)” is a term…
  • Which of the following statements are true? 1. A catalyst increases the number of products. II. A catalyst increases the rate of the reaction. Ill. A catalyst decreases the activation energy of a reac…
  • Which reaction has the lower activation energy? Reaction A Reaction B R Energy Energy P p Progress Progress Not enough information is given. They have the same activation energy Reaction A Reaction B
  • Radiometric dating uses radioactive isotopes to identify the age of different materials. These decay of radioactive isotopes follow first-order kinetics, which means the half-life… is the same for a…
  • Write a balanced equation for the following neutralization reaction. (4 marks) a. HNO3 + KOH > b. H2SO4 + Ca(OH)2> 2. Three 20.0mL samples of nitric acid are titrated with a 0.200 mol/L solut…
  • A reaction follows first-order kinetics. Which of the following plots would be used to identify the rate constant for the reaction? A. B. [A] Ln [A] Time Time C. D. 1/ [A] [A]2 Time Time O Plot C O Pl…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions: Â. Question 9 Which…
  • Please go through the concept of Voltaic Cells if needed and help me asap Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing Questions: Â. Question 9 Which of th…
  • What is the Delta T for this graph? Â. Time/sec Temperature/C 40 0 25 30 25 60 25 90 25 120 25 150 25 35 210 240 32 270 33 300 34 Temperature/oC 330 30 34 360 33.5 390 33 420 33 450 32 480 25 31 51…
  • A reaction has the following rate law: Rate=k[A][B]2 The reaction is said to be….. second-order with respect to A first-order with respect to A. zero-order with respect to A O an overall second-orde…
  • Help please. Which of the following is likely to be an Alkali Metal? 1 poir O an uncreative colorless gas O a very toxic and reactive green gas readily reactive silvery solid that fizzes with water a …
  • What is the relationship between the rate of disappearance of NO2 and the rate of appearance of N204? Given the reaction: 2NO2 – N204 O 1 A [NO2] A[N2 04] At 0 2 A[NO2] A[N2 04] At At A[NO2] A[N2 04] …
  • Here’s the data: T (degree C) 20 25 30 35 40 45 50 55 60 65 68.3 Water- rich layer 8.4 8.71 8.92 9.34 9.78 10.62 12.08 13.88 17.1 22.26 30.57 Phenol – rich layer 72.24 71.38 69.95 68.28 66.81 65.02 62…
    • A chemist must prepare 800 mL of 3.00 M aqueous sodium nitrate (NaNO3) working solution. She’ll try this by pouring out some 3.44 M aqueous sodium nitrate stock solution into a graduated cylinder a…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions:. Question 9 Which…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions:
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions: Â. Question 7 Wh…
  • Three different solutions containing isopropanol (pure vapor pressure = 45.2) and water (pure vapor pressure = 18.5 torr) we made in the lab with different mole fractions. Which solution has the highe…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions:  Â. Question 5…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions: Â. Question 5 Co…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions: Â. Question 3 Fo…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions:  Â. Question 3…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions:  Â. Question 1…
  • Please go through the concept of Voltaic Cells if needed and help me asap  Link: https://drive.google.com/file/d/1CJNvJ_IkMX8kj86Q7JzrF_wn9L0z3y7g/view?usp=sharing  Questions: Â. Question 1 Fo…
    • Humans can detect light through two types of cells commonly known as rods and cones. Within the cone, there are three types: S-cones, M-cone, and L-cones; each sensitive to 420, 534, and 564 nm…
  • A solution of 5 mole of isopropanol (pure vapor pressure = 45.2) and 5 mole of water (pure vapor pressure = 18.5 torr) was placed in a container. The gas above the container was removed and converted …
  • Please help Â. Given the electronegativity of rubidium is 0.8 and of chlorine is 3.0, our 1 point best interpretation of a bond between these two elements would be: O a polar covalent O a nonpolar …
  • Which compound do you expect to have the strongest intermolecular forces? Methanol, AHvap = 35.2 KJ/mol Ethanol, AHvap = 38.6 KJ/mol Methane, AHvap = 8.17 KJ/mol Ammonia, AHvap = 23.4 kJ/mol
  • . Page 6 of 6 Bond atoms in order given ! : C – NOCH H 15. Answer all parts of this question for the molecule NCCH3. A. Draw the Lewis structure. If your initial Lewis structure does not clearly sug…
  • Chose the beaker that contains a solution among these 3 choices.Â. Periodic Table During a classroom activity, the Tyndall effect was used to differentiate between a colloid, a suspension, and a s…
  • . Page 5 of 6 14. The mass spectrum of a fictional element with two naturally occurring isotopes is shown below. Estimate the average atomic mass of this element and provide a rationale and/or show …
  • CTQ 1: Why are we working in the hood ? Which chemicals are the most volatile in this experiment and why ? CTQ 2: Assume molecule A reacts with molecule B; molecules A and B must collide with each oth…
  • . 12. Complete this question for the species NNO. (10) Draw two acceptable Lewis structures as directed in the column headings below. 4 . Assign formal charges to each atom. N Decide whether one Lew…
  • The factors effecting the rate of a reaction can be explained using Collision Theory, which are summed up by Arrhenius equation, k = Ae-Ea/RT (I) what are the constants, k, A and Ea stand for? (6 poin…
  • Calculate the theoretical percentage composition of NO. % N= % % OF %
  • which ionic compound formula is least likely to be correct? A) NH4Cl B) Ba(OH)2 C) Na2SO4 D) Ca2NO3 E) Cu(CN)2  2. what is the approximate bond angle in H2Se? A) 180 B) 120 C) 109 D) 90 Â. Pag…
  • Current Attempt in Progress What is the total number of C, H, and O atoms in 0.394 moles of glucose, CH1206? x 10 atoms e Textbook and Media
  • Current Attempt In Progress How many moles of H2 and N2 can be formed by the decomposition of 0.227 mol of ammonia, NH3? (a) H2 i mol (b) N2 i mol
  • The following is a reaction between 2 conjugate acid/base pairs, HF/F- and HCIO/CIO HCIO + F- <=> CIO- + HF (1) K1 = ? (1) HCIO is an acid, and its conjugate base is F is and a base, its conjuga…
  • Watch the video below and answer the following questions. https://www.youtube.com/watch?v=vp9AY8k5Lqc 1. Does the amount of particles that were collected differ from one square to another? 2. What are…
  • Light of 260 nm wavelength is shined through a cuvette containing a solution of analyte. 35% of the light passes through the solution. What is the absorbance?
  • A compound contains 43.64% P with the remainder being oxygen. What is the empirical formula of the compound?
  • . Determination of the Equilibrium Constant of the Formation of FeSCN2+ Prelab Questions 1. Define equilibrium. 2. The reaction for the formation of the diamminesilver ion is as follows: Ag+(aq) + 2…
  • Average Kc = 55.4 Also I just need questions one through three Is there a problem?. Calculate the average value of Ke 5 5.4 Discussion 1. In your laboratory report, show a sample of each type of calcu…
  • When molecules are shown as Lewis structures, a double covalent bond is 1 poi drawn as pair of dots between the atoms a dashed line between the atoms O a single line between the atoms O two line…
  • Covalent compounds form O molecules crystals O polyatomic ions O none of the above onic compounds form O molecules O crystals polyatomic ions none of the above
  • What is the average mass of one molecules of table sugar, C12H22O11? Enter your answer in the form of 1.00E2 for scientific notation.
  • Watch the video and answer the following questions. https://www.youtube.com/watch?v=vp9AY8k5Lqc 1. Does the amount of particles that were collected differ from one square to another? 2. What are the p…
  • Effective mass theory 1. Calculate the effective mass donor energy levels for GaN and B-Ga203 2. Compare these values with the common donors: Si, Ge (and Sn for B-Ga203) 3. Calculate the Bohr radius f…
  • Examine the Lewis diagrams of four 6 points hypothetical elements shown below. a. Which elements are metals? How do you know? b. Would element [A ]share electrons with oxygen? Explain your answer. c. …
  • An alkali metal is positioned in period 4 of the periodic table. Locate this element and complete the following questions. A. What change must occur to this atom in order to become an ion (anion or ca…
  • i need help please. 2:37 PM Fri Feb 25 . . . 2 88% Take Quiz Exit D Question 13 1 pts Propanoic acid (HC3H702) is an acid that dissociates in water. what species would be present in a solution of prop…
  • i need help please. 2:36 PM Fri Feb 25 . . . 2 89% Take Quiz Exit D Question 5 1 pts Ethanol can be converted into acetic acid (the acid in vinegar) by the action of sodium dichromate in aqueous sulfu…
  • Activity: Polymers  Background information and purpose:  Polymers are long molecules made up of repeating units called monomers. For example a polymer may be represented as: A-…
  • Please help Â. In the Bohr-Rutherford diagram below, which noble gas would this element 1 point be most like if it had 8 valence electrons? O helium O neon O argon O not enough information is given W…
  • Please help  Â. In the Bohr-Rutherford diagram below, how many valence electrons does 1 point this atom need to gain or lose to satisfy the octet rule? O 2 O 5 O 3 O not enough information is given…
  • i need help with these please:). Question 5 1 pts Ethanol can be converted into acetic acid (the acid in vinegar) by the action of sodium dichromate in aqueous sulfuric acid according to the following…
  • Real exam question + student answer – May 2021 (same question on exam May 2018) Question 1. Specify the typical stoichiometric equation for growth under aerobic conditions, where glucose is used as su…
  • Can someone help me with this. Phosphine is used as a.fumigant AND has a chemical formula [PH3]. Using 2 poin the elecronegativitity values can you determine the type of bonds formed between the atoms…
  • Can someone help me with these two. Describe tree differences between an ionic and a covalent compound. 3 po Your answer An alkali metal is positioned in period 4 of the periodic table. Locate this 8 …
  • Can someone help me with this. Examine the Lewis diagrams of four hypothetical elements shown below. 6 points a. Which elements are metals? How do you know? b. Would element [Ashare electrons with oxy…
  • The 2 written chose in the blank, the choices are lower/higher.Â. Periodic Table Lake Michigan is 577 ft above sea level and Lake Tahoe is 6,225 ft above sea level. The atmospheric pressure over Lake…
  • what type of reaction is between Ni(NO3)2(aq) and DMG
  • . 7. A gaseous fluorocarbon is used a coolant in refrigerators. If a fixed volume of this gas has a pressure of 700 kPa at 227 "C, its pressure at 27 "C is A. 420 kPa B. 1170 kPa C. 5890 k…
  • . 11. Use the unbalanced equation to answer the question. _ Had+_ Oziel – _ How If 10 L of hydrogen reacted with oxygen, then the reaction requires / L of oxygen and produces L of water vapour 10 L …
  • . 12. Three LOL Backs contain He, Na. H.5 at SATP. Which statement indicates the relative number of molecules In the flacks? A. The flask of Ny contains the most molecules. B. The flack of HiS conta…
  • A 2.89-g sample of octane is burned in a bomb calorimeter containing 7.98 x 102 g H20. Given that 1.66 x 105 cal of energy is released if the water temperature increases 2.08 C. Calculate the energy r…
  • A 1.0-g sample of a candy bar (which contains lots of sugar and fats!) was burned in a bomb calorimeter. A 3.7C temperature increase was observed for 1.00 x 10′ g of water. The entire candy bar weighe…
  • A 2.5 L BALLOON CONTAINS 0.100 MOL OF AIR AT 115 KPa Pressure. The temperature of the air in the balloon is  1. 73 2. 30 3. 345 4. 100
  • Hello!! :)) I was wondering as to how to go about these problems I’m very stuck on and I don’t really know where to start is there anybody that can help me please? Thank you so much!! :)). 4. An exper…
  • Write the equilibrium constant expression for the following reaction. Remember to use brackets, [ ], for concentrations and use exponents where needed, but do not show physical states in your answer. …
  • At a given temperature, the equilibrium constant for a certain reaction is 1 x 1016. Does this equilibrium favor products or reactants? Why? Select the single best answer. O A small value for the equi…
  • If 0.10 mol ammonium chloride (NH4CI) is dissolved in water producing 1.44 x 10 g of solution, the water temperature decreases from 25.0 C to 18.1 C. Part 1 out of 2 If the specific heat of the soluti…
  • . howshethat, Its minimum amount of extend code produced will be CILIel methane hatch with amorn of open the volume of carbon dioxide produced h 11 21 D. I Do I of machine man with Do if enron, the …
  • Write the equilibrium constant expression for the following reaction. Remember to use brackets, [ ], for concentrations and use exponents where needed. Click in the answer box to activate the palette….
  • Write an equilibrium constant expression for the reversible reaction. Remember to use brackets, , for concentrations, and use exponents where needed. 2NO2(8) < N2(g) + 202(8) Keg
  • A container holds the following mixture at equilibrium: [NO2] = 0.26 M [N2] = 0.12 M [02] = 1.93 M If the reaction is: N2(8) + 202(8) – 2NO2(8) calculate the equilibrium constant. Enter your answer in…
  • Q6 – Synthesis question A to E. Show how the starting material can be converted to the product through any of the reactions you have learned in O.Chem -I and O.Chem -II. Show all the reagents you need…
  • Q4 -Fill in the boxes with the product or products of the following reactions . Draw only the PREDOMINATE REGIOISOMER and indicate stereochemistry where appropriate . If a racemic mixture is formed , …
  • Q3 -Fill in the boxes with the product or products of the following reactions . Draw only the PREDOMINATE REGIOISOMER and indicate stereochemistry where appropriate . If a racemic mixture is formed , …
  • Q1 – Write the IUPAC name of the following compound in the space provided . Designate R or S and E or Z as needed A- HO HC B – OH Q2 -Rank the carboxylic acid according to their increasing acidity . W…
  • https://www.youtube.com/watch?v=Pit2CASIOMO turn the volume low or put in ear-buds. 19. Fill in chart. Eggs 20) 1 mole = g 21) 1 mole = particles 22) Fill in chart moles
  • What is the empirical formula of 26 g of Na, 36 g of S and 36g of O? a. NaSO4 b. Na2SO4 c. NaSO2 Â 2. If you have 2.25 grams of a molecule with a molecular weight of 134.1g/mol, how many moles of …
  • Calculate the percent composition of H2SO4. Then calculate the masses of hydrogen, sulfur, and oxygen in 90.0 g of H2SO4.
  • Mass of 250 ml beaker + CuSO 4 -5H 2 O (2 decimal places) = Âgrams  Mass of beaker is 105.91
  • please i need the correct resolution with the steps on how to get to the answer thank you. 3. A partir de la siguiente ecuacion quimica, determine: 2 Nal03 (aq) + 5 SO2 (aq) + 4 H20 (1) – 2 NaHS04 (aq…
  • is changing in color and no new substance occur chemical change or physical Change?
  • We are doing this lab, and I have made my way through all the observations but need help on calculations and we need to show our work and steps. I had added all the important data so PLEASE read caref…
  • Two energy levels are separated by 2.0 x 10-22 J/particle. If T=298 K and n =1 mole, what percent of molecules are in the upper level compared to the lower level?
  • Heating Curve of Water Equation q = c x m x ΔT q is heat absorbed or lost (energy) c is specific heat (water is 4.184) m is mass ΔT is change in temperature Background The three states of matter are…
  • Directions: Cut-out the following statements and pictures below and, with the help of your partner, categorize them into the states they best associated with (solid, liquid or gas) on the next page. T…
  • Hypophosphorous acid has one acidic proton, despite its molecular formula H3PO2, because only one of the hydrogen atoms is bonded to an oxygen atom. a. Calculate the equilibrium composition, soluti…
  • Rank the following compounds in the order in which you think it would be easiest to quantitate them by UV-vis spectroscopy. Explain the reasons for the order of your ranking. N-hexane Cyclohexane C…
  • Determine the empirical formula for each compound. a) ethylene (C2H4) b) ascorbic acid (C6H8O6) 2. What is the empirical formula of a compound that contains 10.52 g Ni, 4.38 g C, and 5.10 g N? 3. Naph…
  • What is the percent composition of a compound formed when 4.96 g of bromine combines with lithium to form 5.39 g of lithium bromide?
  • What is the percent composition of a compound formed when 6.85 g of magnesium combines with 20.0 g of chlorine to form magnesium chloride?
  • What is the wavelength of radiation with a frequency of 1.5 x 105m? a. 3.6x1018m b. 2.0x103m c. 2.5x103m d. 2.5×10-2/sec 2. Which set of quantum numbers is incorrect? a. n=2, l=1, ml=-1,0,+1, ms=+?…
  • Question Completion Status: QUESTION 5 Using the results of your flame tests, match the flame color to each ion tested. Select "None" if the flame does not change color. J. V A. green and vi…
  • What are your thoughts on researchers to look more into is an alternative to opioid pain management? As many of you know the country has been in a opioid crisis for many years. Many people have become…
  • . PUZZEL: ATOMS, MOLECULES and ION 2 3 5 6 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
  • please explain and give complete and correct answer Â. Correct these questions and SHOW ALL WORK: What is the pl after the addition of 1.0 ml. of 0.10 M HCI to 20 mL of the olution above? Given: V…
  • Please help and explain with appropriate letters? Thanks! Part I a) Calculate the wavelength (in nm) of the red light emitted by a barcode scanner hat has a frequency of 4.62 × 10 14 Hz. b)ÂA laser …
  • . |1. Draw the following 6. ethylcyclopentane 7. cyclobutene 8. 3 ethylhexane 9. 2-methyl-1-butene 10. 3:methyl-3-ethylpentane
  • Name Al3+, Ti4+, Zn2+ flame color with and with out the cobalt glass
  • Consider the following reaction. Mg(s) + 2 HCl(g) → MgCl2(s) + H2(g) [Balanced] When 2.08 g of magnesium are reacted with excess HCl gas, the mass of magnesium chloride (MgCl2) produced was 7.54 g…
  • Below are some sample atomic spectra showing all the individual colors released by excited atoms of selected elements. If an element like calcium releases many different colors of light when heated in…
  • A nanotechnolog experiment requires 6.64 x 10^16 atoms of potassium. What is the mass of the sample?
  • Calculate the theoretical percentage composition of N2O
  • Below are some sample atomic spectra showing all the individual colors released by excited atoms of selected elements. Using the spectra below briefly explain why strontium shows a red flame in your e…
  • Calculate the theoretical percentage composition of N2O. % N = % O =
  • The energy of invisible light increases in the order red, yellow, green, blue, and violet. Based on the color of the flame test arrange each of the following ions of increasing energy na+, k+, sr2+, c…
  • QUESTION 2 Visible light energy is released when an electron moves from a higher energy level to a lower energy leve an electron moves from a lower energy level to a higher energy leve O electrons swi…
  • @ 2020 DEPARTMENT OF CHEMISTRY AND CHEMICAL BIOLOGY MCMASTER UNIVERSITY Question 4. (12 marks) Draw the MAJOR product(s) for each reaction. Be sure to show all necessary stereochemistry. If more than …
  • Help with all please Help please Instructions Lab Week 8: Separation of Amino Acids (Introduction & Sample Data) Â Amino acids can be separated from one another using paper chromatography because…
  • What is the volume of 100.0 g of lead if lead has a density of 11.34 g/cm 3 ?
  • Please show your work as you solve each one.. 7.4 Formal Charges and Resonance 44. Write resonance forms that describe the distribution of electrons in each of these molecules or ions. (a) selenium di…
  • please explain give complete answer no copy paste. 5. Buffer intensity. A. Plot the buffer intensity vs pl of a solution containing EF-0.001 mol/kg (pKa=3.2) and ECO3=0.005 mol/kg (pKal=6.3; pKa2=1…
  • How much heat is required to raise the temperature of a-825 g block of wood (specific heat = 1.8 J/g.C) from 22.0’C to 155.0"C? 7. When 481 J of energy is added to 18.3 g of aluminum at 17.40C…
  • Name: Date: Class period: Unit: Thermochemistry "q=mcAT" – WS #2a Directions: Show all work for the following calculations. 1. How much heat is required, in calories, to raise the temperatur…
  • Testing Substances. a. Place a small amount of your test substances in the containers. 1. For solids like baking soda, you can test them when dry, but mixing them with water is recommended. b. Plac…
  • does mixing Copper Sulfate and Sodium Carbonate form or produce insoluble solid substance?
  • (3 marks) Give one area of application of PCR. Give detailed account how it is important in not more than two sentences. (if you site any literature, give Reference in APA format)
  • A gold, Au, bracelet has a mass of 580 mg. Â Calculate the number of moles of gold, Au, in this bracelet. How many gold atoms are in this bracelet? Â Bonus The lead, Pb, level in a local lake is 0.2…
  • Write out the molecular, ionic and net ionic equations (if applicable) for the following mixtures of solutions. a. CaS and (NH4)2SO3 b. MgBr2 and AgNO3 c. NH4OH and LiNO3 1. What is a spectator ion?
  • Predict whether the following compounds will be soluble or insoluble in water. a. LiNO3 b. Ca3(PO4)2 c. BaCrO4 d. MgS
  • Hello!! :)) I was wondering as to how to go about these problems they’re the only ones I’m stuck on and I don’t really know where to start is there anybody that can help me please? Thank you so much!!…
  • Please answer.. Research: Highlights in History Draw a diagram showing the connection between mechanical work and heat in steam engines used in earlier designs of trains and ships.
  • For a sanitary sewer collection system, identify the purpose of a suitable pipe material, proper pipe velocity, lift stations, proper pipe bedding, and minimal infiltration and inflow.
  • Predict whether or not the following compounds will be soluble or insoluble in water. a. LiNO3 b. Ca3(PO4)2 c. BaCrO4 d. MgS e. PbCl2 f. NaCl
  • Write out the molecular, ionic and net ionic equations for the following mixtures of solutions. a. MgBr2 and AgNO3 b. NH4OH and LiNO3 c. CaS and (NH4)2SO3
  • . Air & Water Vapor Cooling Tower Air Air Steam Brine Weste Brice Production Jection Image Source: https://earthandhuman.org/geothermal-energy-facts/ Guide Questions: 1. What are the different s…
  • Please watch the attached video for the reference and then answer the following https://youtu.be/3nKFslvjrTU Introduction What is total sugar and how it affects food quality? What is the importance …
  • . Exercise 2 For each of the following, a.) Write the electron configuration and b.) Distribute the electrons in the main energy levels. 1. Na – (11e-) a.) e- configuration b.) e- distribution in ma…
  • It is necessary to concentrate Calcium Sulfate (CaS04 ) solution by evaporation of its water content if the feed is 200 kg/tur with 30+ atb-d =305 12 amajor Casoy at 50 "C and 3:5 bar, Determine …
  • What is the proportional mortality due to pneumonia in your file? 3. While the proportional mortality rate seems fairly high, you know
  • . Which of the following salts acts like an acid when added to water? a. ammonium nitrate b. potassium nitrite c. iron(III) nitrate d. both a and b e. both a and c
  • spectator ions: spectator ions: spectator ions: spectator ions: spectator ions: spectator ions: spectator ions: spectator ions:
    • BaCI2(aq) + Na2CO3(aq) H2504 (ag) + Ca(OH) 2 Nal(aq) + AgNO3 (aq) – HBr(aq) + KF(aq) HCI(aq) + Zn(OH) 2 (s) – H3PO4(aq) + NaOH(aq) AI(OH)3(s) + HNO3(aq) h. NaCH3COO(aq) + HCI(ag) –
  • Magnesium metal reacts with iron (III) chloride in water to form aqueous magnesium chloride and iron. Â What kind of reaction is this? Will this reaction occur? Explain Write the skeleton equation be…
  • . The first-order rate constant for the decomposition of N 2 05, How many minutes will it take for the quantity of N2 O to drop to 1.9×10-2 mol ? 2N2 05 (g)-4NO2(g) + 02(g) Express your answer using…
  • How do you calculate the concentration of EDTA?. Concentration of CaCl2 (aq) (M): 0.00 0 544 mcad = NEDTA . 1. 36 * /D 5 Measure Trial 2 3 4 5 Volume of CaCly (aq) (mL) 25.00 25.00 25.00 25.00 Final b…
  • How many valence electrons are in the element gallium? Explain how you determined the number.  2. Describe the factors that influence ionic bonding.  3. How do you determine the type of coval…
  • low carbon content but high hydrogen and oxygen contents
  • . Give the polarity of the given molecules. Please include the polarity Electronegavity of the molecule and its VSEPR model with dipole moment. 1. H20 2. NH3
  • QUESTION 6 Which element is oxidized? Zn + Cl2 -> ZnCl2 O 1. Zn O 2. CI 3. Neither
  • Learning Task 2 : May the force be with you Tasks: 1. Choose one (1) type of intermolecular force (IMF) 2. Illustrate at least five (5) molecules that exhibit this IMF 3. Relate this type of IMF to si…
  • The label information states that in each 15mL teaspoon, there is 1200 mg of magnesium hydroxide. The dosage for adults is 2 to 4 teaspoons. Please be specific about any additional information needed….
  • In the nucleus, when a neutron changes to a proton, the nucleus fires off an
  • If 25.0 g of Aluminum cool from 310 oC to 37 oC, how many joules of heat energy are lost by the Al? The specific heat of Aluminum is 0.897 J/g•K
  • Observe the significant figures rules in your calculations). Part A 1. The specific heat of water is 4.18 J/(g×oC). How much heat energy is required to raise the temperature of 70.00 g of water by 20…
  • How to determine the number of electrons in the ion O-2
  • If 20.0 g of glass is heated from 38 deg C to 300 deg C, how many joules of heat energy are gained by the glass? The specific heat of glass is 0.84 J/g•K
  • Could you please help to solve the following question in detail with the XRD DataÂgiven below? Thank you very much.. . Determine the crystal structure of the sample. . Give the miller indices for the…
  • . Part A The first-order rate constant for the decomposition of N2 05, V 2N205(g)-4NO2(g) + 02(8) How many moles of N2 Os will remain after 7.0 min ? at 70 C is 6.82 x 10 3 s 1 . Suppose we start Ex…
  • I need the mass in one 15 ml dose. The label says for 15ml we should have 1200mg.. . Calculations (typed or from your notebook) o Calculate the mass (mg) of magnesium hydroxide in each sample. o Calcu…
  • . Video Quiz: Molarity deo Quiz: Molarity ed: Feb 25 at 2:21am liz Instructions h and take notes on the molarity videos as if you were sitting in class. Then complete the quiz questions! Question 2 …
  • We did a titration using Vinegar for milk of magnesia. I need to find the the mass of magnesium hydroxide in each sample. For sample one, we used 5.608 grams of Milk of Magnesia and it took me 18.02 m…
  • . 1. Write an equilibrium constant expression, Kc, for the following reactions: e. CaC03(s) s Cools) -..+ C02 (9) r. (CH3)2CO(|) s (CH3)2CO l9) 3. At 250 0C , l.lO mol P05 (9) was introduced into a …
  • how many moles of glucose (180.16g/mol) are needed to make 2.5 L of 0.473 M solution?
  • . Application: Phase Diagrams (21 points; 3 points each) Refer to the phase diagram below when answering the questions on this worksheet. Begin by adding S, L, and G to the three regions of the phas…
  • (i) Define the term photon. Then, (ii) state whether a photon of blue light or red light has higher energy and (iii) explain how you made your determination. Be sure to (iv) include an equation tha…
  • How does temperature affects to the solubility of a substance?  2. Describe how the a certain matter change in a different phase.  3. Compare and contrast the crystalline solid and non crysta…
  • A set of five solutions for a standard addition experiment are prepared by delivering 10 mL of the unknown sample and increasing volumes of standard (0, 5, 10, 15, and 20 mL) into five separate 50-m…
  • Please give some specific examples for elements, compounds, homogeneous mixtures, and heterogeneous mixtures. Please give some specific examples for physical change and chemical change. What is conver…
  • ANSWER THE FOLLOWING. SUBJECT: Physical Science TOPIC: Origin and the Formation of the Elements LESSON CODE: M2W2 MODALITY: MOFF ACTIVITY NO: 2 NAME: SECTION: General Directions: Complete the crosswor…
  • The temperature of the water and the gas inside the bubble before it implodes is 290 K The bubble is spherical and has a radius of 5 mm The implosion of the bubble is too fast for heat transfer to occ…
  • ANSWER THE 2 TABLES Â. Summanen the intermolecular forces of attraction and describe the proportion of substance. IMFA TYPES OF SUBSTANCES THAT EXHIBIT ATTRACTION [Interacting partlolec] Ion – lon Io…
  • generated (%) 1.5 1.0 0.5 0 2007 2009 2011 2013 2015 2017 Year 0 1 1 Describe the changes in the percentage of electricity generated in the UK between 2007 and 2017 using: . oil . solar energy. Use da…
  • The decay scheme for 198 Au is shownÂbelow. 1. Explain the relative intensities of the threeÂb – Âdecays. 2. What are the three QβÂenergies? 3. What percentage ofÂb – Âdecays result in a 411.8 …
  • . Ten grams of benzene was released into a closed environmental chamber containing 1.0 m3 of air, 0.1 m3 of water and 0.01 m3 of octanol present as a separate liquid phase. The chamber has a fixed t…
  • ANSWER A AND B Â. Why are most atoms held by chemical bonds? b. A chemical bond or intramolecular force is a force that holds atoms in a molecule together. Do you think there will also be an attracti…
  • ANSWER THE TABLE Â. 1. Complete the following table by indicating the electronegativity difference of the atom present, name of the Compound and its uses, molecular gnometryishape, and identifying th…
  • Is mixing sodium hydrogen carbonate and hydrochloric acid chemical or physical reaction and why?
  • Which of the following is NOT a hazard class typically carried in non-bulk bags? O A. Organic peroxides O B. Flammable liquids O C. Explosives O D. Oxidizers
  • What are the plugs that closed head drums openings are closed off with called? O A. Bungs O B. Bongs O C. Domes O D. Pongs
  • 1)A nitric acid solution is labelled 6.0%W/W nitric acid mass.what mass, in kg, of pure solute is in 2.71 kg of nitric acid? 2) Any shipment of peanuts that contains more than 25 ppb of this dangerous…
  • The manufacturer quotes Bi subsalicylate as 262.5 mg per tablet, using the molar mass of bismuth subsalicylate of 362Âg/mol and the Bi atomic mass of 208.98 g/mol convert this to Bi. Expected mass of…
  • Which of the following hazard classes is common content for non-bulk packaging carboys? O A. Explosives O B. Organic peroxides O C. Flammable solids O D. Corrosives
  • Imagine a world in which all the elements existed, but they couldn’t form any chemical bonds with each other. What kinds of substances could exist in such a world? What kinds of substances could not e…
  • Why do you need to do the chemical tests of the unknown and known side by side? Â Briefly describe how you are going to figure out the chemical formula of the unknown.
  • Reference — Equation 5: Â. Table 3 – Reaction between acetic acid and sodium bicarbonate Mass of NalElCflI [g] Volume of vinegar Ti Initial temperature of TfFinal temperature of 3 {EL} 1water (“{…
  • . 0.025 liter of unknown acid titrated with 0.110 M of NaOH E- uivalenoe oint so volume of NooH added Liter Total volomo liter 2.9 4.1 _ 0-025 – 2o ooos ooze – 1oo o.o15 0.040 1. Calculate the Kd of…
  • Reference — Equation 5: Â. Table 1 – Calcium chloride data Trial Mass of CaClz (2) Volume of water (mL) T Initial temperature of T Final temperature of water (‘C) water (‘C) Trial 4.89 100 19.1 24.3…
  • Calculate the moles of O atoms in 84.8 g of Sr(NO 3 ) 2 . Â ____________ mol O atoms
  • Convert 9.16 kg to Gg, hg, and µg. 1 Gg = 10 9 g, 1 hg = 10 2 g, 1 µg = 10 -6 g
  • Construct the isobaric (pressure = 1.00 atm) temperature-composition phase diagram for the binary system of n-butanol and water from the data given below. Use the mole percentage of water as the co…
  • Write a thermochemical equation including experimental values  0.50 g of magnesium oxide powder measured to 0.01g. 50.0 mL of 1.00 mol/L hydrochloric acid
  • calculate enthalpy change per mole of magnesium  0.50 g of magnesium oxide powder measured to 0.01g. 50.0 mL of 1.00 mol/L hydrochloric acid
  • A gas has a density of 0.791 g/L. What is the molar mass of this gas?
  • The density of a gas is 0.0892 g/L at STP. What are the molar mass and the identity of the gas?
  • Balanced the reaction: Vanillin + Acetic Acid =>
  • What is happening to the glycine amino acid through the titration process in terms of structure and charges? Ânote = the titration was made with acid HCl and NaOH base. 50 ul of acid until reaches 1….
  • Draw the Lewis structure and explain which of these molecules has a smaller bond angle. a) H3O+ b) H2O Â Determine for each of these molecular geometries the following: Lewis structure electron geome…
  • How would you describe reaction outcomes to a college student?
  • Show the solution:  1. What is the energy of activation for a reaction that has a specific rate constant equal to 3.6 x10 —2 s —1 at 273K and a specific rate constant = 7.2×10 —2 s —1 at 373…
  • Please answer 1,2 and 3. Using the data in table 5 and 6 : 1.-Write the complete ionic equation for each reaction that produced a precipitate. 2.- Write the net ionic equation for each reaction that p…
  • calculate enthalpy change per mole of magnesium  0.50 g of magnesium oxide powder measured to 0.01g.
  • Write a thermochemical equation including experimental values  0.50 g of magnesium oxide powder measured to 0.01g.
  • When you measure the heat of solution for calcium chloride mixed with water, in one trial you used 100 mL of water and in another trial, you used 75 mL of water. Would you expect the heat of the solut…
  • Draw the heating curve for Zinc as it is heated from solid to a gas. Used color periodic table to determine the melting point and boiling point and label them on your diagram.
  • Identifying Unknown Using Stoichiometry You are working in an analytical chemistry laboratory as a technician. During an inventory check, you find two reagent bottles with incomplete labels attached. …
  • Compound name: sulfur hexabromide Chemical formula: Lewis structure: 3-D VSEPR diagram with bond angles: VSEPR shape: Polarity: Type(s) of intermolecular forces: Compound name: tellurium tetrachloride…
    • The compound carbon monofluoride triiodide, CI;F, is a polar compound even though its molecule has a tetrahedronape. Using a three-dimensional VSEPR diagram as a part of your answer, explain why ca…
  • Compound name: silicon tetraiodide Chemical formula: Lewis structure: 3-D VSEPR diagram with bond angles: VSEPR shape: Polarity: Type(s) of intermolecular forces: Compound name: calcium iodide Chemica…
  • Complete the tables for each substance below by stating the chemical name, chemical formula, drawing the Lewis structure, drawing the three-dimensional VSEPR diagram, stating the shape of the molecule…
  • . 6. Draw and label the molecular orbital (MO) diagram for CO. Determine the MO ground state electron configuration, the bond order, and the magnetism for this molecule. (20 pts) Page 8 of 8
  • . 5. Determine the type (I = ionic, M = molecular/covalent, binary acid = BA, oxyacid = OA) and name or give formulas for the following molecules. (12 pts) A. N3F6 type: name: B. Cr(NO2) 3 type: nam…
  • . 4. Draw the best 2D Lewis structure and the 3D structure for each of the following. Determine the electron pair geometry (EPG), the molecular geometry (MG), the bond angle (BA), and whether the mo…
  • . Single Bonds Multiple Bonds H-H 432 N-H 391 149 C= C 614 H – F 565 N-N 160 I-C 208 C=C 839 H-CI 427 N-F 272 1-Br 175 O-O 495 H – Br 363 N-CI 200 C-0* 745 H – 1 295 N-Br 243 S-H 347 C=O 1072 N-O 20…
  • . I. Multiple Choice DIRECTION: Choose the letter of the correct answer. Write your answer on a yellow paper. 1. Boiling point is the temperature when the temperature is at 100 and A. 217 atm pre…
  • explain why one of the three structures for C2H2Cl2 is non polar while the other two are polar? draw all three structure possible lewis structures of NO3?
  • The calcium chloride that you used came from a product called “MELT” by Snow Joe. This product claims to melt ice that is -25.0 °F. Using the literature enthalpy of solution for calcium chloride of -…
  • Question number 3 is the one I am having trouble with. Information – Uhenficatfleacfian The reaction to be studied is the catalytic decomposition of hydrogen peroxide by the iodide anion {fiom pot…
  • ethylene glycol (C 2 H 6 O 2 ) is used as antifreeze. It is used in a mixture that is 52% ethylene glycol by volume. At 20 0 C, the density of ethylene glycol is 1.11 g/mL and the density of water is …
  • Given the standard reduction potentials for an element A, at 25 .C: A2+(aq) + e- – A*(aq) E10 = 0.239 V A4+(aq) + 3 e- – A*(aq) E20 9 = 1.628 V Use these two half-reactions to set up a spontaneous gal…
  • For an element X, the following standard reduction potentials exist at a temperature of our study: x3+(aq) + 2 e- – X*(aq) E10 = 1.195 V X4*(aq) + 3 e- – X*(aq) E20 = 1.242 V If [X*] = 0.198 M, [X3+] …
  • We know the following standard reduction potentials for element M at 25 .C: MO4 (aq) + 8 H*(aq) + 5 e- -> M2+(aq) + 4 H20(1) 810 = 1.618 V MO2(s) + 4 H*(aq) + 2 e- -> M2+(aq) + 2 H2O(1) E20 = 0….
  • . 6. Draw and label the molecular orbital (MO) diagram for CO’. Determine the MO ground state electron configuration, the bond order, and the magnetism for this molecule. (20 pts) Page 8 of 8. Sin…
  • https://www.coursehero.com/file/107632123/IntroGasLaws-HWpdf/
  • How many moles of He atoms are there in a sample containing 8.20 × 1022 helium atoms?
  • How many moles are equal to 3.61 × 1024 particles of potassium chloride?
  • The nucleus of an atom acts as a magnet. As protons are added to the nucleus the “magnet” gets stronger. What do you think this means about how tightly the electrons are held to the atom across a row?
  • Elements in the same period have increasing atomic number, left to right, and increasing electron number, left to right. Would adding electrons within the same energy level make the atom larger? Expla…
  • . Question 2 Not yet answered Points out of 2.00 | Remove flag Calculate the concentration of [H30*] present in a 0.050-M solution of H2S. Answer:
  • . actual yield 0 ‘ = — A) yield theoretical yield X 100 _ amount of product recovered _ X 100 theoretical amount of product. 1. Mass (g) of aspirin formed NG 4 Info 2. Maximum amount (g) of aspiri…
  • Activity 3A: The Thickness of a Thin Aluminum Sheet – Ms …
  • Which of the following correctly lists four atoms from the largest to the smallest radius? (Choose the correct one, and then explain why the others are INCORRECT.) a. Lithium, boron, oxygen, neon b. L…
  • Hello, I am wondering why the first equation is “reversed” and why the second equation is left “as it is” when the first and second look exactly alike to me.  Thank you! Laura. QUESTION REVIEWIN…
  • I need help with a stoichiometry problem. We are doing the Alka Seltzer mini lab and I am trying to find how many grams of the excess recatant which is CO2 is left over after an alka seltzer tablet di…
  • Please fill in the blanks and add the strongest. I am confused for the last , so I really appreciate if you can use the first two diagrams as a frame of reference. Thanks again! Â Â. Molecule Molecu…
  • Answer all questions completely IN YOUR OWN WORDS AND SHOW ALL WORK:. 5. Calculate the solubility of Mg(OH)2 in 0.10 M Mg(N03}2 . Calculate the solubility in grams/liter. Would Mg(OH)2 be more, or les…
  • How to identify the following compounds according to their functional groups ?. Paree los siguientes comppuesto deacuerdo a sus grupos funcionales. O O a. H3C CH2 C- OH b. H3C CH CH3 c. H3C- C CH3 d. …
  • Label each variable in the Rydberg equation with the correct units.
  • . Content X MasteringChemistry: Chapter 7 X Content X *Homework Help – Q&A from C X + V X -> C session.masteringchemistry.com/myct/itemView?assignmentProblemID=183492742 G <Chapter 7 Part …
  • How to match the groups with their respective answers and how to get there ?. . Elemento con 18 protones A. Alcalinos – Elemento con 37 protones B. Metal de Transision – Elemento con 20 protones C. Al…
  • The boiling point of SeOF2 molecule (diagram D) is less than the boiling point of SeOCIz (diagram E). f.) Identify the type(s) of intermolecular force(s) that the two substances have in common. . Lond…
  • If 120 mLmL of a 1.3 MM glucose solution is diluted to 500.0 mLmL , what is the molarity of the diluted solution? Â Â Â Â Express your answer using two significant figures. 2. Which metal in th…
  • Determine the mass number of a beryllium atom with 5 neutrons. 2. The atomic masses 121 Sb and 123 ÂSb of and are 120.903824 and 122.904222 amu, respectively. The average atomic mass of anti…
  • Would an atom with only one energy level or 7 energy levels have an easier time attracting electrons? Explain.
  • 1-Describe the similarities and/or differences between heating and burning the magnesium metal. Did either heating or burning produce a chemical change? Explain your answer  2-Describe the similar…
  • Arrange the following elements according to increasing atomic radius: Na, C, S, Fr, I
  • Do elements in the 1st period or the 7th period have a higher atomic radius ? Explain.
  • Question 5: acid_base_buffer_plus_pH A buffer solution is created by adding 1.00 moles of NaA to 1.00L of 1.00 M HA. The pH of this solution is found to be 4.7447. To this solution 0.45679 L of 0.81 M…
  • Answer the rest of the questions. Hand write them so I can understand. SHOW ALL WORK:. Prelab: Before coming to lab: Make an outline of procedures in your lab notebook as described in the Laboratory N…
  • PLEASE MESSAGE ME IF YOU NEED MORE DETAILS  MENDELEEVS PERIODIC TABLE:  https://docs.google.com/document/d/1eDzCILYavvbuN9zsjSdF392TlJpPQ0yzzyd0W3xmIX8/edit?usp=sharing    In this activity y…
  • . MOLAR VOLUME OF A GAS Pre-Lab Assignment Name Section 1. To generate H2 gas in this experiment, magnesium metal will be reacted with hydrochloric acid. A. Write the balanced equation f…
  • Phosphorus AcidÂ(H 2 PO 4 ) can be prepared from Phosphorus triiodideÂ(PI 3 ) according to the reaction: Balance the equation. If 150 grams of PI3 (MM= 411.7 g/ mol) is added to 250 milliliters of H…
  • PLEASE MESSAGE ME IF YOU NEED MORE DETAILS  MENDELEEVS PERIODIC TABLE:  https://docs.google.com/document/d/1eDzCILYavvbuN9zsjSdF392TlJpPQ0yzzyd0W3xmIX8/edit? usp=sharing    In this activit…
  • For the reaction, 2Ni + 3Cl2Â→ 2NiCl3: 7.5 moles of chlorine reacted with 8 moles of nickel. How many moles of nickel (III) chloride can be produced?  If 3 moles were produced, what is the percen…
  • What is the mass of the sample after heating is complete? 1.025 g What is the mass of the sample before heating begins? 1.586 g How many moles of water were in your sample? 0.0311 moles How many m…
  • CHEM 152L  What do you think of your distance learning kit? What are you most excited to use in it? Are you excited about the same things as your classmates? Please post your impressions of your…
  • . Consider the following enthalpy diagram for the reaction given in the diagram. Based on the reaction pathway illustrated identify the reaction as either exothermic or endothermic. (A one-word answ…
  • Assignment Use a periodic table to help you answer the following questions. 1. Which element in the second period has the greatest atomic radius? 2. Which of the group 13 elements is the largest? 3. O…
  • 1)Calculate the pH for the following concentration: [H 3 O + ] = 3.24 x 10 -3 M 2)Calculate the pH for the following concentration: [H 3 O + ] = 2.19 x 10 -5 M 3)Calculate the concentration for the fo…
  • The next three (3) problems deal with the titration of 321 ml of 0.501 M carbonic acid (H2CO3) (Kal = 4.3 x 10" , Kaz = 5.6 x 10 11) with 1.3 M KOH. What is the pH of the solution at the 2nd equi…
  • SHOW YOUR WORK Use these conversion factors: 45 WA = 10 CV 1 CV = 4.2 PX If you have 80 WA, how many PX is that equal to?
  • Where did the 1.07 come from?. Initial M = [(2 drops)(0.040 M)] / (12 drops) = 0.0067 M H* in Experiment 1: (1.07 x 10-5 L)(2 drops)(0.10 M) = (12 drops)(1.07 x 10-5 L)( M)
  • please provide answers thank you. Which of the following is NOT true What is the kind of bond between B 1. 7. When atoms in a molecule have the Il. Which of the following has the most about molecules?…
  • all three please and thank you. Question 1 1 pts (Q91) The activation energy for a certain reaction is -165 kJ/mol. If the rate constant is 118 M"s" at 14.5 .C, what will the numerical value…
  • Saber la respuesta de estas 2 preguntas. 3. Indique el orden de elucion de los siguientes compuestos de una columna de HPLC con empacamiento de fase normal: a) acetato de etilo, acido acetico, dimetil…
  • . 6. Kinetic data was collected for the following reaction at 298 K. 2AB(g) —) 112(9) + 82(9) 3. Use Excel to create graphs of [AB] vs time, 1/[AB] vs time, and . ln[AB] vs time. Insert a linear t…
  • for the following figure showing delta Gnott for a chemical process plotted against absolute temperature. We can conclude which of the following?: a) deltaHnott<0, delta Snott<0 b) deltaHnott&lt…
  • What is the energy required to evaporate two moles of liquid water given the following equations: 2H 2 (g) + O 2 (g) → 2H 2 O(g)       ∆H = -483.6 kJ       2H 2 (g) + O 2 (…
  • SHOW YOUR WORK What is the mass (in g) of 26.2 cm of nickel?
  • Cardiovascular disease remains prevalent in the United States. Choose a cardiac disorder and post the following information about the cardiac disorder of your choice: 1) Latest research about the diso…
  • Answers to CTQS (0.5 pts each ) CTQ 1 Why does adding water to the ice bath help cool the reaction mixture more quickly? CTQ 2 Based on the chemical properties of esters, what do you think would happe…
  • How to know the electrons of these groups ? Alkaline Transition metals Alcalinoterreos Metalloid Noble gas No metals
  • ¿Cuántos mililitros de HCl 5.0 M se necesitan para preparar 2.0L Âde HCl Â0.20M? / How many milliliters of 5.0 M HCl are needed to prepare 2.0L Âof HCl Â0.20M?
  • Question 4 0 / 1 pts During a scientific experiment, the experimenter measured the mass of two different liquids each in a vial with a lid. The two liquids were then combined into one vial and the lid…
  • . A 0.570 in aqueous solution of KBr has a total mass of 72.1} g. What masses of solute and solvent are present? 67.8 mass of KB: : In correct 4.2 mass of water: Incorrect gHgo
  • Consider 25.1 g of sodium bicarbonate is reacted completely with 1.03 kg of vinegar. The starting temperature of the vinegar is 25.7 ºC . What would the final temperature of the reaction solution be …
  • You dissolve 5.03 g of sodium bicarbonate (molar mass 84.007 g/mol) in 100 g of distilled water if the temperature of water decreases by 2.98 K what is the heat of solution for sodium bicarbonate? You…
  • You have a 1.04 kg block of ice at -23.2 °C. How much energy is required to completely melt the block of ice? The specific heat capacity of ice is 1.864 J∙K−1∙g−1 and the enthalpy of fusion i…
  • Preguntas de Informe Enumere los pasos para preparar 500 mL de NaOH 0.50M. ¿Cuántos mililitros de HCl 0.45 M contiene 7.3g de HCl? ¿Cuántos mililitros de HCl 5.0 M se necesitan para preparar…
  • If you completely dissolve 4.234 g of calcium chloride in 98 mL of water, theoretically how much energy is released? Make sure to round your answer to the correct number of significant figures. We wil…
  • What is the specific heat capacity of a 100.6 g of a liquid that rises 11.21 °C when supplied with 2,468 J of energy. Your response will be assumed to have units of J g-1 K-1. Make sure your response…
  • You heat a 50.2 g sample of hexanes (specific heat capacity 2.270 J g-1 K-1 using a heater using 183.3 W of power for 10.0 seconds. If the initial temperature is 21.7 °C what is the final temperature…
  • How much energy does it take to raise the temperature of 12.3 g distilled water from 17.2°C to 33.3°C? Make sure your answer has the correct number of significant figures. We will assume the answer …
  • Consider 4.09 g of methane(CH4) is burned completely and all the heat from this combustion is absorbed by 1.07 kg of 19.9 ºC water. What would the final temperature of the water be in ºC after the c…
  • Can I please have some help with how to prepare a 20.00 µg/mL iron solution from a 1,000 mg/mL iron standard solution using 10-mL and 50-mL volumetric pipets and 500-mL and 1,000-mL volumetric flasks…
  • Solve it in Excel and walk through the process step by step to illustrate how it’s done. Also, for the solution part, write the solution. Pmblern Solving Write all The steps for the statistioll testin…
  • Hi, can i have some help with how to prepare a 20.00 µg/mL iron solution from a 1,000 mg/mL iron standard solution using 10-mL and 50-mL volumetric pipets and 500-mL and 1,000-mL volumetric flasks, p…
  • Please round answer to the nearest whole number The percent composition of Li in Li O is % Type your answer..
  • Mass to mass and Percent Yield problem: Iron reacts with oxygen to form Iron (III) oxide. 4Fe + 3O2 —> 2Fe2O3. a. If 200.0 g of iron reacts, what is the theoretical yield of iron (III) oxide? b. …
  • limiting reactant problem: Nitrogen gas reacts with hydrogen gas to produce ammonia: ___N2 + ___H2 —> ___NH3 *not balanced a. If 100.0 g of nitrogen gas reacts with 20.0 g of hydrogen gas what ma…
  • What is the specific heat capacity of a Â100.6 g of a liquid that rises 11.21 °C when supplied with 2,468 J of energy. Your response will be assumed to have units of ÂJ g-1 K-1. Make sure your re…
  • Let’s revisit the low-coordinate chromium tris-amide complex in the previous problem set (question 8f). We will look in detail at L- and LX-type ligand behavior. Recall that L-type ligands are comp…
  • mass-mass problem: One series of reactions that inflates air bags in automobiles is the decomposition of sodium azide (NaN3). Determine the theoretical yield of N2 produced if 100.0 g of NaN3 is decom…
  • mass-mole problem: If 25.0 grams of carbon dioxide are used in photosynthesis how many moles of glucose (C6H12O6) could be Produced according to the following equation: 6CO2 + 6H2O —> C6H12O6 + 6…
  • You have a 1.04 kg block of ice at -23.2 °C. How much energy is required to completely melt the block of ice? The specific heat capacity of ice is 1.864 J∙K−1∙g−1 Âand the enthalpy of fusion…
  • mole-mass problem: Water decomposes to produce hydrogen gas and oxygen gas. How many grams of water would be required to produce 10.0 moles of hydrogen gas?
  • graded) Show Split Question View A Jefferson Score: 37 / 90 (41.11%) Save & Close THIC Cquanon 1 71 0 4074- Submit for Grading total moles A LOU, JU YOU TICCU LU ATIOWY, . the number of moles of c…
  • mole-mole problem: One disadvantage of burning propane (C3H8) is that carbon dioxide is one of the products. The released CO2 increases the growing concentration of CO2 in the atmosphere. How many mol…
  • . Question 32 What is the [H+] concentration if the pH is 7.13? Not yet answered Marked out of Answer: 1.00 Question 33 What is the [H+] concentration if the poH is 7.47? Not yet answered Marked out…
  • . Question 12 Calculate the hydroxide ion concentration, [OH-], in 0.095 M HBr. Not yet answered Marked out of 1.00 Answer: Question 13 Calculate the hydroxide ion concentration, [OH-], in 1.61 M HN…
  • QUESTION 5 If the mass of a full Alka-Seltzer tablet is 3.50 g, what is the mass of NaHCO3 in the tablet (in g)? Provide your answer with 3 significant figures.
  • . Question 24 Not yet In the following acid-base reaction, identify the compounds as acid, base, conjugate acid, and conjugate base. answered Marked out of NH3 + H20 – NH4+ +OH 1.00 NH3 Choose.. HO …
  • mg of an unknown protein are dissolved in enough solvent to make 5.00 mL of solution. The osmotic pressure of this solution is measured to be 0.0445 atm at 25.0 °C. Calculate the molar mass of t…
  • . Suppose you are titrating vinegar, which is an acetic acid solution of unknown concentration, with a sodium hydroxide solution according to the equation HC2 H302 + NaOH -> H20 + NaC2H302 If you…
  • Must show a screenshot from the lab of the combined combination and solution here. Link to the virtual lab is here:Â http://chemcollective.org/vlab/90 Â. 2. (3pts) Using water and the reagents provi…
  • When a resident is cognitively impaired, does it really matter whether he/she is attractively dressed? Are we just trying to make an impression on visitors and other residents? If the confused residen…
  • Define and give examples of the different physical states of matter What is the periodic table of elements? Why is it organized the way it is?
  • 1-You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation…
  • . Activity 3.9 Activity Title: ELEMENTS and COMPOUNDS Warm-up (Pre-questions) 1. Define and differentiate elements, compounds and mixtures. 2. Give examples of elements, compounds and mixtures. I. W…
  • What is the concentration of H + atoms in lemon juice?
  • Data from experiment: Trial 1 1.9 mL of H20, 0.8 mL of 1.0 M HCl, 0.8 mL of 2.724 M of acetone, 0.5 mL of 0.005 M I2 Solution Trial 1 = 225 seconds Trial 2 1.9 mL of H20, 0.8 mL of 1.0 M HCl, …
  • Data from experiment: Trial 1 1.9 mL of H20, 0.8 mL of 1.0 M HCl, 0.8 mL of 2.724 M of acetone, 0.5 mL of 0.005 M I2 Solution Trial 1 = 225 seconds Trial 2 1.9 mL of H20, 0.8 mL of 1.0 M HC…
  • . Part I Constructing a calibration table and curve Table 3. Absorbances of the calibration (standard) solutions Wavelength, nm: Hints: The wavelength is expected to be 720nm. Che Concentration Test…
  • Carbon monoxide, CO, has an intense infrared absorption due to the large value of the dipole moment derivative, du/dRR. , and the intensity of its IR absorption bands can be used as a means of meas…
  • the last question Number 8 of the lab is what I need help with. It’s 2 questions in number *. What effect? and would the calculated volume be too high or too low? Thanks. 8. A student noticed that the…
  • Reactivities Report:  A. Copper and Iron     Copper metal + Iron (III) chloride → equati…
  • Numbe of atoms and sets of lone pairs surrounding central atom for cho2-
  • Write the complete chemical equations for each of the following: hydrolysis reaction that produces propanol addition reaction that produces bromo butane hydrogenation of butene oxidation of ethane iod…
  • Need help…..solve this problem Â. Previous Problem Problem List Next Problem (1 point) Two chemicals A and B are combined to form a chemical C. The rate of the reaction is proportional to the pro…
  • . Suppose you are standardizing a sodium hydroxide solution with KHP (molar mass=204.2 g/mol) according to the equation KHP + NaOH – H20 + NaKP You prepare the standard solution from 0.293 g of KHP …
  • Calculate the mass percent of oxygen in perchloric acid(HCIO4). Write the answer in the following format. xx.xx (%)
  • The density of Âtoluene is 0.855g/mL. What volume of toluene would have a mass of 15.00g. Show the detailed calculation and appropriate set-up wherein the density value is used as a conversion factor…
  • Paragraph Styles IN Editing Voice Font IN Sodium Polyacrylate ONLINE 1. Which beaker lost the most mass during the first week? $5.06 g (1 pt) 2. Which beaker lost the most mass going from Week 3 to We…
  • Which is the name of the following compounds ?. Escriba el nombre de los siguientes compuesto: SizH6
  • . 41. Directions: Compute for the following and write your answer on the table provided. The following is the list of scores in Research 2 subject of Grade 12. Compute for the frequency, percentage …
  • What errors or inherent limitations of the procedure used in this lab might have changed the amount of limonene you have calculated to be present in orange rind as compared to the amount that would ac…
  • A man receives a platinum ring from his fiancée. Before the wedding, he notices that the ring feels a bit light for its size, so he decides to determine its density. He places the ring on a balance a…
  • So, I’m trying to graph this on excel but my time in seconds always ends up on the y and HIO3 on the x axis. I was wondering if you can help with creating the graph and then asking the question below …
  • 50 g of magnesium oxide powder measured to 0.01g.  calculate the enthalpy change per mole of magnesium  write a thermochemical equation including experimental values  experimental values: Â. …
  • What is the formula for Celsius -> Kelvins and vice versa?
  • Use the following if applicable: C1V1=C2V2 , %W/W, % W/V, or % V/V. Answers should have the solutions and sentences describing how you will prepare each reagent. Prepare 1L TAE buffer from 10X conce…
  • Write the (a) balanced equation for the formation of liquid water from hydrogen and oxygen gas, and use it to explain the following terms: (b)Â chemical reaction, (c)Â reactant, Â (d)Â produ…
  • Which student’s measurements were more precise? ) Which student’s measurements were more accurate?. 6. The mass of a piece of copper (known mass = 4.750 g) is measured three times by two different stu…
  • answer asap with proper units as well!!. 488 mm Hg = atmospheres * Your answer -25°c = K * Your answer The temperature of 4.0 L of gas in increased from 12°C to 20°C. What is the new volume of the …
  • . Preguntas de Informe Report Questions 1. Enumere los pasos para preparar 500 ml de NaOH 0.50M. 1. List the steps to prepare 500 mL of 0.50M NaOH. 2. Cuantos mililitros de HC10 45 M contiene 7.3g d…
  • To the correct number of significant figures, what is the volume, in milliliters, of the liquid in the graduated cylinder?. 6
  • Determine the number or atoms in 3.00 ml of mercury (Hg) ?. The density of mercury (Hg) is 13.5 g/ml.. Determine the number of atoms in 3.00 mL of mercury (Hg). (La densidad de mercury (Hg) is 13.5 g/…
    • What is the difference between ionizing and non-ionizing radiation? 2) How does Beta decay occur? 3) Which process of gene expression uses mRNA as a template to produce a protein? 4) What is the ge…
  • Which of these is an example of a formula for a pure substance ?. (a) None of the these (b) (c) (d)
  • . 2) Consider the use of Merrifield’s scheme for the chemical synthesis of proteins. We are adding a new amino acid "A to a pre-existing ofligopeptide chan "3 that is covalently attached t…
  • The Pepto-Bismol tablet also contains calcium carbonate (350 mg per tablet), magnesium stearate, red 27 aluminium lake dye and insoluble silicon dioxide and sodium starch glycolate. Potentially we cou…
  • please explain give complete answer no copy paste. 1. Real-life connections: Crystallization of seasalt from seawater Consider the following solubility data to evaluate whether the method of making a …
  • . Calculate the volumes of the stock solution and nitric acid solution to get the total volume of 20.00 mL and the assigned concentration of copper [ll] ion. Table 2. Concentrations of standard solu…
  • Calculate the instantaneous rate of consumption of hydrochloric acid at 60s and 240s. 3. Calculate the instantaneous rate of consumption of hydrochloric acid at 60 s and 240 s. Table 1 Concentration o…
  • For each of the following molecules, draw the 3D Lewis structure then, give the electronic geometry (EG), the molecular geometry (MG), and the bond angle (BA) for each. Finally, determine if the molec…
  • calculate the enthalpy change per mole of magnesium  write a thermochemical equation including experimental values  experimental values:. Magnesium Oxide Initial Temperature 22 C Final Temperature…
  • . 5. Check the absorbance at the given wavelengths in your colorimeter (the table below) and build the graph showing the dependence of absorption on the wavelength (chose to insert Scatter with Smoo…
  • Calculate the average rate of consumption of hydrochloric acid from 0 s to 120 s and from 180 s to 300 s.. 5 nelson chem 12 Unit 3_Energy F. X tdsb.elearningontario.ca/content/enforced/20192156-BL_SCI…
  • Calculate the average reaction time of trials 1 and 2. Record this value in Data Table 1 in theÂrow labeled “Average Reaction Time.”
  • mole-mass problem: Water decomposes to produce hydrogen gas and oxygen gas. How many grams of water would be required to produce 10.0 moles of hydrogen gas? 17. mass-mole problem: If 25.0 grams of…
  • 30 Lewis structures Name: For each of the following molecules, draw the 3D Lewis structure then, give the electronic geometry (EG), the molecular geometry (MG), and the bond angle (BA) for each. Final…
  • Results Table: Part B Cylinder 1. Density of first volume of saline 2. Density of second volume of saline 3. Density of third volume of saline 4. Average density 5. Density range 6. % error Part C Pip…
  • EXERCISE Writing Equilibrium Constant Expressions I (NH4)2CO3(s) = 2 NH3(g) + CO2(g) + H20(g) [(NH4) 2CO3] [NH 3] [CO2] [H20] [(NH4)2CO3] Kc = [NH3] [H20]
  • Calculate the average rate of consumption of hydrochloric acid from 0 s to 120 s and from 180 s to 300 s. Â Â Â. 5 nelson chem 12 Unit 3_Energy F. X tdsb.elearningontario.ca/content/enforced/201921…
  • At 725 K, ∆G° = -15.7 kJ/mol for the reaction A (g) + 2 B (g) → 3 C (g). If the partial pressures of A, B, and C are 1.21 atm, 3.25 atm, and 0.235 atm respectively, what is the free energy for th…
  • Python 1. Suppose I have the variable greeting = “Hello there!” What is the value of this expression? greeting[7] 2. Suppose I have the variable greeting = “Hola!” What is the value of the following…
  • How do you this?. "This looks like some sort of matching game." -IN 7 3 Formula Red + Yellow = Orange Red + Blue = Purple 5 Yellow + Blue = Green
  • The hydrolysis of sucrose has a rate constant of 1.0 ×10-3 M-1s-1 at 37 °C. Calculate the rate constant of this reaction at 55 °C, given that Ea = 108 kJ/mol.
  • Isomer 2 (7 pts) Name butanal CAS Registry No. Tfus = K Lewis Structure or Bond-line diagram T boil = K Bonding Features Present (place an "X" in all boxes that are present in your Lewis str…
  • Show and draw the product of the polymerization hexamethylenediamine (HMDA) and hexamethylenediisocyanate (HMDI). (one step) and name the type of polymer formed? please explain no copy paste
  • A typical power plant, whether coal-powered or nuclear, generates around 50 gigawatt-hours of power per day. In nuclear plants, reactors usually reach temperatures of about 300 °C and the water us…
  • Calculate the pH for the following concentration: [H 3 O + ] = 3.24 x 10 -3 M Â Calculate the concentration for the following pH: pH = 4.52
  • ISOMER PAIR 3 (16 points total) C4HBO Please provide the information listed below for each isomer. Isomer 1 (7 pts) Name ethoxy-ethene CAS Registry No. T fus = K Lewis Structure or Bond-line diagram T…
  • Write the net reaction and rate law for the following reaction mechanism. Also circle any intermediates. 1) H2O2 + I- ïƒ HOI + OH- (slow) 2) HOI + I- ïƒ I2 + OH- (fast) 3) 2OH- + 2H3O+ ïƒ 4 H…
  • Write the rate law for the elementary reaction 2O2 (g) + Cl (g) Âarrowïƒ ClO (g) + O3 (g)
  • . Suppose you are standardizing a sodium hydroxide solution with KHP (molar mass=204.2 g/mol) according to the equation KHP + NaOH -> H20 + NaKP You prepare the standard solution from 0.290 g of …
  • Question 2 (2 points) Shape of a Molecule To answer this question, you can refer to the Electron and Molecular Geometry Chart. Use the Lewis structures from question 1 to predict the shape of the four…
  • Question 1 (3 points) Draw the correct Lewis Structures for each molecule on the list below and name each molecule following the rules for naming. You can print and fill this table to complete the ans…
  • Which compound is covalent and which is ionic ?. NO ON 101 – HCN A. Covalente – v Cr203 B. lonico
  • Which can act as a Lewis base? (Hint” Draw the correct structure, according to VSEPR Theory and include all lone pairs). A. (CH3)2NH2 + B. H3CO- C. P(CH3)3 D. Both H3COand P(CH3)3 Keywords: …
  • Size0/1/2/4 receptor is used with the posterior RINN
  • @Brightspace Help Center ? Question 8 0/ 1 Which Letter’s orbital-filling diagram violates the Pauli exclusion principle? A) [Ar] L L L L _ As 3d B) [Ar] LLLL 4s 3d C) [Ar] 1 LLLLL 4s 3d D) [Ar] 14 NL…
  • Exercise 1 Testing Hess’s Law In this exercise, you willÂmeasure Δ H Âfor two reactions and use your findings to predict Δ H Âfor a third reaction. IMPORTANT!  WearÂsafety goggles and gloves t…
  • How did they get the value for ε?. 3. A = ebc 0.0752 = (5375) c c = 1.39 x 10-5 [FeSCN’+]
  • Please help me with the lab. I have attached all the data and lab.Â. A Kinetic Study of the Oxidation of an Alcohol by chhromete Ion Calculations 1. Make a plot of Ina-Am) vs. time for each of the ?…
  • . Why must a solution of NaOH be standardized using a primary standard, such as KHP? Select one: O Volumetric flasks do not provide enough significant figures. O Bases are unstable in air. Sodium hy…
  • ) The dipole moment of the SeOF2 molecule (diagram D) is nonzero. Identify its molecular geometry and explain how its geometry and the polarity of its bonds result in a nonzero dipole moment.
  • The absorbance measured for a solution is 2.12 at Amax. If you add water to 10.5 mL of the solution to bring the total volume up to 65.8 mL, what will the new absorbance at the same Amax be? New absor…
  • Will is trying to identify an unknown element and uses mass spectrometry to get information about the mass and the abundance of a compound with only three naturally occurring isotopes. However, some o…
  • What would be the name of the compound P4I8 ?. 2 p Nombre el compuesto P418- octayoduro de tetrafosforo tetrafosfuro de octayodo yoduro de fosforo tetrayoduro de difosforo
  • . Arrange the following 0.10 M solutions in order of most acidic to most basic. From most acidic to most basic solution Drag and drop your selection from the following list to complete the answer: L…
  • Question about RadioChem Â. 234Th (B , 24.1 days) can be used as a tracer for thorium in various chemical investigations. It is obtained by "milking" a uranium (U, o, 4.51 x 10" y) &qu…
  • Determine the number of electrons in the F -1 ?. 2 points Save An Determine el numero de electrones en el ion F-1 1A 8A 18 2 H 2A 3A SA 6A TA He 15 16 17 1008 4.003 10 3 4 E Ne 12 Li Be 6.94 9012 10.8…
  • How does sweating Âwork to regulate body temperature? Fans can be an effective cooling strategy. How do room fans actually promote cooling? If you have a small bottle of hand sanitizer in your pock…
  • For the reaction 3 A + 4 B → 2 C + 4 D, what is the magnitude of the rate of change for [B] when [C] is increasing at 2.0 M/s? 2. What is the rate at which Br⁻(aq) disappears in the reaction be…
  • What is the charge of the ion most commonly formed by Sr ?. 3 points & Cual es la carga del ton formado mas comunmente por Sr? 8A 18 4A A 6A 7A He 14 15 16 17 9 10 N O F Ne 3 15 17 18 11 12 St P 8…
  • A 0.250 g sample of the weak acid HA (molar mass = 150.0 g/mol) is dissolved in 50.0 g of water. The freezing point of the resulting solution is -0.071°C. Calculate the value of Ka for this acid. Ass…
  • . 5. Using the tables of bond energies given in your book (Tables 3.3 and 3.4), determine the approximate reaction energy for the following chemical reactions. A. – TI OH + H20 B. CH4(g) + H20(g) &g…
  • Purpose To learn and apply the use of qualitative and quantitative analysis to determine different substances. Explanation The difference between qualitative and quantitative analysis is important to …
  • Hello, I need help, please? Â. Polyatomic ions: Charge Name Formula 1+ Ammonium ion NH Hydronium ion H,O’ 1- Hydrogen carbonate (bicarbonate) ion HCO3 Hydrogen sulfate (bisulfate) ion HSO Acetate ion…
  • Where did he get the values for C=A/eb? Specifically, why does eb=5375?. 2) A= Ebe – C=A = 0.094 = 1.749 x 10-3 Eb 5375 3) Mol FeSCN- = (1.749 x 10 ) (15ml) = 26.24 x 10-5 In3+ _ 0 05 0 0009051 – 0 01…
  • Of the following atoms, which would have a half-filled p subshell?
  • THE CHEMISTRY OF CANDY: MAKING TAFFY The ingredients in taffy contain sucrose, glucose, and triacylglyceroles and corn syrup in taffy prevents crystallization of sucrose with the supersaturated soluti…
  • . WI JOHNABBOTT CEGEP/COLLEGE ENGINEERING TECHNOLOGIES Matter & Heat Problem Set – Ideal Gas 02 Chapters 1, 19 1. A gardener is confronted with the way his sprayer works. The sprayer tank capaci…
  • How many grams of aluminum cyanide , , are present in 2.66 moles of this compound? Âgrams How many moles of aluminum cyanide are present in 1.57 grams of this compound? Âmoles  How many moles of c…
  • Sulfur has four naturally occurring isotopes: 32s with m=31.97 amu 335 with m= 32.97 amu 34s with m= 33.97 amu 365 with m=35.97 amu In a sample containing 10000 sulfur atoms, 2 have exactly 20 neutron…
  • Answer with work and explain please. 1. For the final test run, calculate the percent error of the reaction time to the predicted time of 25 seconds Discuss possible sources of error in the experiment…
  • The electron in a hydrogen atom is excited to the 𝑛=5 shell and emits electromagnetic radiation when returning to lower energy levels. Determine the number of spectral lines that could appear when …
  • . Data and Results Activity 1: Effect of Enzyme Concentration on Catalase Enzyme Reaction Rate Percent (%) If no rxn, use maximum time of 180 25 50 75 100 Depth of H202 (cm) 2.2 2.2 2.2 2.2 2.2 Tria…
  • Estimate the Earth temperature without albedo. using the simplest radiative balance model without atmosphere (Lecture 7. last slide) and setting the albedo to zero (ap=0). Explain why the new tempe…
  • Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level 𝑛=5 to the levelÂ𝑛=1.
  • UsingÂthe lemonade recipe I provided,help me determine the molarity of the sugar in the lemonade mixture. Be sure to provide the step-by-step calculations for molarity by including moles of solute (s…
  • I need help with my chemistry assignment with adding info Â. Alcohol (aka hydroxyl) Place the following information on this slide. Molecular formula, structural formula, what biological molecules (fr…
  • Purpose To learn and apply the use of qualitative and quantitative analysis to determine different substances. Explanation The difference between qualitative and quantitative analysis is importa…
  • Complete the table below for calculating the molar mass of the ionic compound zinc fluoride .   Formula Molar mass of ion  Number of ions  Mass of ion in one mole of zinc fluoride Cation Zn 2+…
  • Using the Graduated Cylinder Data from Part B, calculate the: 1. Mass (g) and density (g/mL) of the first addition of saline 2. Mass and density of the second addition of saline 3. Mass and density of…
  • . Question 1 For each of the following, indicate the number of significant digits of the value. Answer saved If you need to review this concept, select here. Marked out of 2.50 Flag 7.10 3 4 questio…
  • A gas mixture contains 88 grams of oxygen gas, 88 grams of nitrogen gas, and 12 grams of nitrogen dioxide gas. What is the mole fraction of nitrogen dioxide in this mixture? 0.04 O 0.12 O 0.45 O 0.51
  • The following molecular equations each show an ionic compound dissolving in water. Show the ionization process by rewriting each one as an ionic equation: a. CaBr2 (aq) → CaBr2 (aq) b. LiNO3…
  • Aqueous solutions of silver nitrate and potassium bromide react in a precipitation reaction to form insoluble silver bromide, as shown here: AgNO3 (aq) + KBr (aq) → KNO3 (aq) + AgBr (s) a. Rew…
  • These equations represent precipitation reactions. Rewrite them as complete ionic equations. Âa. MgBr2 (aq) + Pb(ClO3)2 (aq) → PbBr2 (s) + Mg(ClO3)2 (aq) b. K3PO4 (aq) + AlCl3 (aq) → 3 KCl …
  • How do you convert between Fahrenheit and Celsius? And vice versa. 255F to degrees Celsius 50.0C to degrees Fahrenheit
  • The steroid contains only C, H and O; combustion analysis of a 14.765 gram sample yields 43.257 g CO2 and 12.395 g H2O. What is the probable formula of the steroid?
  • Lab 6: Titrating Vinegar 3. The molar concentration of hydrochloric acid (HCD) in a solution commercially used to remove boiler scale from plumbing can be determined by titration with NaOH solution. T…
  • Section Date Pre-Laboratory Assignment 1. Briefly describe the possible hazards of working with a 0.5M NaOH solution. 2. Briefly explain the significance of the following terms as they pertain to this…
  • A gas mixture contains 88 grams of oxygen gas, 88 grams of nitrogen gas, and 12 grams of nitrogen dioxide gas. What is the mole fraction of nitrogen dioxide in this mixture? O 0.04 O 0.12 O 0.45 O 0.5…
    • Compare and contrast the terms "mole fraction" and "mass-to-mass ratio" as they apply to the concentration of a solution. Explain what you know about each using your own words.
  • Use the following information to answer the next question Balanced Chemical Equation 2 HgPO4(aq) + 3 Ba(OH)2(aq) – Bag(PO4)2(S) + 6 H20(1) 4. The quantity of Ba(OH)2(aq) in moles required to react com…
  • A sample of pentanol , C 5 H 12 O , contains 1.54 mol of the compound. Determine the amount (in mol) of each element present and the number of atoms of each element present in the sample.
  • . How many grams of ethylene glycol (C2 H O2 ) must be added to 1.25 kg of water to produce a solution that freezes at -3.52 C? Express the mass in grams to three significant digits.. Consider the c…
  • UsingÂthe lemonade recipe I provided, and help me determine the molarity of the sugar in the lemonade mixture. Be sure to provide the step-by-step calculations for molarity by including moles of solu…
  • Write the rate law for the elementary reaction 2O2 (g) + Cl (g) (arrow) ClO (g) + O3 (g)
  • How many moles of Ge are there in a sample that contains 11.4 grams of germanium ? Â 2. How many grams of germanium are there in a sample that contains 2.71 mol of Ge ? Â 1. What is the mass o…
  • The hydrolysis of sucrose has a rate constant of 1.0 ×10-3 M-1s-1 at 37 °C. Calculate the rate constant of this reaction at 55 °C, given that Ea = 108 kJ/mol.
  • Part A A 44.7 g sample of solid CO2 (dry ice) is added to a container at a temperature of 100 K with a volume of 3.2 L. If the container is evacuated (all of the gas removed), sealed, and then allowed…
  • -How many molecules are there in 1 mole? (The definition of one mole of any substance) b) How many molecules are there in 2 moles? -Thinking about what a precipitate is to a solution in chemistry, why…
  • How many moles of Ge are there in a sample that contains 1.59×10 22 germanium atoms?  How many germanium atoms are there in a sample that contains 2.71 mol of Ge ?
  • Info:A transition group metal, M, has a density of 21.45 g/cm3 and a face centered cubic unit cell with an edge length of 392 pm. Reaction of a 0.728 cm3 chunk of the metal with an excess of hydrochlo…
  • solve please. 3. Honey has a high concentration fructose CoH1206 ( sorry no subscripts working in Forms). Fructose has the same molecular formula as glucose, but has a different structural formula. * …
  • Solve please. The chemical reaction that occurs in the food heater raises the temperature of the 100 g of water in the pouch from 23.4’C to 71.7 C. The amount of energy released by the food heater A. …
  • The titration of a weak monoprotic acid was carried out with a strong base using a pH meter and it was found that when exactly half of the acid had been neutralized the pH was 3.7. What is the Ka for …
  • Solve please. The bombardier beetle can release a chemical solution when threatened. Glands in the beetle produce hydrogen peroxide and hydroquinone, CH,(OH)2(aq), which are combined to produce the re…
  • Solve please. The oxidation of ethanol, C,HOH(1), to ethanal, CH,O(1), can be represented by the following overall equation. 2C,H,OH(1) + 0,(g) – 2C,H,O(1) + 2 H20(g) Equations I C,H,OH(1) + 30,(g) -&…
  • Compute and express each answer with the proper number of significant figures, rounding as necessary. Â 56.7 x 66.99 = ? Â My textbook says the answer to this question is: 3.80 x 10^3 How? When all …
  • Solve please. Fermentation of fruits and grains converts glucose to ethanol and carbon dioxide, as represented by the following equation. CH120g(aq) – 2C,HOH(aq) + 200,(g) + 58.4kJ The molar enthalpy …
  • PLEASE DO NOT DO PART A-MENDELEEV’S PERIODIC TABLE  PART A IS ONLY HERE FOR MORE INFORMATION SO YOU CAN UNDERSTAND   Manager:  direct the reader to read Chapter 1 aloud to the rest of the gr…
  • solve please. BaO(5) + CO2(g) BaCO3(s) AH =-274.8 kJ AH(BaO(5)) =-558.1 kJ/mol AH(CO2()) =-393.5 kJ/mol Based upon the reaction, the molar heat of formation for barium carbonate is OA) -548.1 kJ/mol O…
  • Could you please draw Âthe Mechanism Âin details about preparation of 2- methyl cyclohexanol from 1-methyl cyclohexene please?
  • Question #3: (2). 3.) Compare and contrast the terms "mole fraction" and "mass-to-mass ratio" as they apply to the concentration of a solution. Explain what you know about each usi…
  • Question #3:. 3.) Compare and contrast the terms "mole fraction" and "mass-to-mass ratio" as they apply to the concentration of a solution. Explain what you know about each using y…
  • Compare and contrast the terms “mole fraction” and “mass-to-mass ratio” as they apply to the concentration of a solution. Explain what you know about each using your own words. Mrs. Gussman dissolve…
  • (5 points) 4.) It has been raining all day and the temperature is expected to freeze tonight. Mrs. Gussman treats her front steps with sodium chloride (NaCl). This results in a water and salt solution…
  • Why does graphite have a different appearance than a diamond ?. Moving gestion 4 A que se debe que el grafito tenga una apariencia fisica diferente a un diamante? O a. A los enlaces quimicos entre car…
    • It has been raining all day and the temperature is expected to freeze tonight. Mrs. Gussman treats her front steps with sodium chloride (NaCl). This results in a water and salt solution with a fre…
  • What is the empirical formula of each compound ?. Un quimico descompone muestras de un compuesto; se enumeralas masas de sus elementos constituyentes. Calcular la formula empirica de cada compuesto. 1…
  • Data from experiment: Trial 1 1.9 mL of H20, 0.8 mL of 1.0 M HCl, 0.8 mL of 2.724 M of acetone, 0.5 mL of 0.005 M I2 Solution Trial 1 = 225 seconds Trial 2 1.9 mL of H20, 0.8 mL of 1.0 M…
  • CH 4 (g) + 2 O 2(g) → CO 2(g) + 2 H 2 O (l) If 60.8 grams of CH 4 react with excess O 2 , how many grams of H 2 O result?
  • 4 Al (S) + 3O 2(g) → 2Al 2 O 3 (s) When 25.74 g of Al and 69.75 g of O 2 were reacted, 7.88 grams of aluminum oxide were obtained. What is the percent yield? (Hint: You need to determine which one…
  • If 4.89 moles of F 2 are reacted with 17.83 moles of Ti how many moles of TiF 4 will result? Ti + 2F 2 → TiF 4
  • 4 Al (S) + 3O 2(g) → 2Al 2 O 3 (s) How many grams of Al 2 O 3 can be formed from 72.19 g of Al and 27.22 g of O 2 ? (Hint: You need to determine which one is the limiting reactant).
  • . Which compound has a molecular formula that is the same as the empirical formula? O CH10 N202 O CH10 02 O C5H10 O C2HO O C&HBO2 O None of these answers is correct: all answers have an empirica…
  • Submission Details Grades are unavailable because the instructor is working on them. Show Rubric Acetaminophen Synthesis Lab Report Submit Here
  • Hess’s Law Lab  Introduction : The combustion of magnesium is a very rapid and exothermic reaction. It is possible to observe and measure a series of reactions that enable us, with the use of Hess…
  • wo gizxu LE JECT ANDARDS and tio sdispute and web eulouus boilw ritiw asop muntoage rainw ebised celinguine bobivgig ernie are wow betaiposss ei fi quote lenoilonui art bris nous div brod ofliege as o…
  • -4-inture draw the structure on the ure of your liquid sample 4. (1 pt) Give the label "name" for your solid sample (i.e. 1S or 28) and complete the table below using the infrared spectrum y…
  • Chem 237 lab package. ure of 4. (1 PL) G infrared spe group or y 4. Post-Lab Assignment (20 pts.) You MUST turn this paper in to your TA at the start of Next LABI YOUR Name: Abubakar Mi Lab room: 332 …
  • Escoja la formula del compuesto que se forma entre hierro (III) y el ion poliatomico clorito (clorito ferrico). FeCIO2 O FeCIO Fe(CIO2)3 Fe(CIO)3
  • . CC38 — Chemistry — Semester 2 Unit 4 Virtual Lab Acid-Base Chemistry (Titrations) Determination of the pH Scale by the Method of Successive Dilutions INTRODUCTION/OBJECTIVE: this is an intr…
  • a Intime period, beforeto, why is conductivity decreasing? Because the reaction is approaching equilibrium
  • Orange soda is a solution containing water, sugar, flavorings and carbon dioxide gas. Define the terms “solute” and “solvent” in your own words and then identify each ingredient as a solute or solve…
  • org 1. A gas occupies 12.3 liters at a pressure of 0.12 atm. What is the volume when the pressure is increased to 0.88 atm?
  • . Question 4 1 pts Determine the empirical formula of a compound that has the following mass percents: – 3?.fl5fiimn – 20.5% phosphorus – 42.5% oxygen Enter the whole—number subscripts into the …
  • Hello!! :)) I’m having a little bit of difficulty calculating the percent (%) yield of this experiment its a little confusing for me and i dont know where to start can anyone help me on this please? :…
  • please answer the following… (#15 & 16 will be numerical values, not letters from the graphs). The graph below shows reaction. Match the following descriptions with the letters on the graph. Pot…
  • The collision between a hammer and a nail can be considered to be approximately elastic. Calculate the kinetic energy acquired by a 9.7-gg nail when it is struck by a 850-gg hammer moving with an init…
  • 2Cu + S – CuzS Copper (Cu) reacts with sulfur (S) to form copper sulfide as shown in the equation. A scientist adds 12.7 grams of Cu to 3.2 grams of S to start the reaction. In this reaction, all of t…
  • Draw the following molecules: (10 pts) a. 2,4-dimethylbutane b. 3-ethyl-4-methylcyclopentane c. 3,4-dimethylhexane d. Benzene e. 1-butyl-cycloheptane 2. Explain the different types of isomers. Give…
  • com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take What is the significance of the endpoint of a titration between an acid and a base? O the PH is always basic O the PH is alway…
  • Explain chirality and the importance of chirality in medicine. Be sure to give at least one specific example DIFFERENT from that in the lecture. (10 pts) 2. Draw the following molecules: (10 pts) a…
  • CH 4 (g) + 2 O 2(g) → CO 2(g) + 2 H 2 O (l) When 365.0 grams of ÂO 2 were reacted with excess CH 4 , 62.8 grams of CO 2 resulted. What was the percent yield? (Hint: You’ll have to calculate t…
  • Calculate the concentration of each species present in a 0.050- M solution of H 2 S. please answer it in typing, thank you
  • . Explain in detail how you would go about calculating the percent oxygen in magnesium nitrate. Edit View Insert Format Tools Table 12pt v Paragraph v B I g a v i v T2 v Question 2 5 pts An unknown …
  • Most lakes have rivers flowing out of them, carrying water to the ocean. However, some lakes, including Great Salt Lake and the Dead Sea, have no outlet. Water flowing into these lakes leaves only thr…
  • Is this acid base , precipitation or oxidation reduction. Classify the reaction: milky white magnesium hydroxide reacts with hydrochloric acid to form a colorless solution. Mg(OH)2(s) + 2 HCI(aq) – Mg…
  • Calculate the concentration of copper in BOTH the fertilizers: ppm copper weight % copper Show all calculations. Explain in words exactly what you are doing in each step of your math (Math: 5 ma…
  • please answer the following… (#15 & 16 will be numerical values, not letters from the graphs) Â. <spa The graph below shows the energy changes involved in an uncatalyzed and a catalyzed reve…
  • Using information from the pre lab and from your data collection, complete the table below. You must show one calculation for each row or no credit will be awarded for this section. Calculations and G…
  • Are these equations acid-base, oxidation reduction or precipitation.. 1. Classify the reaction: ammonia gas reacts with hydrochloric acid fumes to form a white solid that settles as a fine dust. NH3(g…
  • Mass of (NH4)2Fe(SO¬4) Â3.9366g Molar Mass Â392.13g/mol (Vol KMnO4 used) Endpoint- 24cm³. Calculations Use the known ferrous ion molarity and the measured visual end-point to calculate the permang…
  • Of the following atoms, which would have a half-filled p sub shell?
  • Is this an acid-base reaction, precipitation reaction or oxidation reduction reaction. correct Question 4 0 / 1 pts Classify the reaction: a blue solution of copper(II) sulfate reacts with a colorless…
  • Draw a Beer’s law Calibration Curve based off the data from the experiment. After creating the graph, list what the concentration is and show the concentration calculation.
  • Draw Lewis structure diagrams to depict the following chemical reactions involving ionic bonds.    Â (2 marks each)  lithium + fluorine   →  lithium flouride  aluminum + chlor…
  • . -< Modeling Ionic and Covalent Bonds 1 % ….. In each box, enter the appropriate number of valence electrons for each atom and the number of bonds formed. Submit your choice when you are con?…
  • grade 10 chemisty please help. 2. Balance the following equations. (2 marks each = 16 marks) a) Snoz + 2 H2 – Sn + 2 H20 b) C3H6 + 02 – CO2 + HZO C Fe + 1.5 Clz – FeCl3 d) Ag20 – 2 Ag + .5 02 e) CAHg …
    • The student mixed up their observations. After reading the lab determine which observation fits with which part of the procedure and explain why. A complete explanation of why you chose the observa…
  • I need help with calculating questions 1 to 9 and help with question 4 with the graph.  Â. CHEMICAL KINETICS Introduction The rates at which reactions occur have social and economic implications …
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  • Which atom becomes a cation in the reaction and which atom becomes an anion? Â. Nae . Cl: Nat :Cl: 1$22522p6 3s 1$2252 2p63523p5 1$22522p 1s2252 2p63523p6 octet octet Ne Ar 1$22522p6 1$22$22p63s23p6 …
  • We are working on this lab, I have followed the observational video and need help on some questions. I have included our unknown we are using with all the values.      Â. Cobalt Chloride …
  • Draw a Lewis structure with one nitrogen atom bonded to three oxygen atoms. Does it have a deficit or excess of electrons? What charge does it carry? Explain. (3) 7. Predict whether the bond betwee…
  • Use the reaction below for the following problems. Liquid sulfur reacts with gaseous chlorine to form disulfur dichloride to vulcanize rubber. S 8 (l) + 4 Cl 2 (g) → 4 S 2 Cl 2 (l) Calculate the…
  • Balance the following equations. Provide the answers in the blank. If a value is 1, write “1” in the blank.  ______ N 2 + ______ H 2 → ______ NH 3      ______ P 4 + ______ O 2 → _…
  • com/file/d/1PcOuY86StGWGR-m4btFmCWSWI_FTiirK/view Evidence Table 1 Boiling Points of the Hydrogen Compounds of Elements in Groups 14-17 Boiling point ( C) Hydrogen compound Group 162 14 – 112 -8…
  • According to Marais et al. (2003), what are the advantages and precautions of using Ac-Di-Sol® as disintegrant for furosemide tablets?
  • OBJECTIVES . Explore the effect changing reactant concentration has on reaction rate. . Explore the effect changing the temperature has on reaction rate. . Explore the effect of a catalyst o…
  • Calculate the percent composition of the following. ZnO    P 5 O 10    C 6 H 6      Fe 2 O 3
  • . AutoSave OFF ABC … w Lab 4-MEM1 Report – Spring 2022 – Saved to my Mac Home Insert Draw Design Layout References Mailings Review View ? Tell me Share Comments Times New… v 12 A A Aa Ap AaBbCcD…
  • Antimony is burned in oxygen to form antimony oxide. 4 5b+ 302- 25b203 How many moles of Sb,O, will be formed when you have 20.0 moles of oxygen gas?
  • art B: Short Answers (24 marks) 1. Explain why the atomic radius increases as you move from lithium to francium. (2) . Describe what happens to the radius of an atom as it gains or loses an electron. …
  • Sketches explaining how to determine the bond order of the C-S and C-N bonds in thiocyanate ion. Thank you!
  • Calculate how many grams of a. S are there in 2.20 mol SF6 Â Â Â b. K are there in 1.98 mol K2S Â Â Â c. N in 2.32 mol NH4 Â Â Â d. Ag in 4.5 mol AgCl
  • La Meet – kzb-vvdv-bir x SmarterMarks: SittingStudents X + V X om/SittingStudents/view_open/974693 H The final volume occupied by the gas wil… Use the following information to answer the next questi…
  • MRC – Build a Molecule Discussion Âlet’s apply your knowledge by building molecule. Navigate to this website: https://phet.colorado.edu/sims/html/build-a-molecule/latest/build-a-molecule_en.html Here…
  • KCN 38. Na-O 19. NH,OH 39. Ba(NO;)2 20. NaHCO. 40. Na;PO.
  • Name the following ionic compounds. Example Compound Example Compound Formula Compound Name Formula Compound Name 1. ZnS 21. NazSO3 2. Mgo 22. KH2PO4 3. Ca(OH)2 23. CoS 4 Mn203 24. Cda(PO4)2 5. Ag POA…
  • Can you plese answer these?. Student Pre-lab questions
  • How is the transmittance 12.4?. 5. Transmittance of completed reaction solution 12. 4
  • I already tried, I want to compare answers. I need help here I try to make a situation of my own but found it hard  Â. 1. In the lab, 3.00 k] was applied to a 150 g of an unknown liquid, caus…
  • There is no answer for this one?. For 11 – 15 state the total number of atoms and the number of ions in the compound and silver chromate atoms ions
  • please complete part b. Question 7: Specific Heat and Calorimetry (11 points) Use the table below to answer the questions. Substance Specific Heat (J/g .C) Aluminum 0.90 Magnesium 1.020 Gold 0.129 Wat…
  • In a study of the reaction of compound A and compound B in solution, the following initial reaction rates were measured at 25CÂ. 11:42 AM Thu Feb 24 Home Insert Layout Review View 5) (3O PoinTs) In a…
  • QUESTION 14: Tripling the concentration of a reactant increases the rate of a reaction nine-fold. With this knowledge, answer the following questions: (a) What is the order of the reaction with respec…
  • need help/ explanation. Date: Name: Experiment 5: Freezing Point Depression POST-LABORATORY QUESTIONS 1. A solution is 2.0 m NaCl. What is the freezing point of the solution? Kf= -1.86 2a. A solution …
  • need help/explanation Â. Date: Name: Experiment 5: Freezing Point Depression POST-LABORATORY QUESTIONS (continued) 3. An organic compound contains 74.07% C, 8.64% H and 17.28% N. When 1.921 grams of …
  • need help/explanation. Date: Name: Experiment 5: Freezing Point Depression PRE-LABORATORY QUESTIONS 1 . Pure benzene, CoH6, freezes at 5.45.C. A solution containing 7.24 g of C2Cl4H2 in 115 g of benze…
  • SHOW YOUR WORK During an experiment, the following data is collected: Volume of water in graduated 12.0 cylinder mL 15.4 Volume of water with metal added mL 24.32 Mass of metal g Using the chart of De…
  • Novocaine, C 13 H 21 O 2 N 2 Cl, is the salt of the base procaine and hydrochloric acid. The ionization constant for procaine is 7 ×× 10 −6 . Is a solution of novocaine acidic or basic? What are […
  • The odor of vinegar is due to the presence of acetic acid, CH 3 CO 2 H, a weak acid. List, in order of descending concentration, all of the ionic and molecular species present in a 1- M aqueous soluti…
  • all info in picture. A student designed a calorimetry experiment to find the molar enthalpy of combustion of methanol, CH3OH(1). The student burned 0.0345 mol of methanol to heat 0.100 kg of water in …
  • . 5:15 4 46 , | 60% manitoba.brightspace.com/d21/Ims/quizzir 2 O Equilibrium test Module 4 X Time Limit: 1:30:00 Time Left:1:18:01 DIVINE NWANYIEZE ENWERE: Attempt 1 Question 1 (1 point) A (B) – B (…
  • PROBLEM 60: 60 . An elevated level of the enzyme alkaline phosphatase (ALP) in human serum is an indication of possible liver or bone disorder. The level of serum ALP is so low that it is very difficu…
  • 38 Date Exp. No. Experiment/Subject 5 Course & Name Lab Partner Locker/ Ava Ruf Desk No. Section No. Trial 1 0.004 @ 225 seconds 1.9 mk of H20 D. 8 ML of 1.OM HCI Trial 2 0. 8mL of 2. 724 M of ace…
  • 1-Determine the density of a perfect cube that measures 3.22 cm a side. The mass of the cube is 14.2 grams. 2-A mixture weighing 6.800 grams consists of 32% silicon dioxide, 15% sodium chloride, and…
  • Which of the following are allÂtrue about the upper right hand corner of the periodic table (excluding noble gases)  A. high electronegativity, low ionization energy, low metallic character  B. l…
  • Suppose that in Part 3 of the experiment used you used aqueous NaOH instead of Ba(OH)2. Na2(SO4), sodium sulfate, is a very soluble ionic compound. Write the overall balanced reaction
  • consider the following reaction: Cu2O(s) + H2(g) → 2 Cu(s) + H2O(l) [Balanced] Use the following molar mass data: Cu2O = 143.1 g/mol H2 = 2.016 g/mol Cu = 63.55 g/mol H2O = 18.02 g/molÂ…
  • Using the findings of Paul & Sun (2018), prepare a table that summarizes the decreasing order of these lubricating agents (magnesium stearate, sodium stearyl fumerate and stearic acid) in terms of…
  • Question 3. Vapour pressure, boiling point and Gibbs free energy  (a) The vapour pressure of water is 1.0 atm at 373 K. Estimate the vapour pressure at 383 K. The enthalpy of vaporisation of water i…
  • a specific sri no emutounite ed neo terit elamsa blupil TO e o1 peuble 6. (1 pt.) Below is the IR spectrum of a solid sample that was taken by a student. Give two possible causes for the weak signal…
  • 1 – Dissociation & Molarity Questions Write dissociation equations for the following compounds (make sure to include states!) 1. Potassium chloride 2. Iron (III) sulfate …
  • Will electron configuration help one determine why hydrogen combines with oxygen in a ratio of 2:1 to form a water molecule?
  • Answer questions thoroughlyÂ. 13.22 Draw the structure of a. hydrocarbon with molecular formula 05H”, that also contains: [a] a carbon—carbon triple bond; [b] two carbon—carbon double bonds;…
  • D Question 10 1 pts What kind of artifacts does the background scan remove from the IR spectrum? O IR absorptions due to atmospheric water IR absorptions due to atmospheric carbon dioxide O instrument…
  • D Question 7 1 pts How many peaks in an IR spectrum would you expect to see that would characterize a carboxylic acid functional group? O 1 0 2 0 3 0 4
  • D Question 6 1 pts When assigning a peak in an infrared spectrum, what should you assign it to? O a specific functional group O a molecule O a specific bond and a functional group it is part of
  • Copper is a transition metal. Why the flame emission signal for Cu was absence though the solution was concentrated (the solution is blue in color and clearly visible)?
  • What must you do to the solid sample AFTER they have been placed on the IR spectrometer? O apply pressure to it O blow on it O air it out O apply liquid to it
  • What must you do to a solid sample BEFORE you take the IR spectrum of the solid sample? O dissolve it with water O pack it into a pile O crush it O make it a paste
  • D Question 2 1 pts What is the crystal on the center of the sample plate of the IR made of? O diamond O ruby O emerald O beryl
  • . Follow the pipetting scheme provided by your instructor (see Appendix AOO O B); add the indicated volume of water to the appropriate wells. Once you’ve completed pipetting all volumes, weigh your …
  • IR spectra can be measured by passing IR radiation through a sample or by reflecting IR radiation off a sample. Which of these 2 methods will you use in your lab? O passing IR radiation through a samp…
  • A student mixed 5.0mL of 0.10M of A and 5.0mL of 0.50M of B for a hypothetical reaction: 2A + B – 2C The equilibrium concentration of C is measured to be 0.020M. What is the concentration of A at the …
  • What impact does each variable have on the concentration of a solution? Adding a Adding a Adding Draining Allowing Variable: solid liquid more tap off some water to "pollutant" "polluta…
  • En base a los colores de los espectros de emision observados en los experimentos, complete el siguiente reporte. (10 puntos) De la radiacion Color emitido Elemento predominante Longitud de Frecuenc…
  • A solution of hydrogen peroxide, H2O2, is 30.0% by mass and has a density of 11110g/L solution. Calculate the (a) molality, (b) molarity, and (c) mole fraction.
  • Please answer the attached question and explain your answer.
  • Please answer the attached question and explain your answer. Â. utline V Ruler One Page [ View Side by Side raft IGridlines 10 0 BB Multiple Pages EG Synchronous Scrolling Zoom 100%% New Arrange Spli…
  • A substance has a molar heat of combustion of -810.4 kJ/mol. When 0.685mol of the substance is burned in a calorimeter containing 9.30 kg of water, what is the increase in water temperature?
  • Please answer the attached question and explain your answer. Â. 4. When a hot metal cylinder is dropped into a sample of water, the water molecules speed will and their number of will also increase. …
  • Please answer the attached question and explain your answer. Â. Zoom 100% New Arrange Split EG Synchronous Scrolling Navigation Pane Switch Macros Page Width Window All DO Reset Window Position Windo…
  • . Discuss and evaluate the three methods for cleaning oil spills and identify one method as being the best for the environment. The pipes can be above ground or buried at depths of up to 2 metres. O…
  • . Consider the reaction of SO, and O, described by the chemical reaction below. Determine the equilibrium constant for this reaction. To do this, construct an ICE table (Part 1) and then write th…
  • In this week’s case study , you will investigate magnetism and how it is connected to chemistry. Provide your summary, and later in the week, provide examples of how ferrofluids could possibly improve…
  • Can some one answer to this question please! You Cana sneer in English if you prefer. 1. Le methanol (CH,OH), aussi connu sous le nom d’alcool methylique, est un liquide inflammable aux conditions amb…
  • Please answer the attached question and explain your answer, please. Â. A calorimeter is a container used to measure the heat energy generated by the oxidation of different types of foods by placing …
  • Please answer the attached question and please explain your answer. Â. Macros Problem 1, week 3 These three samples are all placed in three equal sized insulated containers. Based on the data from th…
  • DO NOT GET THE SAME POST. explain the answer for each number so I can understand its concept. You might also add solution (if applicable) and drawing (if applicable). I will give thumbs up for your he…
  • Perhatikan data hasil uji daya hantar listrik terhadap beberapa larutan berikut! Lampu Gelembung pada elektroda Larntan Nyala Mati Banyak Selikit Tidak ada (3) (5) Berdasarkan data tersebut, pasangan …
  • Tahap awal pembuatan asam sitrat dalam industri melibatkan reaksi oksidasi amoniak yang menghasilkan nitrogen monoksida dan uap air menurut reaksi berikut ini : 4 NH,(g) + 5 02 (g) ) 4 NO (g) + 6 H20 …
  • Perhatikan gambar rangkaian sel Volta berikut! Pernyataan yang paling tepat terkait gambar tersebut yang paling tepat adalah
  • Perhatikan data entalpi berikut. AH , CH;OH(1) = – 239 kJ/mol AH : COz(8) = – 394 kJ/mol AH : HIO(8) = – 286 kJ/mol Entalpi pembakaran standar dari reaksi pembakaran metanol menurut reaksi : 2 CH,OH(D…
  • Data percobaan titrasi 25 mL CH;COOH dengan larutan NaOH 0,1 M adalah sebagai berikut. Titrasi ke- 2 3 Volume 24.9 mL 25.0 mL 25,1 mL NaOH Ka CH:COOH = 1 x 10-5 Kurva berikut vang menggambarkan percob…
  • Asam Nitrat diproduksi diantaranya untuk memenuhi kebutuhan industri perbuatan perhiasan. Asam nitrat pekat dicampurkan dengan asam klorida pekat akan menghasilkan aqua regia yang dapat melarutkan ema…
  • 1m 1m CH10 6(ag) NaClag Tf = -1,86 "C Tf= -3.72 "C Jika diketahui Kf air = 1,86 ‘C/m dan Kb air = 0.52 ‘C/m, maka titik didih NaCl 2 m adalah … C.
  • Sebanyak 200 mL larutan HON 0,3 M direaksikan dengan 100 mL larutan KOH 0,3 M (Ka = 5 x 10 "). pH larutan yang terjadi pada keadaan akhir adalah
  • Perhatikan wacana berikut: Seorang siswa A bertanya dalam hatinya, manakah yang lebih efektif berfungsi sebagai hand sanitizer yang tidak merusak kulit tangan saat digunakan, apakah yang berkadar etan…
  • Dear tutor. Please only solve f . I also posted other parts if you are interested to look for them and solving them. I always give Thumbs up to smart tutors who solve in a neat and correct manner. Reg…
  • Consider the chemical reaction: 2 H20(1) 2 H2(g) + 02(g) How many moles of HO are required to form 1.3 L of O2 at 325 K and 0.988 atm?
  • Dear tutor. Please only solve e . I also posted other parts if you are interested to look for them and solving them. I always give Thumbs up to smart tutors who solve in a neat and correct manner. Reg…
  • Good Day Tutors! Please answer the activities and questions provided. Thank you!. Activity 1: You Have to Discover Me! Directions: Find the definition of every word in column A to column B. Write onl…
  • Dear tutor. Please only solve d . I also posted other parts if you are interested to look for them and solving them. I always give Thums up to smart tutors who solve in a neat and correct manner. Rega…
  • . This question has multiple parts. Work all the parts to get the most points. Using a periodic table, but not a table of electronegativity values, arrange each of the following sets of atoms in ord…
  • . afill in the blaan in each item with the characteristics of various bonds between nonmetals. The first item has been completed as an example. Bond Identity: N—P More Electronegative Atom: N At…
  • Question : What can I do with powdered eggshells (Calcium Carbonate)? Â My chemistry teacher asked us to innovate the materials that are given to us. I received powdered eggshell. Dear tutor, please …
  • Given the reactions: A + 2B – 2C (K1 = 2.87) and 2C – D (K2 = 0.160), calculate the equilibrium constant for the reaction D = A + 2B (K).
  • For a particular solution, the activity coefficients for silver and chloride ion are 0.755 and 0.750, respectively. The thermodynamic solubility product (Kspo) for silver chloride is 1.8x 10-10 A. Wri…
  • … Effects of intermolecular forces on the properties of substances. Property of substance Weak Intermolecular Force Strong Intermolecular Force Viscosity low High Boiling point Low High Me…
  • Sight some SPECIFIC instances in a certain field or industry or even in household or day to day basis of the following; 1. Significance in real life of knowing the laboratory equipments 2. significa…
  • equation, and a chemical equation. 13. Balance each of the following: 5. What quantitative information is revealed by a a. H, + C, -.HC chemical equation? b. Al + Re,0 — AlO,+ Fe G. Ph(CH,COO), + HS …
  • . A substance decomposes with a rate constant of 9.05 x 10’4 3". How long does it take for 17.5% of the substance to decompose?. The activation energy for a particular reaction is 102 kJ/mol. I…
  • . [References Using VSEPR theory, predict the molecular geometry of the following molecules. (a) : 1 : N: 1: trigonal pyramidal trigonal planar angular O tetrahedron Submit H: C : H (b ) trigonal py…
  • . The activation energy for a particular reaction is 102 kJ/mol. If the rate constant is 1.35 x 10’4 S"1 at 319 K, what is the rate constant at 273 K?
  • Need help solving, thanks. 1. Determine the ionic strength of: A. A solution containing 0.00100 F KC1, 0.0048 F K3PO4, and 0.0070 F Pb(NO3)2 B. A solution with 20.0 mL of 0.066 F AgNO3 and 10.0 mL of …
  • Directions: Enumerate atleast 5 example of products and services used in each of the different following fields that involves chemistry. AGRICULTURE COSMETICS MEDICINE ELECTRONICS CHEMISTRY MILITARY E…
  • How much bioethanol is needed for one household? 2. How much bioethanol is produced by pineapple waste peelings? Â Â Â Â Â Â Â Â Â Â 3. How much is the production cost of bioethanol for h…
  • The density of aluminum is 2.71 g/mL. What is the volume in mL of 859.4 mg of aluminum?
  • . A reaction was shown to follow second-order kinetics. How much time is required for [A] to change from 0.500 M to 0.205 M? (k = 0.456 M’1 s")
  • . 2 8 pts a ) why did we spend so much time considering stationary states in quantum – mechanical systems? b) why do we use normalized wave functions in our analysis of quantum – mechanical systems …
  • Please answer. DIRECTION: CALCULATE THE FOLLOWING PROBLEM AND SHOW YOUR SOLUTION 1. DETERMINE THE CHANGE IN THE INTERNAL ENERGY FOR THE SYSTEM UNDERGOING AN ENDOTHERMIC PROCESS WHICH 15.6 KJ OF HEAT F…
  • I’ve been struggling for this question for a while. Can you please solve it for me? There has been an answer already but I didn’t show the full calculation…. 3. If a 1.25 g sample zinc oxide, 95% Zn…
  • DIRECTION: CALCULATE THE FOLLOWING PROBLEM AND SHOW YOUR SOLUTION 1. DETERMINE THE CHANGE IN THE INTERNAL ENERGY FOR THE SYSTEM UNDERGOING AN ENDOTHERMIC PROCESS WHICH 15.6 KJ OF HEAT FLOWS AND WHERE …
  • . four moles of NaOH per mole of solution. O four moles of NaOH per liter of solution. Question 10 2 pt Consider the reaction of hydrogen and oxygen to form water as follows: 2 H2 (8) + 02 (8) –&gt…
  • How do I prepare 100 mL of a 100 ppm iron solution from a 1000 ppm stock solution using water? then Prepare a set of five standards in 50 mL volumetric flasks such that the iron concentrations are 0, …
  • my teacher asked us to innovate the materials that are given to us. I received a powdered egg shell. Dear tutor, please help me on what I can do to this powdered egg shell chemically. The idea should …
  • Can someone please solve this for me? There were a solution but they did not answer the question…. 3. If a 1.25 g sample zinc oxide, 95% ZnO, were treated with 50ml of 1.1230N sulfuric acid in the u…
  • . Question 1 In 1903, Arrhenius theorized that a compound could be predicted to behave as an acid or a base by inspecting its chemical Not yet formula. For each of the following sentences, select th…
  • . This question has multiple parts. Work all the parts to get the most points. a Which member of the following pair of compounds would most likely contain covalent bonds? O co O Bao b Which member o…
  • 1)Â Compare Scanning Tunnelling Microscopy and Atomic Force Microscopy. Indicate how they are similar and how they are different in terms of operating principle and the data obtained. Â 2) Describe …
  • . Question 1 Match the terms with the correct definitions. Not yet If you need to review this concept, select here. answered Marked out of 7.50 Flag question Homogeneous mixture of at least one solu…
  • Phosphorus AcidÂ(H 2 PO 4 ) can be prepared from Phosphorus triiodideÂ(PI 3 )Âaccording to the reaction: Balance the equation. If 150 grams of PI3 (MM= 411.7 g/ mol) is added to 250 milliliters of …
  • . Question 1 For each of the following, indicate the number of significant digits of the value. Not yet If you need to review this concept, select here. answered Marked out of 2.50 7.10 Flag ques…
  • Express the quantity in the unit indicated and designate whether this 12 points heat is gained or lost by the substance(12 pts) a. The quantity of heat in calories when 162.5 grams of water undergoes …
  • Good Day Tutors! Please answer the activities. Thank you!. Activity 7. BALANCE ME. Direction: Balance the chemical equation below. Copy the chemical equation and write the proper coefficient on the sp…
  • how to extract phenol, carboxylic acid, amine, and ketone in an ether solvent
  • . Atomic # Name Ist Ionization 2nd Ionization Atomic Energy (kJ/mol) Energy (kJ/mol) Radius (A) Hydrogen 1312 n/a 0.53 2 Helium 2372 5251 0.31 Lithium 520 1.67 Beryllium 900 1757 1.12 Boron 801 2…
  • 1 Add file How much heat is required to convert 40.0 g of ice at -10.0 oC to 100.00 10 points oC? The specific heat of ice is 2.1 J//goC ( 10 pts) t Add file
  • At 6:00 pm, it took you 14.14 seconds to heat an 800.0g pan initially at 15 points zero to 25.0.C on the stove. Then you add 300.0mL of water at 25.0.C on the pan. The stove supplies 628 J/s. Approxim…
  • . A PRELIM SCAM X ‘RELlMS EXAM: ENGlNEERlNG X " Meet – axn-xyol-m 6 C docs google.corn Problem-Solving (2/2) Solvethe following problem and answer what is being asked. Express all answers in …
  • E CHEMICAL REACTIONS Limiting reactants 0/5 Liquid octane CH, (CH2) CH3 )will react with gaseous oxygen (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H, O). Suppose 32. g of octane i…
  • Awww-awu.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3jH-lilaqlit7RBupo61MBsHKG9jpLuS8ccTwijKMp470qDROQgZyh5VmiziNjsO926vwgZDjvgL3p_44Mov_8Wr/ PCVP… O CHEMICAL REACTIONS 0/5 Er Dilution A chemist m…
  • A 50.0 g iron ball (sp ht = 0.473 J/goC) is heated to 35oC and is placed in a 8 points calorimeter holding 100.0 g of water at 350C. What will be the highest temperature reached by water? (8pts) t. Ad…
  • At 6:00 pm, it took you 14.14 seconds to heat an 800.0g pan initially at 15 points zero to 25.0.C on the stove. Then you add 300.Oml of water at 25.0.C on the pan. The stove supplies 628 J/s. Approxim…
  • Solve the following problem and answer what is being asked. Express all answers in four decimal places. A piece of metal was heated and placed in a calorimeter containing ice. Assuming no heat escapes…
  • Glucose, C6H12O6, is used as an energy source by the human body. The overall reaction in the body is described by theÂequation  C6H12O6(aq)+6O2(g)⟶6CO2(g)+6H2O(l) Calculate the number of grams of…
  • How do I prepare 100 mL of a 100 ppm iron solution from a 1000 ppm stock solution using water?
  • I need help with the questions at the end of the paper.Â. Charge a 100-mL round-bottom flask with 9.7 g of salicylic acid and 25 mL of methanol and stir bar. Stir the mixture over a hot plate/stirrer…
  • both questions please and be careful with sig figs thank you. D Question 9 1 pts (Q89) The hydrolysis of sucrose to form fructose and glucose is a first order reaction that has a half life of 2.84 x 1…
  • both questions please and thank you. be mindful of the significant figures thanks. D Question 7 1 pts (Q87) Carbon-14 dating is a first order process used to determine the age of artifacts that were m…
  • both questions please. D Question 5 1 pts (Q85) The tabulated data for a decomposition reaction that occurred at a certain temperature was graphed to yield a linear plot of inverse concentrations as a…
  • Name the following acids: 1. HI 6. HNO2 2. HCI 7. Hclo3 3. H,PO, 8. H, Cro 4. H,PO, 9. H,S 5. HNO 3 10. H,SO 3
    • The conversion of ammonium cyanate into urea is a second order reaction. If the initial concentration of ammonium cyanate is 1.581 M and the concentration is 0.713 M after 23 minutes, what is the …
  • Solve the following problem and answer what is being asked. Express all answers in four decimal places. Â A piece of metal was heated and placed in a calorimeter containing ice. Assuming no heat esca…
  • TITLE: Heat of a Chemical Reaction Number: 107C Post lab 1. (1pt) If you did not ignore the heat absorbed by the calorimeter, but somehow measured it and used it in the the calculation would y…
  • Acetone is used to dissolve and remove nail polish. Why is it a chemical change?
  • . PRELIM EXAM X PRELIMS EXAM: ENGINEERING CI X Meet – axn-xyoz-rcr OX X C docs.google.com/forms/d/e/1FAlpQLSfirHFX7GdwUBv2E2tqM_2gJgfvKQssEdTYc5EkiHgbWPqteA/formResponse upload files and submit this…
  • Use the thermodynamic table below to calculate a predominance diagram showing the solubility of Goethite ( α − F e O O H ( s ) ) as a function of solution pH by plotting the logarithm of the …
  • Please help me with this worksheet correction and those problems thank you. 1) Ethanol has a density of 0.7893 g/ml. What is the volume of 253 g of gas? 2) If you get 25 miles per gallon of gas, how m…
  • . PRELIM EXAM X PRELIMS EXAM: ENGINEERING CI X Meet – axn-xyoz-rcr OX X C docs.google.com/forms/d/e/1FAlpQLSfirHFX7GdwUBv2E2tqM_2gJgfvKQssEdTYc5EkiHgbWPqteA/formResponse Problem-Solving (3/3) Solve …
    • The density of a 34.5 wt% solution of sulfuric acid (H2SO4) in water is 1.1783 g/ml at 25.0 "C. What is the molality, molarity and solute mole fraction of the solution? (5 points) 3a) You have…
  • . PRELIM EXAM X PRELIMS EXAM: ENGINEERING CI X Meet – axn-xyoz-rcr OX X C docs.google.com/forms/d/e/1FAlpQLSfirHFX7GdwUBv2E2tqM_2gJgfvKQssEdTYc5EkiHgbWPqteA/formResponse Solve the following problem …
  • . N0 SIM ‘v? 10:21 PM ‘o’ 71% I < ps 22 mass to mole pa… Q mass to mole part 2 Mass-to-Mole Calculations (Part 2) Name(s) 1. Calculate the number of moles of carbon atoms in 50.0 g C32. 2. …
  • 19) Which of the following would have a boiling point closest to that of 0.5 m AlCls? (Solvent = water) a. pure H20 b. 2 m D-mannose (CH1206) c. I m MgCl d. 0.5 m CH3OH e. 0.1 m NH,NO3. 14) Which of t…
  • Insert coefficients to balance the following equations:(not all products/rescató will have a coefficient). BALANCING EQUATIONS Insert coefficients to balance the following equations: (not all product…
    • What volume of SeOz at 25 "C and 1.50 atm contains the same number of molecules as 2.00 L of Iz measured at 0 "C and 1.00 atm? a. 0.68 L b. 1.22 L C. 1.46 L d. 1.83 L e. 2.18 L. 9) Of the…
  • The maximum contaminant level for arsenic is 0.010 ppm for drinking water per EPA regulation. The arsenic concentration for the drinking water of a municipality was measured to be 4.92 ´ 10 −7 M ar…
  • These can travel only a few inches through air and can be easily stopped with a sheet Alpha particle b. Beta particle c. Gamma ray Y
  • D Question 1 What was the wavelength at the maximum absorbance by [FeSCN2+]?
  • In order to determine your rate law, you assumed that the concentrations of Acetone and HCI do not change over the course of the reaction. Verify that this assumption is valid by using specific num…
  • If your group had access to a temperature-regulated water bath to study the effect of temperature on the iodination of acetone from room temperature to 99 .C, you would find that warmer temperatur…
  • HCI serves as a source of hydronium ions, H30*, through the following reaction: HCl(aq) + H20(l) – H30+(aq) + Cl-(aq) How do you know that the chloride, Cl, ions do not influence the rate of react…
  • Question 5 A student mixed 5.0mL of 0.10M of A and 5.0mL of 0.50M of B for a hypothetical reaction: A + 2B – 3C The equilibrium concentration of C is measured to be 0.030M. What will be the experiment…
  • In order to determine the reaction rate, you also assumed that iodine, 12, did not influence the rate of reaction. What experimental challenges would you face if the [12] did influence the rate of …
  • Thus, the stoichiometry between diprotle t all H* ions from the diprotic tartaric acid sodium hydroxide: Which of following is INCORRECT statement for the chemicals used in this lab? H.CH406(aq) + 2Na…
  • Provide the given, conversion factor, solution and final answer. PROBLEM SET NO. 2 CONCENTRATION OF SOLUTION 1. What weight of magnesium chloride is required to prepare 202 ml of 0.105M solution? 2. I…
  • Round the following numbers to 4 significant figures:  a) 293.475 , b) 0.0063423 , c) 865230 . 2. Indicate the correct number of significant digits (How Many?) in each measurement number given:…
  • Provide the given, conversion factor, solution and final answer. PROBLEM SET NO. 1 CONCENTRATION OF SOLUTION 1. How many grams of calcium hydroxide do you need to measure out to prepare 3.00 L of a 12…
  • No need for explanation, answer only is appreciated Â. Question 21 of 50 Terrestrial planets are planets made up of rocks or metals with a hard surface. Which of the following is the smallest terrest…
  • Describe theÂelectron configuration of an atom usingÂprincipal energy level, sublevels, orbitals, and periodic table. Give one example others may not think about and why you made this selection.
  • i need help with this please. Part II: Provide the structural formulas for the following: 7. 2,5-dimethyl-3-heptyne 8. 6-ethyl-5,8-dimethyl-3-nonyne 9. 2,5,5-trimethyl-3-hexyne 10. 4,5-dimethyl-2-hexy…
  • i need help with this please. Alkynes Review Part I: Name the following hydrocarbons using the IUPAC rules learned in class: 1. HC=CCHCH3 CH 3 2. CH 3 CH;CCH2C=CCHCH3 CH3 3. CH3 CH;CHC=CCH,CHCHCH3 CH3…
  • Question 4.5. (20 %) A simple way to estimate the speed v of a gas molecule is to assume that the average kinetic energy Exin = 1/2 m(v3 + v,] + v.?) = 1/2 my is equal to the average energy that is st…
  • i need help with this please. Part II: Provide the structural formulas for the following: 5. 3,3,4,4-tetramethyl-1-hexyne 6. 4-propyl-2-octene 7. 3-ethyl-2,6-dimethyl-2,5-heptadiene 8. 3-ethyl-2,4,6,7…
  • i need help with this please. Alkanes/Alkenes/Alkynes Review Part I: Name the following hydrocarbons using the IUPAC rules learned in class: 1 . CH2CH3 CH;C = C- CHCH2CH2C=CH CH2CH3 CH3 2 . CH3CH2C=C=…
  • both please and thank you. double check sig figs.. Question 1 1 pts (Q81) Hydrogen peroxide decomposes to water and oxygen gas is a first order reaction: 2 H202 ( aq) – -> 2 H20 (1) + 02 (8) If the…
  • Use the fundamental identities to fully simplify the expression. sin( x ) cos( x ) sec( x ) sin(− x ) cos(− x ) csc(− x ) sec( x ) + sin( x ) tan(− x )
    • What is specific density? b) What is the unit for specific density?
  • The first two images have the same data, so only one calculation is needed.. IV. 2. CALCULATING K, AND KB Use the values above for the following calculations: Kb Ka Trial # Unrounded Rounded Unrounded…
  • What are the solutions for the blank boxes and the formulas?. Data : Table 1 . Raw Measure and processed pata for Balance Table 1. Raw, and Processed Data for enlance Precision 20-ml Graduated cylinde…
  • Consider the following chemical reaction. 4 Al (s) + 3 O2(g) → 2 Al2O3(s) [balanced] If 4.20 g of aluminum are reacted with 4.00 g of oxygen gas, which of the reactants is the limiting reactant? Use…
  • . For each of the following valence electron configurations of a homonuclear diatomic species, state the element symbol that corresponds to letters X, Q, and Z, and determine whether the molecule…
  • . (a) X2: (0925)2(@* 42s)2(mu2p)# element symbol = bond order = (b) Q2: (0925)2(0*425)2(092p)?(nu2p)4(n*g2p)3 element symbol = bond order = (c) Z2: (0925)2(0# #25)2(mu2p)1 element symbol = bond orde…
  • . For each of the following valence electron configurations of a homonuclear diatomic molecule or molecular ion, identify the element X, Q, or Z and determine the total bond order, element X = bond …
  • To neutralize 500 mL 2 M Mg(OH) 2 , how many liters of 1 N H 2 SO 4 are needed?
  • Ozone decomposes to form oxygen molecules and oxygen atoms, O 3 ( g ) → O 2 ( g ) + O( g ), in the upper atmosphere. The energy of activation for this reaction is 93.1 kJ/mol. At 600 K, the rate con…
    • Preparation and UV-vis Analysis of Standard Solutions of Curcumin in 20% Sodium Phosphate Buffer, pH 7.0/80% EthanolÂ(Figure one is the standard Solution)   B. Preparation and UV-vis Analysi…
  • Based on the video demonstration, which representation is correct? Support your response with observations from the demonstration. The correct representation is: Justification:
    • silver chloride in 0.20 M NaCl(aq); (b) mercury(I) chloride in 0.150 M NaCl(aq); (c) lead(II) chloride in 0.025 M CaCl2(aq); (d) iron(II) hydroxide in 2.5 x 10-3 M FeCl2(aq). (e) silver iodide in …
  • Brochure Making Direction: Create a brochure featuring the unusual properties of water, its significance to life, and how these properties may be explained by its structure and intermolecular f. Learn…
    • 0 mL of 0.400M Al(NO3)3 solution is added to 150.0mL of 0.150M K2CO3 solution, resulting in formation of solid Alz(CO3)3.
  • Your team will analyze Chem-Med Company. 2. Your team will play the role of a financial advisor; and will write a comprehensive report to your client whether or not to invest in Chem-Med Company. 3…
  • In the reaction of aluminum with dilute sulphuric acid, aluminum sulfate and hydrogen gas are produced. What mass of hydrogen will be formed if 2.0 moles of aluminum are used?
  • I have a solution with an analytical calcium concentration of 0.001 m, an analytical magnesium concentration of 0.0005 m and an analytical selenate (Se042-) concentration of 0.004 m. Ignore other s…
  • pls help. edit was yesterday at 7:27 PM 18 + B I U A / GO P O . BEEX E. E. EEX 1 14 15.171 16 . 1 1 1 ADD WATER SHAKE TO ADD SELECT COMPOUND HERE SOLUTE HERE Solute: Drink mix Drink mix Solid Solution…
    • Write and balance the equation for the following reaction: Aqueous solutions of chromium (II) nitrate and ammonium phosphate are mixed, resulting in the precipitate formation of chromium (II) phosp…
  • . This question has multiple parts. Work all the parts to get the most points. a Write simple valence bond wave functions for formation of bonds between C and H atoms. C H y bond = Cil (1)2p= (2)] +…
  • The real density of pyrite is about 5 g/mL, malachite is 3.8 g/mL, and amethyst is 2.7 g/mL. Our values are quite close but not exact. Explain what errors could have occurred in our experiment to make…
  • What is the most important intermolecular force present in the following? a) sucrose b) glucose c) triacylglyceroles 17. What is the strongest possible intermolecular force between triacylglycerol…
  • Please help me with my task in our subject, general chemistry II. The task is to compose a poem or a song (indicate the tune), showing or applying the concepts about kinetic molecular theory or interm…
  • What is the Kelvin temperature reading of a – 39 OF ? Please round your answer to the nearest whole number (integer). Equation: TK = (TF-32) 1.8 + 273 Question 13 1 pts A 61 g aluminum rod is heated f…
  • which do you think would boil at a relatively higher temperature condition, a hard water like the sea-water sample or a soft water like the distilled water sample? why?
    • 0 mL of 0.400M Al(NO3)3 solution is added to 150.0mL of 0.150M K2CO3 solution, resulting in formation of solid Alz(CO3)3. a) Write the balanced equation for the reaction. (I gave you the formul…
  • How much heat is needed to completely melt a 88-gram chuck of ice at 0 C? Please round your answer to the nearest whole number (integer). Equation: Q – m Lf . For ice, Lf = 80 cal/g. D Question 15 1 p…
  • . Activity 5 1. Find the percentage composition of each of the following. a. Phosphoric Acid b. Aluminum Chloride 2. Analysis of a sample of a pure compound reveals that it contains 50.1% of sulfur …
  • Other two questions: 1. If you want to solve for the volume of a gas (V2) and P1 is greater than P2, would you expect the resulting V2 to be larger or smaller than V1? 2. What would be the equation fo…
  • Based on your knowledge of factors that influence the evaporation rate, determine the order from fastest to slowest evaporation for the following 3 volatile solvents:Â acetone (CH 3 COCH 3 ), ethanol…
  • Based on question 2 provide a discussion paragraph what can be concluded about the calibration of this experiment . Use mathematical evidence to justify. Explain each question in detail and explain ea…
  • . Consider the reaction: Mg(OH)2 (s) x——’ Mg2+ (aq) + 2 OH’ (aq) At equilibrium, a 1.0 L reaction vessel contains 5.3 moles of Mg(OH)2 and concentrations of 0.0080 M and 0.010 M…
  • Write correct name of each compounds that contain poly atomic ions. NaClO H2O2 Ca(NO3)2 FeCO3 ZrNO2 Ag2Cr2O7 KMnO4 Au2SO4 Ca3(PO4)2 Co2(CO3)3
  • Calculate the mass of solute in 1 L CaCl2 solution if the boiling point of the solution is 103 °C at 1 atm. Molecular weight of CaCl2 = 111 g, Kb = 0.51 °C, density of water = 1 g/mL.
    • Rank the following titrations in order of increasing ph at the equivalence point of the titration (1 = lowest pH and 5 = highest PH). 1 v 100.0 ml of 0.100 M KOH by 0.100 M HCI 2v 100.0 mL of 0.100…
  • See your list of polyatomic ions to assist you in solving the problems. Practice – Write the formula for each of these polyatomic compounds. Make sure the formula is balanced -there must be no net cha…
  • Good Day Tutors! Please answer the activities provided. Thank you!. Activity 3. May the force be with you! Let’s try to identify the different kinds of intermolecular forces present in some molecules….
  • A gas has an initial pressure of 2065mmHg and a temperature of 416K. what is the new pressure, in atm, if the temperature is cooled to 382k.Âthe volume and number of molecules remain constant? 3sf
  • A container of gas is initially at 0.500atm and 25degrees C. what will the pressure, in atm, be at 125degrees C? 3sf
  • If I have 2.9 L of gas at a pressure of 5.0 atm and as temperature of 50.0degrees C, what will be the temperature , in degrees Celsius, of the gas if I decrease the volume of the gas to 2.4L and decre…
  • 0L of a gas is at STP.ÂWhat is the new pressure in kPa if the volume changes to 10.5L and the temperature and number of molecules remain constant? 3sf
  • Fluorine gas exerts a pressure of 900torr. When the pressure is changed to 1.50atm, its volume is 250ml. What was the original volume in mL? 3sf
  • Use the molar mass of calcium phosphate , 310.2 g/mol, to calculate the moles of calcium phosphate present in a 167 -g sample of the compound.
  • A child has a toy balloon with a volume of 1.80L. The temperature of the balloon when it was filled was 20 degrees C and the pressure was 1.00atm. If the child were to let go of the balloon and it…
  • need help figuring out dilutions. A 4.3 M solution of HCI has 4 equal volumes of pure water added to it. What is the new concentration of the HCI solution in M?
  • . QUESTION 1 Using the balanced equation and the masses of citric acid and sodium bicarbonate given in the background information, determine the theoretical yield of carbon dioxide (in grams). Which…
  • . Steps reduces on ley.com/waw/ul/w//assessment-player/index.htmlhlaunchld-575314od-1775-#658-aTae-40cocecb568h=/questionv2 Question 3 of 5 – 13 View Policies Current Attempt in Progress The develop…
  • CER BUFFERS Â Â Learning Objectives 16.3 ÂBuffer Solutions Define a buffer. Predict the relative pH change for a given buffer system after addition of strong acid or strong base. Â Instructions:Â…
  • Write a balanced equation for what happens when gaseous NH3 is dissolved in water Express your answer as a chemical equation. Identify all of the phases in your answer AEd Y A chemical reaction does n…
  • In Part III of the procedure, explain the reason behind the color changes (if any) upon a complex ion formation.
    • Gay-Lussac’s Law 1. Write the equation for Gay-Lussac’s Law: 2. Explain Gay-Lussac’s Law in terms of the kinetic-molecular theory: 3. What would a graph of pressure vs. temperature look like? 4. Ho…
  • Assuming you have 1.20 moles of KOH, how many grams would this be?  Question 2 options:  56.1 g   67.3 g   0.0214 g   46.8 g   Question 3Â(1 point)   What is the molecular w…
  • Molarity of oxalic acid in sample Average molarity of diluted oxalic acid solution Molarity of saturated oxalic acid solution SAMPLE CALCULATIONS:
  • Simple ionic compounds. Write the chemical formula. Show criss cross math. Then write compound name Reaction of lithium and phosphorus Reaction of sodium and carbon Reaction of Aluminum and Sulfur Rea…
  • . Question 3 1 pts 1. The specific heat of a metal is determined by heating the weighed metal, adding it to water in a calorimeter, and measuring the temperature change. The specific heat of water i…
  • . ps 21 mass to mole Pa… 11 5. How many grams are in 3.69 mol of diatomic oxygen (O2)? 6. How many grams are in 7.89 x 1024 bromine atoms? 7. Determine the molar mass of the following substances: …
  • 1 Compressibility 1. Why is there no change in volume when pressure is applied to liquids and solids? 2. Why do gasses compress more easily than liquids and solids? 3. List three uses for compresse…
  • The rest (please use unit factor Using the following reaction: 2 KCIO3 > 2 KCI + 302 and the molar masses: KCIOs: 122.55g/mol; O: 32.00 g/mol; KC1:74.551 g/mol; 1) How many moles of O, will be prod…
  • Which ion is responsible for making a solution acidic? Which is responsible for making it basic? If a solution is basic, does that mean that there are none of the other ions present? Explain.
  • . 1. How many moles are in 9.85 g of aluminum? 2. How many moles are in 5.46 1b of zinc? Note: 1 1b. = 453.59 g. 3. How many atoms are in 1.23 x 10" mol of iron? 4. How many atoms are in 5.55 o…
  • The equation E = mc2 is one of the lasting symbols of science and nuclear chemistry in general. i. Explain what each term in this equation means and what energy is being calculated. What are the deriv…
  • Electrochemistry is important in many aspects of daily life. i. Define voltaic cells. ii. Fill in the blanks for the drawing of a voltaic cell that’s made with copper/copper (II) nitrate (E° = 0.34 V…
  • The density of water at 4.00°C is 0.967 g/mL. How many molecules of water are present in a 499.8 mL bottle of water? Express your answer to the correct number of significant figures. Be sure to show …
  • Given the following data, determine the orders with respect to the concentrations of substances A and B in the reaction. Explain your reasoning (image is attached for data) 2. What must be the unit…
  • Direction: Create your own brochure featuring the unusual properties of water, its significance to life, and how these properties may be explained by its structure and intermolecular forces.. Learning…
  • A sample of gallium contains 2.31×10 25  Ga atoms. What amount of Ga , in moles, does this represent?  I’m unsure how to go about solving this.
  • Please help me in this watch the video attached and answer the following What is the video is all about? How it will benefit or help us? What is the learning than you take after watching the video thr…
  • Table 4: Effect of nature of reactants on reaction rate (2) Reactant Reaction Time (s) Reaction Rate (s-1) Fe2+ + Mn04- + H+ C2042-+ Mn04= + H+ 6:12: 07 Table 5: Effect of catalyst on reaction rate (2…
  • need help figuring out solubilityÂ. You will need to consult a solubility table. A solution of AgNO3 has a certain concentration. Which of the below solutions, if added to the AgNO solution would red…
  • PART IV. CALCULATING K. OF ACETIC ACID FROM THE EQUIVALENCE POINT OF THE TITRATION Using the combined information from the titration curve and the first and second divided difference curves, please co…
  • . Match the following oxidation numbers for nitrogen to the correct compound or ion given: V N|3 1 -3 v NO v NH: 3. +2 : v I No; 4. +3 5. +5 v NO
  • There are many important applications of electrochemical processes, like rechargeable batteries, fuel cells, the coating of objects, and breathalyzers. There are even applications in medicine. Need he…
  • . Predict the valence electron configuration and the total bond order for the molecule Csz , which exists in the gas phase at high temperature. (If a fraction is needed for the bond order, enter a d…
  • . Photoelectron spectra were acquired from a sample of gaseous Oz using He(I) radiation, which has wavelength 58.43 nm and energy 21.22 ev . The spectrum contained a peak for photoelectrons with spe…
  • Preparation and UV-vis Analysis of Standard Solutions of Curcumin in 20% Sodium Phosphate Buffer, pH 7.0/80% Ethanol   B. Preparation and UV-vis Analysis of Commercial Curcumin in 20% Sodium P…
  • PART III. CALCULATING K, OF ACETIC ACID FROM THE MIDPOINT OF THE TITRATION Using the combined representations of the titration curve and the first and second divided difference curves, please complete…
  • how do you find rate for the table provided in the first of the lab?
  • . Select the simple valence bond wave function (i.e., no orbital hybridization or electron promotion) for the formation of bonds between B atoms and H atoms along the z-axis. O w bone(1,2) = C1 [2p2…
  • Calculate the molecular weight of a 10 pound bowling ball polymer please explain,no copy paste and give complete answer
  • . This question has multiple parts. Work all the parts to get the most points. For each of the following valence electron configurations of a homonuclear diatomic molecule or molecular ion, identify…
  • PLEASE WATCH THIS VIDEO https://youtu.be/G8LHGY3i01Q and answer the following questions. Before watching the video what do you know about food Irridiation and Safety? After Watching it What have you l…
  • Epinephrine HO-CH-CH,-NH-CH, 0- HC Il HC CH OH OH molecular mass of epinephrine: & TOOLS x10″ A amu
  • Calculate the molecular weight of a 10 pound bowling ball polymer? please explain and give correct answer no copy paste
  • An unknown substance was found to be highly soluble in water and the resulting solution was found to not conduct electricity. When 416 grams of the unknown substance was added to sufficient water to…
  • Compare the difference between Thompson’s model of the atom from Rutherford’s model of the atom
  • Reaction rates depend on many different factors including surface area. When surface area increases so does the reaction rate. Explain why/how that changes the reaction rate. What is going on at…
  • need help figuring out solubilityÂ. Consult a solubility chart to answer the following question. In the reaction of NaBr (aq) + AgNO3 (aq), a solid is produced. O True O False
  • Can someone show me a step-by-step calculation for the first part Trial 1? I can do the calculations for Ave Ka of acetic acid, STD, and 90% confidence limit.. PART II. CALCULATING Ka OF ACETIC ACID F…
  • . such different melting points. whereas ICI (name is iodochloride) melts at 27.20C. Explain why these two substances have The compounds Br2 and ICI have the same number of electrons, yet Br2 melts …
  • Calculate the molecular mass of the compounds represented by the chemical structures. Round to the hundredths place. Line represent bonds between adjacent atoms.
  • 8. lon Predictions with MO Diagrams How many unpaired electrons would be present on a Oz* ion? Would it be paramagnetic or diamagnetic?
  • . whereas ICI (name is iodochloride) melts at 27.2 C. Explain why these two substances have such different melting points. 23. The hydrogen compounds of the group 4 elements are CH4 (-162.C), SiH4 (…
  • Need illustrations and explanations in two paragraph Â. 8. The density of nickel is 8.908 g/cm3. If the metallic radius of nickel is 125 pm, what is the structure of metallic nickel? 9. An element ha…
  • What is the hybridization of the S atom in SO3? The sulfur atom is surrounded by three bonds and one lone pair of electrons. Therefore, the electron pair geometry is tetrahedron, and the hybridizat…
  • Use both elementary and global kinetics to compare the concentration vs. time curves for methane, methanol, ethane and ethanol at 1800 K, 1 atm and ER=1.0. (b) Do the same as in (a) for H 2 and propan…
  • Urea, NH2C(O)NH2, is sometimes used as a source of nitrogen in fertilizers. What is the hybridization of the nitrogen atom in urea?
  • . Test 6 Review Problems Provide the names of the following substances. 11. AgaS 12. CO 13. CazC 14. H3PO4 15. PdS2 16. Ba(NO3)2 17. N208 18. NH4CI 19. NH3 20. Fe2(CO3)3
  • Provide the formulas for the following substances.
  • 2012 (SAQ) 1. Identify the number of o and it bonds contained in the molecule below. Single bond Triple bond H H H- : 0: C Double bond H CI : Lone pair H 2. What are the partial charges of an HBr mole…
  • abrillo College Calculate the molecular formulas of these compounds. Are the two compounds isomers? A. B Index || Exercise 1 2 3 4 5 6 7 8 9
  • Give IUPAC names and draw the structural formula for the compounds. C.
  • need help figuring out solubilityÂ. Consult a solubility chart to answer the following question. In the reaction of NazSO4 (aq) + Ca(NO3)2 (aq), a solid is produced. O True O False
  • Calculate the following: 1. Molar mass of Al2(SO4)3 2. Molar mass of C2H6O 3. The number of moles in 0.476 g of Br2 4. The number of moles in 16.7 g of water 5. The mass in grams of 2.50 mol CuO 6. Th…
  • Give IUPAC name and draw the structural formula for each compounds. B
  • How many atoms of aluminum (Al) are contained in 3.73 moles of aluminum?
  • Discussion Board Prompt: Can you use molecular orbital theory to explain why fluorine is such a highly reactive gas?
  • Lab #7 Determining Molar Volume (L / mol) of Hydrogen Gas Purpose – clearly stated Data Table complete the following table Observations Trial #1 Trial #2 Mass of Magnesium Ribbon (g) Temperature of Wa…
  • the provided structures. Decide which spectrum goes with which structure, draw the structure ctrum and clearly indicate the peaks in your spectra with frequencies greater than 1500 cm- that can be ssi…
  • (1 pt.) Below is the IR spectrum of a solid sample that was taken by a student. Give two possible causes for the weak signals observed. nail an 100 mulloage bait uevil ewoy et li li nmuloo sow 80 e…
  • . Predict the valence electron configuration and the total bond order for the molecule Cs2 , which exists in the gas phase at high temperature. (If a fraction is needed for the bond order, enter a d…
  • a b and c please. For each of the following valence electron configurations of a homonuclear diatomic molecule or molecular ion, identify the element X, Q, or Z and determine the total bond order. ele…
  • ure of your liquid sample auso eldiazoq owt evie Insbula e vo nelat eww forit algmiss bilos s to muvoege All erit i woled (ig f) . 4. (1 pt.) Give the label "name" for your solid sample (i.e…
  • Post-Lab Assignment (20 pts.) You MUST turn this paper in to your TA at the start of Next LAB! YOUR Name: Lab room: Partner Name: Lab time: allaish yo1 song cavna3 062 TA Name: "If you did not…
  • Consider the following reaction between calcium oxide and carbon dioxide: CaO(s)+CO2(g)→CaCO3(s) A chemist allows 14.4 g of CaO and 13.8 g of CO2 to react. When the reaction is finished, the che…
  • 2 Chem 180L properties Experiment # 02/ 17/22 09 Amanda Austin Experimo Roxygen Pate Name NM Lab Partner n. . L Discussion Questions: 1) Write the reaction for the generation of oxygen in the experime…
  • need help figuring out solubilityÂ. Consult a solubility chart to answer the following question. In the reaction of NazSO4 (aq) + Pb(NO3)2 (aq), a solid is produced. O True O False
  • (3 points) If 1.99 g of CO2 are soluble in 1.00 L of water at a partial pressure of 1.00 atm at 25 "C, and the pressure is changed to 2.5 atm (about the pressure of a can of soda), what will t…
  • Reading List Chapter 7: Changes of State and The Gas Laws In this chapter we will learn about: . Changes of State o Kinetic Energy vs Intermolecular forces o Energy transfer during state change o Spec…
  • . Predict the valence electron configuration and the total bond order for the molecule $2 , which forms in the gas phase when sulfur is heated to a high temperature. (If a fraction is needed for the…
  • I just need the calculations.. word from the experiment printout. Pre-Lab Questions (show your work for credit) 1. Calculate the volume of 0.25M barium chloride you will need to fully react with a 0.6…
  • How have ideas about the grief process changed in recent years? The Dual Process Model identifies two areas of focus that come up for the bereaved person. Describe them and explain how they might alte…
  • How many moles of lead (Pb) are equivalent to 1.35 × 10 12 atoms of lead?
  • In the space below or in your notes, draw a line that you think best represents your total life span . The line will be a straight one with a beginning and an end, of any length. Consider this line to…
  • can u please show me how to do this step by step? thanks!
  • can u please show me how to do this step by step? thanks!. What mass of ammonium chloride must be added to 250. mL of w with pH = 4.85? [K.(NH;) = 1.8 x 10"-] A) 4.7g B) 75g C) 2.3 *10 ‘g D) 19g …
  • need help figuring out SolubilityÂ. Consult a solubility chart to answer the following question. In the reaction of NazCO3 (aq) + KNO3 (aq), a solid is produced. O True O False
  • stion 3 01 15 Each pictured Lewis structure is invalid. Identify the error in each case.
  • can u please show me how to do this step by step? thanks!. Morphine, CoHiNO:, is often used to control severe post-operative of the solution made by dissolving 25.0 mg of morphine in 100. m morphine K…
  • What do elements in the same group have in common? (1 mark)
  • can u please show me how to do this step by step? thanks
  • Respiration is a three-step process that breaks down glucose and produces ATP. Describe each of the three steps.
  • Complete the following table (6 marks) Atom/ lon Bohr- Rutherford Diagram (2 marks each) Lewis Dot Diagram (1 mark each) Nitrogen Atom Beryllium lon
  • Guven the following data, determine the orders with respect to the concentrations of substances A and B in the reaction. Explain your reasoning (image is attacted for data) 2. What must be the unit…
  • Compare the heats of nitride interface reaction for In, Al, and Cr (-117.2 kJ/mol) on GaN. Which metal reacts the strongest? Which metal reacts the weakest?
  • . 1. Explain how the intensive properties of a material are reflected in the unit cell. Are all the properties of a bulk material the same as those of its unit cell? Explain your answer.
  • rate law for trial 1=0.380 rate law for trial 2=0.306 rate law for trial 3=0.170 rate law for trial 4=0.180 what is the overall order for each reactant?. Trial [Bra] with (M) [acetone] itbel (M) [H’] …
  • Using the Ideal Gas Law, PV = nRT, where R = 0.0821 L atm/mol K, calculate the volume in liters of oxygen produced by the catalytic decomposition of 25.5 g potassium chlorate according to the followin…
  • I need help with the answers to this lab report  These are the questions: Q1 In part I of the experiment, what is a source of error that could account for the difference between your calculated …
  • I was given that he density of isopropyl is 0.756g/mol; and I also believe the R=8.3145J/mol, and R=0.08206 L•atm/mol•k apply to this problem but I may be wrong.. Name: 5. (3 points) Consider a so…
  • The mole is a counting number that allows scientists to describe how individual molecules and atoms react. If one mole of atoms or molecules is equal to 6.022 × 1023 atoms or molecules, how many mole…
    • Does any one magnesium atom have this mass? Explain.
  • Work with your team and use the method of equation (2) in Model 2 to calculate the average mass of a magnesium atom in amu.
  • Combustion reactions are a notable source of carbon dioxide in the environment. Using the following balanced equation, how many grams of carbon dioxide are formed when 100.00 g of propane (C3H8) is bu…
  • . M3LE2 Hand-In Assignment: Reaction Rate In this assignment, you will use a tab activity results to measure the average and instantaneous rates of reactions. Marks may be awarded as outlined. If yo…
  • Simple Ionic Compounds. Balancing Compounds. Write formula and name result. Crisscross, math. What does each of these yield – Chemical formula and Compound name. Show charged of ions before combining….
  • . A system can reach an equilibrium position starting from either the forward reaction or the reverse reaction. Discuss how the equilibrium position of the system is affected by starting from the fo…
  • Electrolytes Determination In a table form, Differentiate the classification of hyponatremia by osmolality and explain the mechanism? Enumerate at least 5 diseases that can cause hypernatremia (acco…
  • Consider a solution that is 91% (by mass) isopropanol (rubbing alcohol, 60.1 g/mol) and 9% glycerol (92.1 g/mol). What is the vapor pressure of the solution at 10 °C if the vapor pressure of pure iso…
  • . 1. What are the possible values for the quantum numbers n, l, and ml in the first three shells? 2. How can you apply your knowledge of electronegativity in case of deciding bond polarity of molec…
  • Which reaction is not an example of a redox reaction? A) 2 Hg(l) + O2(g) → 2 HgO(s) B) 2 (NH4)3PO4(aq) + 3 Ba(NO3)2(aq) → Ba3(PO4)2(s) + 6 NH4NO3(aq) C) CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g) D) 6…
  • Which reaction is an example of an acid-base reaction? A) H2CO3(aq) → H2O(l) + CO2(g) B) H2SO4(aq) + Ca(OH)2(aq) → CaSO4(aq) + 2 H2O(l) C) 6 HCl(aq) + 2 Al(s) → 2 AlCl3(aq) + 3 H2(g) D) FeCl3(aq…
  • When the reaction shown is correctly balanced, the coefficients are: ________ HBr + ________ Ca(OH)2 → ________ CaBr2 + ________ H2O
  • Need help with chemical reactions. 1) Chemical formula and 2) name using criss cross solving Lithium and Nitrogen Cesium and Bromine Potassium and Sulfur
  • Chapter 2 focuses on physical and chemical changes and physical and chemical properties of matter. In this experiment you will investigate some physical and chemical changes using household chemical…
  • When the reaction shown is correctly balanced, the coefficients are: ________ C6H14(l) + ________ O2(g) → ________ CO2(g) + ________ H2O(g) Group of answer choices 1; 6; 6; 7 2; 19; 12; 14 2; 16.5; …
  • . MOLE2 Hand-In Assignment – History of the Voltaic Cell In this assignment, you will investigate the contributions of other scientists to our knowledge of electrochemical cells. Unless you are inst…
  • Please help with math or criss cross chemical formula.. crisscross method from your notes), compound name for each. Using the crisscross method or math to solve. (1) write the formulas for the ionic c…
  • Please assist in completing this chart.. ELEMENT # Valence Electrons attelections gain itelections lose / lon formed NONE 1 1 Lit1 / cation 3 NONE N- 3/anion CI ma
  • The net ionic equation for the reaction between zinc and hydrochloric acid solution is A) Zn(s) + 2 H+(aq) → Zn2+(aq) + H2(g). B) Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g). C) Zn2+(aq) + H2(g) → ZnS…
  • Given that Vitamin B-12 contains 1000 mcg Cobalt in 30mL of the sample. Calculate the mass of Vitamin B-12. The molar masses of Co (58.93g/mole) and Vitamin B-12 (1355.2g/mol).
  • . Activity 8: Knowledge Check on Molality! Direction: Solve the given problem. You may use a separate sheet of paper. How many grams of solute is present in 0.4 moles Magnesium hydroxide, Mg(OH)2 in…
  • You find a mystery compound in the lab, coarse colorless crystals, because your partner did not label its vial! You know it’s soluble in water, and you think it might be either lithium chloride, LiCl …
  • Given the balanced equation 4NH 3 ( g ) + 5O 2 ( g ) → 4NO( g ) + 6H 2 O( g ), if 32.5 g of NH 3 react with sufficient oxygen, how many grams of H 2 O should form?
  • please explain give complete answer. 5. Which of these dienophiles gives the FASTEST reaction with cyclopentadiene? (Draw the corresponding reaction) O O O’ A B C O Reaction Explain
  • 1 . Research and create a PowerPoint about polymers. Your PowerPoint should include the following; Formation of and types of polymerization reaction (4 marks) Examples of natural and synthetic polymer…
  • What can you claim about how polymer properties are affected by the molecular structure of the polymer? Compare polymers based on chemical composition, cross-linking, and other structural features.
  • Round to significant figures. moles to grams conversion R6B Score: 1/3 1/3 answered O Question 3 < Balance the reaction shown below: CaBr2 + Ag2SO4 – CaSO4 + AgBr Once balanced, given 0.811 moles C…
  • Round to significant figures. moles to grams conversion R6B Score: 1/3 2/3 answered Question 1 Balance the reaction shown below: CAH10 + 02 – CO2 + HO Once balanced, given 0.742 moles C4/10, calculate…
  • Which observation provides information about the chemical properties of a substance? a. The substance is a liquid at 25oC. b. The substance has a density of 2.50 g/cm3 . c. The substance burns brig…
  • We speculate that Fahrenheit set the 0 point of his temperature, the freezing point of brine solution. If 0 F is -17.8 Celsius estimate what the mass of NaCI he added to the 1L of water to achieve thi…
  • Round to significant figures. moles to grams conversion R6B Score: 1/3 1/3 answered Question 2 < Balance the reaction shown below: HaPO+ NaOH – NagPOA + HO Once balanced, given 0.416 moles H3 PO4, …
  • To obtain pure lead, lead (II) sulfide is burned in an atmosphere of pure oxygen. The products of the reaction are lead and sulfur trioxide (SO3). Write a balanced chemical equation for this process. …
  • Compare the heats of nitride interface reaction for In, Al, and Cr (−117 . 2 kJ mol−1) on GaN.
  • . 4. Arrange the three types of cubic unit cells in order of increasing packing efficiency. What is the difference in packing efficiency between the hep structure and the ccp structure? Fcc, bec, si…
  • How to find percent yield. Percent yield (% ) of aspirin
  • Question 4 9 pts Br HO ??? B OH HC OH B C D A Look at the given reaction "OH F OH H OH E HO : G K and use the letter code corresponding to each compound in the blank to indicate the expected prod…
    • The largest atom: Na, K, S b) The smallest atom: N, O, Ca c) The isoeletronic ions: Â3919K+, Â3115P3-, Â2412Mg2+Â d) The largest atom: Ba, Ca, Cs, Na
  • How many moles of oxygen will occupy a volume of 22.4 liters at STP contidions? Given: Find:
  • Compare a calculation using the Clausius-Clapeyron equation to the tabulated values below: T = 25.0 .C, P = 23.8 torr (you can choose if you want to use T and find P, or use P and find Ho…
  • What volume will 1.00 mole of nitrogen occupy at STP conditions?
  • . Ionic Compounds – Google Chrome X https://session.masteringchemistry.com/myct/genericTutorialRender?assignmentProblemID=182933605&partID=26&player=tool_content&src=html%3AconceptMap%3F…
  • 750 g of CaCI .2H O is reacted with 1.100 g of Na, CO, to form a precipitate of CaCO,. What is the theoretical yield of CaCO? What is the limiting reactant? If 1.010 g of CaCO, was formed in an e…
  • (3 points) Gallium metal is a solid at room temperature but melts at a surprisingly low temperature (about 29.8 .C!). Estimate how much heat is required to bring a 10 g piece of gallium from 20 C t…
  • When a 1.000 g sample of a hydrated salt was heated so that the waters of hydration were driven off, the mass of the anhydrous salt remaining was found to be 0.639 g. If the formula of the anhydrou…
  • At what temperature will 70.9 g of Clz exert a pressure of 1 atm at a volume of 22.4 L? Find-
  • Write complete balanced, total ionic, and net ionic equations given these reactants: Na PO (aq) +CaCl(aq) –>
  • Given: Find: P= n 3. What volume will occupied by 44.01 g of CO2 at STP conditions?
  • Using photoelectron spectroscopy, the ionization energy of the least tightly bound valence electron on Cl was determined to be 13.0 eV. Calculate the Zeffective for this electron.
  • CHM 111 Lab Final Exam Review (show all work, watch significant figures and units on all numbers) 1. How many miles are there in 1855 meters?
  • Calculate Zeff for a valence electron in aluminum using Slater’s rules. Submit an answer to two decimal places.
  • Calculate Zeff for a valence electron in Cr using Slater’s rules. Submit an answer to two decimal places.
  • B: Hand Draw the following molecules 1. 4-ethyl-2-methylhexane 4. 1-bromo-2-chlorobenzene 2. 2,3,3-trimethylpentane 5. 1,4-hexadiyne 3. Isopropyl cyclopentane
  • A: Use the IUPAC naming system to name the following compounds. CHURCH CH CHS CH2 CH. CH CH CH, CH. CH CH CH CH- CHE CH CH CH2 CH -CH CH CH 4 CH H CHE H 5 CI 2. HCEC CH -CH2-CH, CH -CH. 3 H 6. B. Hand…
  • Kb for C5H5N = 1.7 x 10-9. 0.00 mL HCI added 30.00 mL HCI added 100.00 ml HCI added 150.00 mL HCI added no: H+ yes: H20 no v Ht no v Ht no: CI- no v HO V H+ yes: C5H5N no v HO no v CI v HO no: C5H5NH+…
  • what would be your recommendation in terms of filter selection to filter slurry water to remove calcium carbonate ? this question is asked in waste water treatment lab report. 5. What would be your re…
  • . A simple way to estimate the speed v of a gas molecule is to assume that the average kinetic energy Ekin = 1/2 m(vx3 + v)+ v.") = 1/2 my is equal to the average energy that is stored in the t…
  • please explain,give complete answer. please show work for both parts to help me understand. this is physical chemistry. The Joule-Thompson coefficient (u) for N2 (g) at 300 .C, within the range of …
  • You’re the best! ❤️❤️❤️. Chemistry Reg Study Guide 1. Approximately how many atoms of gold are present in two moles of gold? 2. What is avagadros number? (It’s that big number for particle…
  • a and b please. AgNOS a) A current of 1.50 Amperes passes through a solution of AgNO3 for 3.0 hours. What mass, in grams, of silver collects on the cathode? (molar mass of silver = 107.9 g/mol) (3 poi…
  • . miyako i X The Motl x 1 gmail – S X Inbox (3 X |M Inbox (3) x 1, miyakoi x 1, bomb G https://learn.humber.ca/ultra/courses/_199448_1/grades/assessment/_13451223_1/overview/attem Question 10 9 Poin…
  • Thank you! ❤️❤️❤️. 8. THIS IS A MASS-MASS STOICH THING The following reaction shows calcium chloride reacting with silver nitrate. CaCl2 + 2AgNO, – 2AgCI + Ca(NO;)2 How many grams of Agcl …
  • please draw for part a and b.Â. a) Draw the Lewis structure of NF3. (3 points) b) Draw the Lewis structure of NF4+. (3 points) c) In 3-4 sentences, identify how the geometric structure of NF3 is diff…
  • Please complete Âparts b and d, I already did part a. 1.3.2 Test (TST): Chemistry Foundations Wrap-Up Name: Young Chan Cho EC AP Chemistry Sem Points Possible: 50 Date: Directions: Questions 1 and 3 …
  • Please encode the solution if possible thank you 3. How many grams of NaOH dissolved in 350g of water to produce 41% by mass alkaline solution? 4. Calculate the no. of grams of water needed to dissolv…
  • Please show visual. Thank you. command Course Hero 10. Create a representation of silicon dioxide (SiO2) that shows it as a network covalent solid. (1 point) tation of a methane (CH4) molecule that sh…
  • Encoded solution if possible thank you Solve the following problem completely: 1. Determine the % of C6H12O6 if 25g of C6H12O6 dissolve in 50g of water? 2. Determine the ppt, ppm ,and ppb if the disso…
  • Create a scenario so that one ingredient is limiting and one ingredient is excess. – Create another scenario with another ingredient limiting it and another ingredient being excess. Calculate excess i…
  • Please do parts alb,c,d and illustrate for me. I will give good review! Thank you.Â. 5. Create representations using each of the following methods to show the formation of lithium oxide, Lizo. a. Ele…
  • What is the volume of 1.0 moles of hydrogen at 1 atm and 273.15 K?
  • need help figuring out solubilityÂ. Consult a solubility chart to answer the following question. In the reaction of K2504 (aq) + Ba(NO3)2 (aq), a solid is produced. O True O False
  • . Question 12 9 Points Provide the balanced equation (3 points), complete ionic equation (4 points), and the net ionic equations (2 points) for the following reaction (9 points total): NaCl(aq) + H2…
  • “The air pressure in millibars (PMSL) is shown in the bottom graph of the meteogram. From 02Z 15 February until 02Z 16 February, as the low pressure and fronts approached Pittsburgh, the air pressure …
  • Mendeleev card. Show your calculations for: Element Mass (Horizontally the average between 2 neighboring elements left and right.) Melting Point (Vertically the average between 2 neighboring elements …
  • . ko i X The Motl X L gmail – S X Inbox (3 X | Inbox (3) X L miyakoi x /b b https://learn.humber.ca/ultra/courses/_199448_1/grades/assessment/_13451223_1/overview/at Question 13 9 Poin Provide the b…
  • Mandeleev card. Name 1. On your first attempts, describe how you decided to order the elements. Explain your reasoning, and why it worked or didn’t. 2. On your final attempt, describe how you ordered …
  • Answered The conjugate acid of HBO, 2- is ; while the conjugate base of H20 is A H, BO, ; OH B OH- ; H,Ot C H, BO,; Oz D BO, 3- ; HO +
  • . 6) Given the following atomic orbital energy (e V): AO O AO F 2s -32.3 2s -46.4 2p -15.9 2p -18.7 a draw a MO-correlation diagram of OF (62pz lower than 12px, 72px). sketch all occupied antibon…
  • . 5) Given the following atomic orbital energy (eV): AO C AO N 2s -19.5 2s -25.5 2p -10.7 2p -13.1 a draw a MO-correlation diagram of CN (62pz higher than 72px, 72px). b sketch the lowest occupied m…
  • . 4) Valence bond theory and hybridization a The structure skeleton of a mysterious organic molecule is shown below. Add lone pair(s) and partial charges so all atoms have octet of electron. H C – N…
  • A reaction used in industry has a rate law that is "rate = k[C]". What is the reaction temperature if the necessary rate is 2.00 x 10"M/sec and the concentration of C has to be maint…
  • . AutoSave OFF w 07_Enthalpy_PostLab_S22 Home Insert Draw Design Layout References Mailings Review View ? Tell me Share Comments Arial V 11 A A Aa Ap AaBbCcDd AaBbCcDdEe AaBbCcDdEe AaBbCcDdEe AaBbCc…
  • . 3) Given the bond length of SO is 1.500 A. The first ionization energy (IE1) of S is 1000 kJ/mol and the electron affinity of O is -140 kJ/mol. a) Assuming full charge separation in SO, calculate …
  • How do the properties of polyurethane foam differ from teflon, HDPE, mater-bi, and nylon
  • I did research and these look wrong. Also the electrons on Mg+2 I got 10 not 8, I also got for 39/19 K Protons-19 Neutrons-20 Electrons- 19. Also for Ag+1 i got 46 electrons not 48 jQuery2240443996687…
  • . 2) For the following molecules. 0 Draw the Lewis Dot diagram (if applicable, show all valid resonance structures and formal charges). 0 Use VSEPR to determine the molecular geometry (label key bon…
  • Write complete balanced, total ionic, and net ionic equations given these reactants: NazPO4(aq) +CaCl2(aq) –>
  • A 5.25 g sample of silicon flakes is added to an irregular flask. Ethanol, in which the solid Si is insoluble, is added to the flask so that the total volume of solid and liquid together is 15.00 m…
  • Identify the element with larger first ionization energy IE1, briefly explain why. 1- P and S 2- Ca and Ga 3- K and Rb
  • In the first few chapters, we came across scientists who made some key scientific contributions, which is the foundation for modern-day science. However, even today scientific discoveries are continui…
  • Important Terms: Direct relationship: A relationship between two variables, where a change in one variable results in the same change in the other variable. For example, if one variable is increased, …
  • Using the volume control arrows, reduce the volume of the gas to 1.701. In the space below record your observations regarding the behavior of the particles in the gas sample as the volume is reduce…
  • P1 = 1.00 atm P1 = 1.50 atm P, = 2.00 alm P. = 2.50 atm P, = 2.90 atm VI= V= V= V.= 5. Based on the data collected in the table above, what trend can be observed for volume of a gas when the pressure …
  • Which one of the three variables: Pressure, Volume or Temperature cannot be changed in Boyle’s Law? This variable is considered a constant.
  • Press the reset button at the top right of the screen. Using the pressure control arrows, reduce the pressure of the gas to 0.700atm. a. In the space below record your observations regarding the be…
  • Briefly describe, in your own words the meaning of each of the following variables, and common units of measurement associated with cach: 6. Pressure c. Temperature
  • Solve for "x" in the following algebraic equations and report your final answer with the correct number of significant digits: a. (1.34)(5.46) = (1.76)(x) 4.38 X 6. 332 267 2.25 4.85 C. 2…
  • NCP Case Study: Instruction: Nutrition Diagnosis:. Review the NCP Case Study document, instructions, and Nutrition Diagnosis handout.Think of one nutritional problem for MJ and write a PES (Problem, E…
  • I need help with solubilityÂ. Consult a solubility chart to answer the following question. In the reaction of NaCIO3 (aq) + AgNO3 (aq), a solid is produced. O True O False
  • Balance the reaction shown below: KNO3 + Cas(POA), – K3POA + Ca( NO3)2 Once balanced, given 0.395 moles K NO2, calculate the grams of Ca (NO3), produced.
  • Balance the reaction shown below: H2CO3 + NaOH -> NazCO3 + H20 Once balanced, given 0.71 moles H2CO3, calculate the grams of HO produced.
  • D Question 8 At 30- C. how much sodium nitrate is dissolved in 300 grams of water?
  • Balance the reaction shown below: C3 H8 + 02 – CO2 + H20 Once balanced, given 0.589 moles C3 Hg, calculate the grams of H2O produced.
  • Balance the reaction shown below: Mg + HCI – MgCl2 + H2 Once balanced, given 0.222 moles Mg, calculate the grams of H2 produced.
  • Balance the reaction shown below: H,SO4 + NaOH -> NazSO4 + H2O Once balanced, given 0.461 moles H2SO4, calculate the grams of H2O produced
  • Write the objectives IN YOUR OWN WORDS: Summarize the Experimental Procedures(A,B,C,D,E) IN YOUR OWN WORDS in bullet points:
  • Rank the following in their electronegativity from most electronegative to least. Â phosphorus potassium fluorine silicon lithium
  • Balance the reaction shown below: C5 H12 + 02 – CO2 + H2O Once balanced, given 0.762 moles C’s Hip, calculate the grams of HO produced.
  • Can an expert please help on doing questions C and D. Im very confused.. AH AS AG 2) An Example of Thermodynamics in Biological Systems a) Find AH, AS and AGo for the oxidation of glucose to carbon di…
  • . What mass of carbon dioxide was produced? . .. Sulfur dioxide emissions contribute to acid rain. In 2010 1.9 x 10′ kg of sulfur dioxide, SO2, was emitted by vehicles. Calculate the number of moles…
  • Consider the following compounds. Which is/are soluble? Select all that apply. Â Ba(OH) 2 NH 4 OHÂ Be(OH) 2 Sr(OH) 2 LiOH Fe(OH) 3 KOH
  • Convert 97.4 grams of NaCl to moles. (show all work) 15. Convert 32.6 grams of H2O to moles (not on computer do this one on your own) 16. Convert 77.2 grams of CH4 to molecules. (Show all work) 17…
  • Why should the solvents with the stronger interactions have smaller magnitude Âvalues as the solvent evaporates?
  • Help Asha balance the following equation by completing the equation with the correct numbers:__H 2 + __O 2 __H 2 OÂ Â Help Asha balance the following equation by completing the equation with the cor…
  • Can you please help me get started with this. I’m super lost on how to do it.. 2) An Example of Thermodynamics in Biological Systems a) Find AH, AS and AG for the oxidation of glucose to carbon dioxid…
  • Question 23 9 pts Reaction rates depend on many different factors including temperature. When the temperature increases so does the reaction rate. Explain why/how that changes the reaction rate. What …
  • Question 22 8 pts An unknown substance was found to be highly soluble in water and the resulting solution was found to not conduct electricity. When 394 grams of the unknown substance was added to suf…
  • The brand new compressed air tank you received for your birthday for your paintball endeavors can hold a volume of 68 in’ at 4500 psi. What are these values in L and atm? If you empty out the tank …
  • Question 21 8 pts The element americium is used in smoke detectors. It is radio active and has a half life of 462 years. A quick internet search reveals that smoke detectors should be replaced after a…
  • Question 20 8 pts The following reaction is second order in A and the rate constant is 0.025 M-1s-1: A – B The concentration of A was 0.84 M at 29 s. The initial concentration of A was M. For full cre…
  • The decomposition of [A] in solution at 80 .C proceeds via the following reaction: nts A (aq) – B (aq) The dependence of the rate constant on temperature is studied and the graph below is prepared fro…
  • Consider the solution forming process for two solutions: A) propanol in hexane and B) ethylene glycol in hexane. Briefly explain at a molecular level why ethylene glycol is much less soluble in hexane…
  • A hydrogen atom emission is observed with a photon released at 1 = 1.09419 x 105 nm, what is the initial quantum number? The final quantum number is ny = 3, because the wavelength is in the infrared n…
  • When visible Light with a wavelength of 404 nm is shone on a particular metal surface. electrons are ejected with a kinetic energy of 5.23 x 10’20 J. What is the longest wavelength (nm) of light that …
  • . Phosphoric acid is a triprotic acid whose salts can be used as buffers. It has the equilibrium constants Kai = 7.1 x 103, K22 =6.3 x 108, and Kas = 4.2 x 10-13. a) Write the three chemical equatio…
  • Ammonia, NH3 , is a weak base with a Kb value of 1.8 x 10-5. Part A What is the pH of a 0.360 M ammonia solution? Express your answer numerically to two decimal places. View Available Hint(s) AEd ? PH…
  • Why does solid elements on the periodic table have more specific heat than the gases on the periodic table?
  • this is for Chem lab. (3pts) 5. How would you expect the behavior of barium (Ba) in water to compare with the behavior of Cs? Explain. Normal X2 X2
  • The ‘Lowell System’ was characterized by… a. A system of interchangeable parts for factories. b. The development of cottage industries. c. An industrial system of mass production. d. The adoption of…
  • study the list of actions sometimes taken by slaves In the Antebellum Er Pretending to be sick . Breaking tools . Working slowly 6. Which title best completes this chart? a. Everyday Resistance to Sla…
  • Hydrogen Gas and Oxygen Gas react to produce water vapor. If you start with 1.5 moles of each reactant, how many moles of water vapor would you produce?
  • A certain weak acid, HA, has a Ka value of 2.0×10-7. Part A Calculate the percent ionization of HA in a 0.10 M solution. Express your answer to two significant figures and include the appropriate unit…
  • A solution is 15.5 millimolar for Lithium Chloride. If 1.00 L of the solution weights 1.00 kg, what is the mass percentage of the solution?
  • Can you actually measure the mass of atoms using a scale like the one in this lab? Explain. In your post, share the percent abundance and atomic mass of the isotopes in each of the three mixtures you …
  • Can someone help me with this question. 4. Stoichiometry Gold is a notoriously unreactive metal which makes it good for electronics and jewelry, because it doesn’t tarnish. However, this same property…
  • Can someone help my with this question. 5. Stoichiometry The first reaction from the previous equation is also notorious as being the cause of death when cleaning. The mixture of bleach with hydrochlo…
  • NH2CI (no H-Cl bonds. Lewis 1. Show all of your work. The expectation is that you show how you determined the number of electrons to go on the structure, show the skeletal structure, the process o…
  • For the description given write the complete balanced chemical equation, balanced and including the state functions. Vanadium (II) Sulfate and Lithium Chloride aqueous solutions are mixed and react by…
  • Reaction 1: AB → A + B Δ r H = +75 kJ Reaction 2: A + CD → AC + D Δ r H = -50 kJ Reaction 3: BD → B + D Δ r H = -125 kJ Net Reaction: AB + CD → AC + BD TR 1. Demonstrate how reactions 1-…
  • a) and b) please in french. b) Meme si la derniere etape de la synthese du methanol possede une constante d’equilibre de valeur elevee, sa progression est lente. Pour augmenter son rendement, on ut…
  • Determine if the following compounds are polar or nonpolar. a) Baclofen b) Cephalexin c) Diphenhydramine d) Ibuprofen e) Salicylic Acid f) Tylenol
  • in french please. 16. Le bicarbonate de sodium, communement appele < soda a pate >>, se decompose sous l’effet de la chaleur selon l’equation ci-dessous : 2 NaHCO, + Chaleur = Na,CO(5, is) + …
  • in french please. 12. La constante de dissociation de l’eau varie selon la temperature, comme le montrent les donnees du tableau qui suit. Temperature (en *C) Constante de dissociation de l’eau 0 1, 1…
  • in french please. 3. Vous trouvez une solution d’acide fluorhydrique (HF) dans une armoire. Afin de determiner sa concentration, vous mesurez le ph de la solution : il est de 2,6. Quelle est la concen…
  • in french please thanks. 2. Noemie ajoute quelques gouttes d’un indicateur de pH a 100 ml d’une solution a 0,02 mol/L d’acide chloreux (HCIO2) et a 10 ml d’une solution a 0,2 mol/L d’acide nitreux (HN…
  • . X Module 03 Dr. Laila Malik has been tasked to help her graduate student with making a ground-breaking molecule, but she has to start with helping the student understand how different elements bon…
  • in french please thanks. 8. L’etiquette d’une boisson energeticue indique qu’elle contient environ 80 mg de cafeine (CaH10N402) par portion de 250 ml. Si la cafeine est une base faible ayant une const…
  • in french please. 7. L’ethanol (C2HOH) est un alcool que renferment la plupart des boissons alcooliques. Il peut etre produit par la fermentation d’hydrates de carbone (sucre ou amidon) contenus natur…
  • Convert 73.8 cm into nm. (Express this in scientific notation and show your work) x Yo 73. 8 amx 1/ m x XMARY nm 1,000 2. Simvastatin is a compound used to treat high cholesterol and has a chemical…
  • Hint X In this problem, several small volumes of the standard solution are added to the unknown solution and the fluorescence intensity is measured after each addition. Begin by constructing a standar…
  • > Feedback X There are two different methods that can be used to solve this problem. In the first method, start by calculating the concentration of the Cd2+ standard in each of the volumetric flask…
  • > El Feedback X The concentrations of the Cd standard solutions can be calculated using the dilution equation, €1V1 = 621/2 where C] is the concentration of the Cd stock solution, V1 is the volum…
  • https://www.google.com/url?sa=t&source=web&cd=&ved=2ahUKEwjP39Wqv5b2AhWlFjQIHW-CBn4QFnoECCcQAQ&url=http%3A%2F%2Flinus.chem.dept.ku.edu%2FGenChemLab%2F135SP17%2FDownload135Files%2FIodin…
  • Give the number of valence electrons for Xel. O 24 O 20 O 16 O 18 O 22. Choose the best Lewis structure for Xel2. O :1-Xe-T: 0 :1=Xe=1: 0 :1=Xe=1: O :!-Xe-1: O :1-Xe-Y:. Draw the best Lewis structure …
  • Assume A –> B + C is a first order reaction. The rate constant for the reaction is 4.92 (1/s).  What is the 1/2 life (t 1/2 ) in seconds?  With a breakdown please.
  • What is a way to identify you have to use the suffix “acid” just by looking at the chemical formula?
  • List the main types of paint classified by end-use  2. Define: lacquer, enamel, primer, clear coat, crosslinking, pigment, and binder  3. List the main components of paint  4. List 4 types of…
  • . 11:22 X Courses X Module 03 i Question 8 1 Point Dr. Laila Malik has been tasked to help her graduate student with making a ground-breaking molecule, but she has to start with helping the st…
  • How do I calculate the initial [I]?. initial [I~] 0.15 LM /L 0.15 0. 15 0.15 Calls
  • List the main types of soils  2. List the main components of soil  3. Describe a sampling method for social. (Regarding forensic examination)  4. List 4 types of cases where soil can be usefu…
  • A piece of hot copper at 92.8°C weighing 35 g is added to 272 g of water at 21.3 °C in a coffee cup calorimeter. The specific heat capacity for water is 4.184 J/g·°C and the specific heat of cop…
  • How much work can be performed if 18.2 g magnesium is reacted with excess hydrochloric acid to produce hydrogen gas at 1.05 atm and 21°C? The balanced reaction is as follows: Mg (s)  + 2 HCl?…
  • If it takes 1.3 times longer to fill a 1.5L balloon through diffusion using Krypton (Kr) gas than a gas of unknown identity, what is the molar mass of the unknown gas?
  • The relative reactivity, or activity, of different metals can be determined by studying their single-replacement reactions with other metal compounds. Rank the following metals, copper, zinc and silve…
  • For PSU Chemtrek Experiment 7 post lab question 10 How do you calculate the time it would take for the reactants to reach the center of the drop in step 5 if the process was governed only by diffusion…
  • A new heat resistant composite material was developed that is also extremely light weight. SpaceX is interested in this material as a coating for their newest spacecraft to help withstand the high…
  • pboard N Font Paragraph IN Styles Ny Voice Editor Reuse Files Color of Activity Initial Color of Initial Final Type of Items Final Items Temp. Temp. Observations Change Explanation (c) (c) HCE colorle…
  • Clean-coal technologies (CCTs) could counter the harmful environmental effects of coal use. There are advantages to the people of Alberta in developing CCTs. Â a. Describe one benefit from an economi…
  • A student tested a solution with the indicators methyl orange and litmus. During the testing, the student observed that the methyl orange indicator turned yellow and the litmus indicator turned red. T…
  • For the reaction shown, calculate how many grams of each product form when the following amounts of reactant completely react to form products. Assume that there is more than enough of the other r…
  • Dear tutor. Please only solve c and d. I also posted other parts if you are interested to look for them and solving them. I always give Thums up to smart tutors who solve in a neat and correct manner….
  • Consider the following unbalanced equation for the combustion of butane. C4H10(g)+O2(g)→CO2(g)+H2O(g) Part A: Balance the equation. Express your answer as a chemical equation. Identify all of th…
  • How do you decide which element goes first in the name of an ionic compound? 2. How do you identify that you have used a polyatomic ion name for a compound?
  • Consider the reaction between NiS2 and O2: 2NiS2(s)+5O2(g)→2NiO(s)+4SO2(g) When 11.2 g of NiS2 are allowed to react with 5.43 g of O2, 4.18 g of NiO are obtained.  Part A: Determine the limiti…
  • For the reaction shown, find the limiting reactant for each of the initial quantities of reactants. 2K(s)+F2(g)→2KF(s) Part A: 1 mol K ; 1 mol F2 Express your answer as a chemical formula.  Part B…
  • For the reaction shown, calculate how many moles of NO2 form when each amount of reactant completely reacts. 2N2O5(g)→4NO2(g)+O2(g)  Part A: 1.3 mol N2O5 Express your answer using two significan…
  • Name the compound SnI2Â A. stannous iodide B. tin (II) diiodide C. tin iodide D. tinnic diiodide
  • The chemist uses a simple calorimeter and reacts 0.466 g of magnesium ribbon with 100 mL of 1.00 mol/L HCl(ag). The initial temperature of the HCl(ag) is 20.1.C. After the reaction, the highest record…
  • 1-3. 19 cols Add-ons Help Last edit was 2 minutes ago Open Sans – 10.5 + B J U A & G P O . B . B3 X E . E 6 . E. Follow-Up Questions 1. What are the chemical formula and the dissociation reaction …
  • For covalent molecules,what do you need to include in the name that you didn’t have to include for ionic compounds? 2. How does the name of the negative ion (anion) changes when is part of a molecu…
  • Food items are ketchup, milk, fruit punch, sprite 11. Cough syrup, nasal decongestion medicine, tylenol. w Docun @ outline w|lesson ) COM2 ) Lab 6: ) Lessor @ Lab 12 5 Lat X G apa in /d/1zqMO5pKOO…
  • . History Bookmarks Develop Window Help Chem test 2 Practice.pdf bb-gbc.blackboard.com BLACKBOARD GBC MAIL MICROSOFT OFFICE HOME ILC HP INSTANT INK ClaimSecure OSAP NSLSC STU-VIEW Balancing Che..al …
  • Essay Question #1 -ÂName the following acids and provide an explanation of how you determined the name. a)  b) ÂC) Essay Question #2 – Determine the pH of a solution that has an concentrat…
  • . Newton’s law of heating is given by the formula: _ 4:: T— Ta —l— [To — Tfl)e Ta: temperature of the surrounding air in the oven To: the intial temperature of the foodstuff t: time in ho…
  • How do I find the answers for the middle three columnsÂ. F. Electron-Dot Formulas and Shape Formula 1. Electron- Dot 2. Number of | 3. Electron- 4. Number 5. Shape 6. Polar or Formula Electron Group …
  • I need to solve for the Moles of HIO3 for each test tube and then get the mol/L Âof HIO3 for each test tube. All the information to obtain these values will come from this table using 0.01M and the m…
  • Introduction being solved er Supporting Evidence IMexultat Remoring that Connecta Csiders to the Chim Ourwab dabdrued Result and blicunion DCakesusher)
  • Name the following pairs of compounds: a. SnCI, SnCIA b. Mno MnO2 C. FeO Fe,03
  • At approximately what temperature does carmelization take place? Select one: a. 130∘∘C   b. 160∘∘C   c. 150∘∘C   d. 170∘∘C   e. 140∘∘C
  • Make 4 tubes of x5 serial dilutions (Label tubes #1- #5) ÂÂÂÂÂÂÂÂÂÂÂ Tube#1, add 100 uL of serum into 400 uL of saline ÂÂÂÂÂÂÂÂÂÂÂ Calculate the dilution for the first tube: s…
  • Calculate the amount of energy (J) required to remove an electron from an atom of Fe (iron) if the wavelength of a photon required to deliver this quantity of energy is 1.98 x10-9 nm. Show all work
  • Many chemicals have common names. Give the chemical names for the following: a. lime, CaO d. chalcocite, Cu,S b. alumina, Al203 e. magnesia, Mgo c. calcite, CaCO, f. baking soda, NaHCO, 2. What are…
  • Given the reaction below answer the following questins: H 2 CO 3 (aq) + H 2 O 1. Does the reaction completely ionize? Explain your answer. 2. Name the conjugate acid. 3. Write the formula of the stron…
  • Predict the chemical formula for the ionic compounds which would be formed with the following pairs of positive and negative ions: a) Agt and Cl f) Nat and NO3 b) Nat and O2- g) Cat and OH c) Mg2* …
  • Need help with last part. Measurement and the other in sig fig.. please thanks. ent C newconnect.mheducation.com RATION . CONCENTRATION OF VINEGAR ODUCTION LABORATORY SIMULATION Lab Data X 16 You have…
  • Listed below are the common names of minerals and their chemical formulas. Complete the table by identifying the positive and negative ions in the formulas. Mineral Formula Positive lon Negative lo…
  • How many kinds (the main kinds) of non-enzymatic browning are there? Select one: a. 2 Â Â b. 4 Â Â c. 1 Â Â d. 3
  • What are the substrates (reactants) of Maillard reactions? Select one: a. sugar and amino acid   b. fatty acid and glucose   c. fatty acid and amino acid   d. sugar and fatty acid
  • Make a speech on Contribution of novel Prize laureate in chemistry 2021 and their contribution to the society.  make long as possible and provide links of the websites where the data are taken.
  • What is a measure of the size of the electron clod or the region where electrons can be found ?
  • 5) A hot piece of copper was dropped into 155 mL of water at 23.6 C and 2.1 KJ of energy is transferred to the water. What is the final temperature of the water? 6) When 5.00 grams of ammonium chlorid…
  • [References] Hydrogen lodide decomposes when heated, forming H2 (g) and 12 (g). The rate law for this reaction Is – [HI]/At = [HI]. At 443 .C, k = 30. L/mol . min. If the Initial HI(g) concentration i…
  • The dimerization of C4H6 is a second order reaction. A sample of .0093 mol was heated in a 1 L flask. After 480 seconds 21% had dimerized. Calculate the rate constant for this reaction.
  • answer these questions please. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ÂÂ Q1) The molecule below has been identified as one of the possible metabolites of amoxicillin. What is the n…
  • Refer to the following scenario to respond to Q1-Q3. A sample of iron ore was analyzed by dissolving a 1.11324 g sample in concentrated HCl. The resulting solution was diluted with water and the ir…
  • . Problem 5: i. Describe the role of each term for determining PID output, u(t). u(t) = Kpe(t) + K, | e(t) dt + Kade/dt 0 i. Comment on whether a controller with only a Kp term can bring a system cl…
  • . Problem 2: i. Draw the configuration in which a simple resistor-capacitor combination can serve as a (i) low pass filter and (ii) high pass filter. ii. Assume that R = 10 kOhm and C = 100 nF, plot…
  • Chemical nomenclature is an important skill that you will use outside of this class. In many ways, it is a primary skill needed in pharmacology and medicine. For example, a common imaging agent use…
  • What research problems should chemists be working on? ÂWhat is most pressing and could benefit from the talents of chemists? Most of us are taxpayers so we theoretically have a say onÂhow federa…
  • . Use the following to answer the next 3 questions. The smelting of iron occurs in a blast furnace, as represented by the following overall equation. Step I 3Fe203(s) + CO(g) – CO2(g) + 2Fe3 04(S) A…
  • Key Questions 3. Finish the equation below that allows for the calculation of how much the freezing point of a liquid is changed when it serves as the solvent of a solution of nonvolatile solute parti…
  • Which intensive physical property is observed when the droppings of a person seated inside a closed room has able to reach a person who is 1 meter away from him after sneezing? If you were that pe…
  • Place the following compounds in order from most soluble to least at 50 degrees Celcius. KNO3, KCl, NaCl, KClO3, Ce2(SO4)3
  • . Ami Patel Chemistry 02-23-22 Percent and Theoretical Yield Practice Percent Yield For each theoretical and actual yield listed, calculate the percent yield. 1. Theoretical: 78.43 g Actual: 66.4 g …
  • Full essay research Âpaper on Gentrification in Echo Park California.
  • While working on the development of a new electrochemical cell, a research chemist places selected Period 4 transition metal strips into aqueous solutions of their ionic compounds. She observes tha…
  • SCH 4U1 TEST-CHAPTER 1(Redox Reactions ) Name: ; Date: /10 /15 13 Com Ing App Communication ( /10 Marks) Answer the following questions directly on the page. If necessary, attach a separate sheet of p…
  • can someone check this for me please.. Give the formula for each of the following: Copper (11) oxide CuO Mercury (II) sulfide Has P transitionmetal Potassium phosphide not a Carbon monoxide CO Aluminu…
  • . Activity 4: Knowledge Check on Percent by Volume Concentration! Direction: Solve the given problem. You may use a separate sheet of paper. A brand of rubbing alcohol savs. it contains 70% (vol /vo…
  • grade 9 science. X + ontario.ca/d21/Ims/quizzing/user/attempt/quiz_start_frame_auto.d2/?ou=21067477&isprv=&drc=1&qi=6816802&cfql=0&dnb=0&fromQB=0 Quiz # 1 Time Left:0:32:17 Man…
  • There are many important applications of electrochemical processes, like rechargeable batteries, fuel cells, the coating of objects, and breathalyzers. There are even applications in medicine. Res…
  • grade 9 science. me Left:0:32:58 Manreet Deol: Attempt 2 Next Page Question 9 (1 point) Which one of the following substances is an element? Water Salt Helium Milk Next Page Submit Quiz 8 of 20 questi…
  • grade 9 science. ( point) Which one of the following statements about the particles in a piece of silver is incorrect? All of the particles have the same mass. The particles are always moving. There a…
  • grade 9 quick. point) Which term describes a substance that can be stretched into a wire? ductile malleable conductive lustrous Page 6 of 20 Next Pape
  • science grade 9. uestion 4 (1 point) All of the following statements are part of the particle theory of matter except one. Identify the exception. Different substances are made of different particles….
  • . 4. Using the experimental and actual percentage of magnesium, calculate percent error. o E= 25.530 – 28.2% X 100% = 10 : 25.53% Post-Lab Questions calculations. 1. Identify and discuss two possibl…
  • . Table 5. Concentration of Reactants Calibration of Droppers Solution Drops in 1 mL Volume per drop (mL) 0.01 M HIO3 20 0.05 0.01 M H2SO3 20 0.05 H2O 28 0.04 Test 0.01 M HIO3 Volume 0.01 M Moles HI…
  • Explain thoroughly the color changes that happen before equivalence point and at end point in the assay of zinc oxide.
  • Instructions Your task is to complete the questions in the problem set. Please note that you must include units throughout all of your calculations, and provide your answer in scientific notation to t…
  • . Ammonia has been studied as an alternative "clean" fuel for internal combustion engines, since its reaction with oxygen produces only nitrogen and water vapor, and in the liquid form it …
  • Reacting Mg with HCl Solution Complete ionic equation
  • Describe the similarities and differences of the following concepts below through a VENN DIAGRAM: 1. London Dispersion Forces 2. Dipole-dipole Forces 3. Hydrogen Bond
  • For the reaction of chromium metal with chlorine gas (below) you have 858.42 kg of chromium metal, and 1,729.52 kg of chlorine gas. ( Give your answer to two decimal places – even if that’s not th…
  • How much calories is required to change 600 grams of ice at -2 degrees Celsius to steam at 120 degrees Celsius? Note that Lf is 80 cal/g and Lv is 540 cal/g
  • . 11. [Exchange interaction] For the He atom, assuming a distance between electrons of 0.3 nm and 0.31 nm, for parallel and antiparallel spin states, respectively, estimate the order of magnitude of…
  • can you answer these questions please.  Q1) A potassium chloride solution has a concentration of 2 mol L-1. ‏Extra information: The molar mass of potassium chloride is 75 g mor¹. ‏ What is the …
  •  Complete the following problems, showing all work and highlighting your answer: 1. A 3 M (molar) solution means there are 3 moles of solute dissolved for every 1 liter of solvent. a. How many…
  • Learning Task #2 Direction: Supply the missing information on the difference between the properties of solids and liquids in relation with kinetic molecular theory, For the explanation column, maximum…
  • . Activity 11: Knowledge Check on Solution Stoichiometry! Direction: Solve the given problem. You may use a separate sheet of paper. How many ml of 0.250 M HCl would react exactly with 30.0 mL of th…
  • Describe the overall objective and make a hypothesis.
  • . Activity 5: Knowledge Check on Percent by Mass/Volume Concentration! Direction: Solve the given problem. You may use a separate sheet of paper. The label of betadine skin cleanser savs 7.5 % solut…
  • Topic: Acid-Base Balance A. Why is the bicarbonate-carbonic acid system is the most important buffer system in extracellular fluids? State at least 3 reasons. In a bullet form, explain the role of t…
  • At what pressure would 14.4 grams of oxygen gas occupy 7.5 liters at a temperature of 375 K? 6. What is the pressure of 0.60 moles of a gas if its volume is 10.0 liters at 35.0.C?
  • 11: Gases 78. The oxygen gas emitted from an aquatic plant during photosynthesis is collected over water at 25 "C and a total pressure of 753 torr. What is the partial pressure of the oxygen gas?
    • What are the anodic and cathodic Tafel slopes for the magnetite-coated electrode at 30 °C? Use the high-field approximation equation for an anodic current and any point on the anodic leg of the po…
  • Create your own brochure featuring the unusual properties of water, its significance to life, and how these properties may be explained by its structure and intermolecular forces.. Learning Task 4: Br…
  • What is the percent composition of each element in C 3 H 8 O 2 ? Â What is the empirical formula of P 4 O 6 ?
  • . Prelab: 1. You Will not be given the 0.00200M F e(N 0930″,) solution so you will need to make this solution first. You are given 0.0200M F e(N 03)”an solution. Explain how you will make this …
  • Test solution Results Explanation a) Glucose Completely dissolves in water When a glucose molecule is placed into water the negatively charged oxygen ions attract and surround the positively charged O…
  • Hello there!! :)) I’m a little bit confused on how to calculate the “change in moles” and also im a little stuck on how to calculate the “final moles” as well! ÂLike I keep getting thr “predicition” …
  • Part 1. Determine the molar mass of a 0.314-gram sample of gas having a volume of 1.6 L at 287 K and 0.92 atm. Show your work.
  • The last 2 parts please. TION . CONCENTRATION OF VINEGAR UCTION LABORATORY SIMULATION TV ab Data X Standardized NaOH (M) 0.3757 Initial volume of buret (mL) 0.21 16 Volume of vinegar (mL) 10.00 Observ…
  • An investigation into fraud has resulted in the seizure of a notepad. Bank account and sort code details have been scruffily written on it, but without a date. A suspect has provided samples of reques…
  • Please help me with these 2 problems about light. Thank you
  • One pen color its I know this because of the dye (Blank 2) Blank # 1 A Blank # 2
  • Can I use cotton fabric with coffee filter as the second layer as a face mask? Explain why. Explain it scientifically. be more elaborate. Main Focus : Coffee filter  -I asked this question earlier…
  • Name these ions: a) Mg2+ b) $2- c) Fe3+ d) Br e) N3- 3. What is the trend in the ionic charge of the elements in group 1, 2, and 13 of the periodic table? 4. What is the trend in ionic charges in g…
    • WORKSHEET: DRAWING BOHR AND LEWIS DOT DIAGRAMS 1. Complete the table below Bohr Diagram for Bohr Diagram for lon Lewis Dot Diagram for Lewis Dot Diagram for Neutral Atom Neutral Atom lon lithium B…
  • Need help…. Â. 4. a. If a 100 mM buffer is diluted to 50 mM and is observed to change pl slightly, what is the most likely cause of the pl change? b. Is the buffer capacity of 50 mM buffer X greate…
  • answer all plz!. Equilibrium concentrations of Ca2+ and OH Ca(OH)2 [Ca2+] + [OH ] Choose.. Choose.. Initial 0.00 0.00 Choose Choose.. +X +2x Change Choose… Choose.. 0.00+x 0.00+2x Equilibrium 6.9*…
  • answer all plz!. of Ca(OH)2 in 0.05 M CaCl2. Report Table KSP.5: Titation Calculations (calcium hydroxide solubility in CaCl2 solution) Table view List vie Titration of saturated Ca(OH)2 in CaClz wi…
  • . PROBLEM #3. DO NOT UPLOAD SOLUTION PAPER NOR WRITE YOUR ANSWER HERE. Scanned solution paper must be uploaded in the PROBLEM SET solution papers PDF FILE found in the last item of this form. (15 PT…
  • Describe the relationship shown in this graph by making references to the Collision theory and activation energy.. Rate of reaction (g/s) vs. Temperature of water ("C) 0.04 0.03 0.02 Rate of reac…
  • UNK 1 UNK 1 UNK 1 UNK 1 UNK1 Start 1 min 3 min 7 min 10 min Box 10 Box 1 Question 7: Look at the 1 minute column. Look at the dye that has traveled the farthest. Compare th to the dyes in the red, ora…
  • Refer to the image. Â. Below is the tabulated molecular weight data for a polytetrafluoroethylene [-(C,F4)-]n material. Compute for (a) the number-average molecular weight, (b) the weight- average mo…
  • Can I use Cotton fabric or bandana with coffee filter as the second layer as a face mask? Explain why. Explain it scientifically. be more elaborate.
  • . 4. A temperature elevee, comme celle observee dans les moteurs des vehicules routiers, le diazote reagit avec le dioxygene pour former du monoxyde d’azote, un precurseur de la formation du smog. C…
  • . 10. Du 19 siecle a la seconde moitie du 20 siecle, le charbon (C(s)) etait utilise comme combustible pour alimenter les systemes de chauffage, les trains et les machines a vapeur. On l’utilisait c…
  • . 3. If a 1.25 g sample zinc oxide, 95% ZnO, were treated with 50ml of 1.1230N sulfuric acid in the usual way, what volume of 0.9765N sodium hydroxide would be required in the back titration?
  • what simple alternative materials can be used to make sanitizing alcohol? state the process. what simple alternative materials can be used to make face mask with filter? state the process.
  • (2 points) Quantify the vapor pressure of water in an environment where the temperature is 298.15 K. Precisely report the value with four figures. Chemists and general chemistry students know they …
  • lep= Kc (RT) 2. (2 points) Imagine that 18.016 g H20(s) (ice) at -10.00 C is combined with 180.16 g H2On at 20.00 C in a container that is insulated from the surroundings. Predict the precise final te…
  • iinformation on Pages 1-2. Round all final answers to 3 significant figures unless told otherwise. 1. (2 points) An aqueous solution at room temperature in a sealed container is composed of 44.44 mole…
  • . Show your work on a separate sheet. Clearly number and show work neatly and in order. All numbers must have units; show how units cancel. Do not type in the text box below. A. Calculate the enthal…
  • Part I: Name the following hydrocarbons using the IUPAC rules learned in class: Â. CH3 CH2 CH3 CH3H CH2 H3C-C-C=C-C-C-CH3 1I – CH3H H H
  • Part II: Provide the molecular and structural formulas for the following:: 5. 3,4-diethyl-5,5-dimethylheptane 6. 2,3-dimethyl-1,3-hexadiene 7. 5-ethyl-4,4-dipropyl-2-nonyne 2-ethyl-4,6-dimethyl-3-octe…
  • i need help with this i have to submit after 20 mins please. Part I: Name the following hydrocarbons using the IUPAC rules learned in class: 1. H CH3 H H,C-C-C-C-CEC-H CH2 H H CH3 2 HHH H H-C=C-C-C-C=…
  • . Calculate the wavelengths of: l ‘3’ a) an electron travelling at 1.00 x 105 m 5’1 b) a table tennis ball with a mass of 11 g travelling at 2.5 m 5’1
  • For the reaction of chromium metal with chlorine gas (below) you have 858.42 kg of chromium metal, and 1,741.22 kg of chlorine gas. ( Give your answer to two decimal places – even if that’s not th…
  • Bond Difference in Type of Bond electronegativity (ionic, polar, (AEN) nonpolar ) Ca-O Ca = 1.0; 0 = 3.44 AEN 2.44 ionic N-I P-Br
  • General chem hw i need step to step explanation for the following problems Âand how they were solved and for 7) what exaclty in order is being multiplied and divided to get the answer bcz I’m sti…
  • . Completion Type Direction: Complete what is required by the following table. Copy the table on a separate sheet of paper. Compound Centr AEN Type of Polar Molecule al Bond or Nonpolar Ato Molecule 1…
  • answer all please. (4pts) 3. Explain how the presence of CaCly affects the molar solubility of Ca(OH)2. Use data from your experiment to justify your answer. Normal BITIU X21 X2 1 – (4pts) 4. Based on…
  • Please refer to the photo. Â. If a p-type semiconductor is made up of germanium, which of the following elements could be the dopant: Ga, Si, or P? Show your solution in terms of illustration. The …
  • Please refer to the photo.Â. Some hypothetical metal has the simple cubic crystal figure shown. If its atomic weight is 74.5 g/mol and the atomic radius is 0.145 nm, compute its density in g/cm . (15…
  • . (20 points) A 1 M solution of Cu(NO3)2 is placed in a beaker with a strip of Cu metal. A 1M solution of SnSO, is placed in a second beaker with a strip of Sn metal. A salt bridge connects the two …
  • pleaser refer to the photo. Â. (20 points) A 1 M solution of Cu(NO;)2 is placed in a beaker with a strip of Cu metal. A 1M solution of SnSO, is placed in a second beaker with a strip of Sn metal. A s…
  • . Compute for the relative amount of each phase present in term of mass fraction for a 80% Cu – 20% Ag alloy at 1600F. Composition Cat’s Agi END 1200 2200 000 Liquidus 1000 Liquid Solidus 1 600 BOO …
  • Please refer to the photo. The subject is Chemistry for Engineers. Â. (20 points) A 1 M solution of Cu(NO;)2 is placed in a beaker with a strip of Cu metal. A 1M solution of SnSO, is placed in a seco…
  • . Balance the given redox reaction (20 points) Bi(OH)3 + Sno2 2- > Sno3 2- + Bi (in basic medium)
  • . If a p-type semiconductor is made up of germanium, which of the following elements could be the dopant: Ga, Si, or P? Show your solution in terms of illustration. The number of valence electrons f…
  • . Below is the tabulated molecular weight data for a polytetrafluoroethylene [-(C2F4)-]n material. Compute for (a) the number-average molecular weight, (b) the weight- average molecular weight, and …
  • HO HO Are any of the products of combustion lethal when inhaled? Which ones? Why? 0-HO 18 18 What is the greenhouse effect? Should we be concerned about it? Why? The green Role the temperature of the …
  • Now that we have studied how to handle chemical materials safely please take a moment and watch this video. https://youtu.be/N0X4EKETNkc  Is there any way you could safely demonstrate any of the…
  • . What is the wavelength of light that is emitted when an excited electron in the hydrogen atom falls from the n = 5 level to the n = 2 level? A. 5.12 x 10-7 m B. 4.34 x 10-7 m C. 6.50 x 10-7 m D. 5…
  • Use the information from the trials to figure the questions out because I’m absolutely stumpedÂ. Trial 1 0.004 @ 225 seconds 1.9 mL of H20 0. 8 ML of JOM HCI Trial 2 0. 8 ML of 2. 724 M of acerone 0….
  • In each case a member of the green should give the name of reaction. Explain why if there is no reaction. Explain how the structure of the starting material affects the outcome of the reaction. 18 d) …
  • Solve the following problems. You may use a separate sheet of paper for your solutions. 1 . How much energy is required to change 2600 gram of water at l00°C into steam at the same temperature? 3H,,?…
  • . What is the Hartree-product wave function for 2 non-interacting quantum mechanical harmonic oscillators (QMHOs) of reduced mass 1 a.u. in a potential having a force constant of 1 a.u., where the f…
  • Please explain why “a” is no reaction. To Ploubond tonite bris mojam adj animelob of aliA e"oslinvoshaM ear of 15dmarsil 2. Consider the following reactions. In each case a member of the group sh…
  • Â. Based on the LDSD values of the fuels you just looked up, come up with a hypothesis for the outcome of the ecotoxicity experiment, connecting LDSD with toxicity.
  • . Write your answers in a solution paper. 1. How many moles of magnesium is 3.50 x 1022 atoms of manganese? 2. How many molecules are there in 6.00 moles of glucose, CH1206? 3. How many moles are 1….
  • I am trying to figure out how to make this graph for my f(x) of 5.635574x+0.014047 and R^2=1 for the same lab just different values
  • Module 1 Lab : Molar Heat of Neutralization Data Record the following data that you collected from the lab during the virtual investigation: initial temperature of 1.0 mol/L H2504(aq) 24. 5 . C initia…
  • Use the information from the trials to figure this out because I can’tÂ. The following questions pertain to the lodination of Acetone experiment. Write out your experimentally determined rate law. In…
  • Graph the heating curve of ethanol using the information given. Check off each box as you add additional information to your graph so that none is missed Background Information on Ethanol : Boiling po…
  • All Mixed Up! Ag2S HCN H3PO3 Zn(C2H302)2 NH NO3 CS2 Hg2 Br2 Ca(MnO4)2 NH 3 SAN4 Li202 HFO3 I2Cl6 CIF 5 HF Cd(OH)2 HBrO3 ICI CrPO4 CuHSO3 H202 HFO
  • please solve a and B! Thank you! Will give good feedback!. 4. Consider the following molecules: CBr4 H2CO a. Draw Lewis diagrams for each molecule. (1 point) b. Use VESPR to predict the geometry of ea…
  • please solve A and B! Thank you, will give good feedback!. 2. Create a visual representation of ionic substances to connect the microscopic structure of ionic substances to each of the following macro…
  • Need help with finding average heat for Trials 1 and 2 only. as well as calculating the % error. My sig figs might be off. I used aluminum.. Data and Calculations Trial 1 Trial 2 Trial 3 Mass dry calo…
  • Can anyone help me answer these questions? Some require drawings.. General Chemistry II NAME Lewis Structure Worksheet Complete the following for the molecule indicated. Molecule: NS, 4) Use e" t…
  • Calculate the atmospheric pressure at the top of Mount Everest (8.85 km, -36 C). What are the concentrations (mol/L) of dioxygen at this altitude? Are the concentrations higher or lower than surface c…
  • The chemistry of proteins in our foods  ÂWere you surprised to learn that the protein in milk is so complicated? Give an example of how a specific protein (or group of proteins…
  • Accept ssibility Comment v Show Comments Changes Reviewing Pane ssibility Language Comments Tracking Changes Chemistry 3302 Chapter 3 Quiz Spring 2022 1. Explain what the following conditions say or d…
  • essibility Language Comments Tracking IS Changes Compare 4. Calculate the value of AS for cooling 340 grams (about 12 oz worth) of water from 50 .C to – 10 .C using a molar heat capacity of 38.0 J K-1…
  • General chem hw help  Need help w the explanation part like step to step for ex problem 7 I still don’t know exaclty how they got the answerÂ. 6. (6 pts.) Perform the following mathematical ope…
  • Enter your answer in the provided box. Â An intermediate step in the industrial production of nitric acid involves the reaction of ammonia with oxygen gas to form nitrogen monoxide and water. How man…
  • List two steps or precautions you had to take during the experiment that might have made a difference in the mole ratio of your product. Explain what the differences might have been.
  • Be sure to answer all parts.  Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen:  4KNO 3 ( s )→2 K 2 O( s ) + 2N 2 ( g ) + 5O 2 ( g )  To produ…
  • Calculate the value ofÂDelta S for cooling 340 grams (about 12 oz worth) of water from 50Â o C to -10 o C using a molar heat capacity of 38.0 J K -1 mol -1 for ice, 76.0 J K -1 mol -1 for water, and…
  • Imagine a bacterial cell (5 um) attached to a 10 um dust particle. If we estimated the settling time over 1 meter to be 3 minutes for the dust particle and 49 seconds for the viral and dust particles …
  • What is the Combined Gas Law? Explain the effect on the final volume if pressure decreases and temperature increases.  4.ÂAt sea level, a scuba diver’s tank can hold 100 liters of air at standa…
  • Just confused as to how I should approach this problem. Also a little confused about what the difference is between “reacted” and “produced.”. 10. Given the following reaction, how many grams of FeSO,…
  • ÂWhen mountain climbers hike up Mount Everest, they carry bottles of oxygen because the pressure decreases. At the top, the pressure can reach as low as 0.20 atm. If they bring 15 L of oxygen, stor…
  • . 4. The vapor pressure of a sample of heavy water (D20) was measured, and the data are summarized below with several plots of the data provided. Based on these data, what is the best value for the …
  • please help me. 1. What are the different types of solution according to the amount of solute dissolved in a solvent? Describe each. (15 points)
  • please help me. TEST II – IDENTIFICATION: Identify the following described term. Write the answer on the space provided. NO ERASURE. 1. They are forces that occur between an ion and a polar molecule. …
  • With the information given from the trials, can someone figure out how to do all of this I’m so lostÂ. Trial 1 0.004 @ 225 seconds 1.9 mL of H20 0. 8 ML of JOM HCI Trial 2 0. 8 ML of 2. 724 M of acer…
  • Can someone help me?. COLUMN A COLUMN B — 1. crystal lattice a. they are composed of covalently bonded molecules attracted to each other by electrostatic forces. 2. ionic solids b. a solution with l…
  • A bullet is fired from a rifle that is held 4.20 m above the ground in a horizontal position. The initial speed of the bullet is 1010 m/s. There is no error in the velocity value. (Use the value of g …
  • A 10.0-g sample of carbon monoxide, a poisonous gas produced by the incomplete combustion of hydrocarbons, occupies 356.6 L at a pressure of 7.0 kPa. What is the pressure occup…
  • Write the objectives IN YOUR OWN WORDS: and summarize the Experimental Procedures(A,B,C,D,E) IN YOUR OWN WORDS in numbers/bullet points:Â. I-ijmtim: Determine the identity of anions in a mixture. Thi…
  • If 35.0 g of hemoglobin is dissolved in enough water to make 1.0 L of solution and the osmotic pressure of the solution is measured to be 10 mmHg: a) What is the concentration of hemoglobin? b) Calcul…
  • . ANAUSAIDONCE IV. REFLECTION/COMMENTS/SUGGESTIONS A. Let’s Reflect What did you learn? What activity did you enjoy the most? What can you do to improve your understanding of the topic/lesson? V. RE…
  • Be sure to answer all parts. Â Hydrogen gas has been suggested as a clean fuel because it produces only water vapor when it burns. If the reaction has a79.4%yield, what mass of hydrogen forms221 kgof…
  • Three identical resistors, when connected in series, transform electrical energy into thermal energy at a rate of 24 W(8.0 W per resistor). Determine the power consumed by the resistors when connected…
  • physical science. Calculate the electronegativity difference and give the type of bond that exists between the atoms in each of the following pairs. (20 points) Molecule EN of the first EN of the 2nd …
  • An intermediate step in the industrial production of nitric acid involves the reaction of ammonia with oxygen gas to form nitrogen monoxide and water. How many grams of nitrogen monoxide can form by t…
  • Need help on Task 1, link here: https://docs.google.com/document/d/1MQ7i39vYn3cnIpY733R1tzSua37mPBkD/edit?usp=sharing&ouid=110332137996866391985&rtpof=true&sd=true
  • you measure the Masses and volumes of two cylinders. the mass of cylinder 1 is 1.35 times the mass of cylinder 2. the volume of cylinder 1 os 0.792 times the volume of cylinder 2. if the density of cy…
  • Pre-Lab Questions 1. You are interested in calculating the molarity of NaOCI in a 4.5 mass % bleach solution. In order to answer this question… a) What additional piece of information is required to…
  • Juce ms 15. Which of the statements about electrons is FALSE? A. Because atoms are neutral, the existence of a negatively charged particle implied there must be a positively charged component of an at…
  • Need help on Task 1, link here: https://docs.google.com/document/d/1QBq63cT6J65Gn9RBsxXpZ0dJZpHje3O2/edit?usp=sharing&ouid=110332137996866391985&rtpof=true&sd=true
  • 8 . How much would the temperature of 275 g of water increase if 36.5 kJ of heat were added?
  • Need help on Task 1, link here: https://docs.google.com/document/d/1xqc1ndmFn1-2RaQU-IuNItpnIl3SW3Bh/edit?usp=sharing&ouid=110332137996866391985&rtpof=true&sd=true
  • . SMILE Sunposted Mextune mended Ay Learning Encounters Learner’s Packet SENIOR HIGH SCHOOL- Practical Research 1 Student’s Name: Grade / Section: Teacher: Date Submitted: I. LEARNING SKILLS A. Most…
  • Equilibrium Constant (Spectrophotometry) What is the colour of light if we’re going to use the wavelength 447 nm? What is the colour of the Fe (SCN) 2+ ion? Are they the same colour? Why do you think …
  • Need help on TASK 1, link here: https://docs.google.com/document/d/1XTCa4N2nb5Jx_8w56PjJbiPQKhJlDxsG/edit?usp=sharing&ouid=110332137996866391985&rtpof=true&sd=true
  • . Water of Hydration Prelalo A student is given a sample of red cobalt sulfate hydrate. She weighed the sample in a dry covered crucible and obtained a mass of 26.148 g for the crucible, cover, and …
  • Hydrochloric acid is neutralized by calcium hydroxide according to the following reaction: Ca(OH)2 (aq) + 2 HCI (aq) > CaCl2(aq) + 2 H2O (1) What is the concentration of a calcium hydroxide solu…
  • What is the concentration of a hydrochloric acid solution if 35.00 mL of it are exactly neutralized by 14.8 mL of a 0.500 M sodium hydroxide solution?
  • . Question 38 (3 points) Saved A mixture of KCI and KCIO weighing 1.72 grams was heated; the dry O2 generated occupied 143 mL at STP. What percent of the original mixture was KC103, which decomposes…
  • Acid spills are often neutralized with sodium carbonate. For example NazCO3 (s) + H2SO4 (aq) > Na2SO4 (aq) + CO2 (9) + H2O (1) An instructor dropped a 2.50 L bottle of 18.0 M H2SO4 on a cement …
  • Subject : STEM Capstone Project  Hi tutor, I’m a graduating senior high school student (STEM Strand) and I want to ask for help. Could you please give me some ideas on what product/output can we hav…
  • Pre-Lab Questions 1. You are interested in calculating the molarity of NaOCl in a 4.5 mass % bleach solution. In order to answer this question… a) What additional piece of information is required to…
  • \ Â. The concept of multiple bonds is used to explain the molecular formula of Select one: O a. BeF3. O b. Nz. O c. CH. O d. H,Oz.
  •       Define specific heat:    2.  Â Write the formula for specific heat: 3.  Â Write the formula for energy (Q): 4.       From question 3, stat…
  • Fill out the tableÂ. Formula! Valence e- 502 (Best Resonance: F.C. : 0) (one of the 2″‘1 Best Resonance) $03 (Best Resonance: F.C. z 0) 6-: 503 (one of the 2′”3 Best Resonance Structure) Lewi…
  • CHEMISTRY 182 Name: Models Laboratory Report Lab Day/Hour: 3-D Sketch 3-D Sketch Net Formula/ Lewis Dot with with Dipole Valence e- Structure Bond Angles Bond Moments Moment N2 e- = NH 3 e- = NH4+ NA …
  • . X y RF A V xn Polarize Figure 17. Pulse sequence for 72 relaxation measurement at earth field.. For the 72 experiment, what is the equation for the signal strength in function of the total echo ti…
  • . For the T1 experiment, what is the equation for the signal strength in function of the time during which a sample is pre—polarized (“Polarize” segment in Figure 13)?. – Figure 13. Spin-echo …
  • There are 2 parts to this question, Thank you in advance!. 11. What is the freezing point of a solution of 5 grams of glycerol (C3H803) in 150 grams of water (Kf water = 1.86 .C/m)? 12. When 9.72 gram…
  • . 11:25 II ‘3’ (i) X Courses X Module 03 Question 34 What is the percent composition of each element in K2Cr207? Use the editor to format your answer Question 35 If there was 14g of molecule A (7g…
  • Question What is the molar mass of a protein, if a solution of 0.0180 g of the protein in 25.0 mL of solution has an osmotic pressure of 0.560 torr at 25.0 . C? . Write the answer with three significa…
  • . Match the following structures to their proper IUPAC name. H H H 1. H -H 2-butene H H 1-butene 2. H,C-CEC-CH3 3. He =CH .CH3 CH2 2-butyne H H H H H 4. H -C C. H propane H H H H H HaC CH3 5. pentan…
  • Consider a 0.246 M aqueous solution of sodium hydroxide, NaOH. How many grams of NaOH are dissolved in 23.09 mL? How many moles of hydroxide ions (OH^-) are found in 23.09 mL? How many moles of sulfur…
  • A man runs at a speed of 10 Km per an hour. Calculate his speed in meters per hour (m/hr) Hint: 1.0 Km = 1000 m A 10 meters an hour B 1000 meters an hour C 10000 meters an hour D 100000 meters an hour
  • . 11:25 I "v: [:31 X Courses X Module 03 Question 28 Identify the molecular geometry for the compound: C52 Question 29 Identify the molecular geometry for the compound: CH30H
  • . 11225 .I 5? (E) X Courses Module 03 Question 26 1 Point For the following compound, determine the number of electron domains: CHCI3 Question 27 For the following compound, determine the number …
  • . 11:24 .. a» :3» X Courses Module 03 During her presentation, Zahara was asked several questions from the audience and to provide the molecular formula for molecules that the audience had questio…
  • . 11:24 X Courses Module 03 Zahara Noor wants to create a presentation of different molecules that helped change the world, but she needs help in naming them, so that anyone is able to understand th…
  • Kinetics of a clock reaction – reaction rates 1, 2, 3,. OBJECTIVES . Explore the effect changing reactant concentration has on reaction rate. . Explore the effect changing the temperature has on rea…
  • What are some features that could result in the entropy of a crystal approaching a value other than zero as the temperature approaches zero Kelvin?
  • . X Courses Module 03 Understanding resonance is a key concept to understanding the different ways a molecule can exist, simultaneously. How many resonance structures does the following molecule hav…
  • . 11:23 X Courses X Module 03 . . . D F Ca F- Question 11 1 Point Dr. Laila Malik has been tasked to help her graduate student with making a ground-breaking molecule, but she has to start with helpi…
  • Determine the osmotic pressure (atm) of a 0.50 L aqueous solution containing 0.21 mol of a non-electrolyte compound at 50. .C? . Use R = 0.08206 L atm mol K in your calculation. . Report your answer w…
  • . Now, provide the following information about your chosen molecule: Describe why the molecule is important and its function within the human body. Use the editor to format your answer Question 8 Dr…
  • . 11222 . ‘5" E} X Courses X Module 03 Module 03 Content Choose one molecule that is vital to the human body. Provide the following information: Name of molecule Water H20 Now, provide the fo…
  • CHM 121 50 3 Student’s name astap Bushco Report Form Experiment III: Properties of Hydrates These two columns involve the observations that help you determine if the residue is water soluble A. Identi…
  • For questions 4.1 – 4.3, and 4.5 use the Equipartition Theorem. Question 4.1. (20 %) a) What is the internal energy <> of 1 mol of Cl2(g) at T= 300 K? You can assume that at this temperature all…
  • Complete the following reactions. If more than one product is formed, indicates which is the major product.. Br d) 2 + Br2 – 19 CH, C-CH,Br (b CH 3 e) CH3 C=CH2 + HCI ? + ? CH3 major minor CH 3 CH 3 H…
  • Please solve for part b and c, ignore part a! AP Chemistry. 3.2.7 Practice: Thermodynamics Practice EC AP Chemistry Sem Name: Young Chan Cho Points Possible: 25 Date: 1. Use each model to predict whet…
  • Calculated Quantities and Results (SHOW ALL SETUPS): Mass of sample of solid hydrate Mass of residue (assume this is pure anhydrous compound) Mass of H20 lost (assume the mass lost on heating is entir…
  • Percent Water in a Hydrate Assumed Information: Vial #:_25 Chemical Formula of Anhydrous Compound (in your hydrate): Co. Sou Raw Data: Mass of crucible and cover us. 87 g Mass of crucible, cover, a…
  • (TCO 7) (a, 5 pts) Given that the molar mass of H;PO. is 97.994 grams, determine the number of grams of H:PO. needed to prepare 0.75L of a 0.25M H:PO. solution. Show your work.
  • (b, 5 pts) What volume, in Liters, of a 0.25 M H:PO. solution can be prepared by diluting 50 mL of a 2.5M H;PO. solution? Show your work (Points : 10)
  • Question 12 0.25 pts (4.4)When the reaction below was carried out with 8.38 grams of Al and excess O2, 13.9 g Al203 was obtained. What is the percent yield? (Hint: Find the theoretical yield and then …
  • Directions: Using GRESA format, Illustrate and solve the following problems in a short bond paper. Express your answer in two decimal places then box your final answer.  1. Determine the magnitude…
  • What are the principles involved in  PREPARATION AND STANDARDIZATION OF HYDROCHLORIC ACID SOLUTION? My professor reiterated that it involves the secondarystandardization. However, the files provided…
  • . Chemistry 112 – EXPERIMENT 1 Prut ev ) vuelmer sili no be 2do esw isdw edrazed Synthesis of an Iron Complex Saltonsled s svia beviorni INTRODUCTION (S qsta) :0;);H ME Jm 02 to noitibbA 1 Many o…
  • Question Which of the following solutions requires the least effort (the lowest pressure exerted externally) to purify by reverse osmosis? Select the correct answer below: 0.2 M sodium chloride soluti…
  • . < > I Y webassign.net C HW #10 – CH 101 (002), section 002, Spring 2022 | WebAssign Homework Help – Q&A from Online Tutors – Course Hero Start Page + Your last submission is used for you…
  • . Question 1 1 pts What is the sum of the coefficients when the following equation is balanced _FeCl3 + __NH4OH –> __Fe(OH)3 + _NH4CI note you must sum the coefficient values for all four compou…
    • Which of the salts is a weak acid, and what is its conjugate base? Which of the salts is a weak base and what is its conjugate acid? In Part 2 you selected a buffer system to study. a. What was the…
  • In Part 3, were you able to achieve your target pl? What were some of the difficulties you had during this part of the lab? The buffer you designed was prepared by using stock solutions of a weak acid…
  • Post-Lab Questions In part 1 you measured the pl of three salt solutions. a. For solutions having pl less than 6 or greater than 8 write a NET ionic equation to explain qualitatively why the solution …
  • Complete the following reaction. CH 3 HCI HBr ? Heat H, O 2/ H , Ot B12 H,/Pt Pressure V
  • Learning ÂObjectives: To apply principles of thermodynamics to determine Â∆H Âand Â∆S Âof different aqueous equilibria. Experimental ÂObjectives:  Measure different components of the fol…
  • . Extension Questions: 1. Calculate the number of moles of bicarbonate and acetic acid (vinegar) in each test tube in the inquiry activity. Using the following information. Assume that the density o…
  • Describe what was observed after each of the following procedures. Explain each observation based on the chemistry involved. Give a balanced chemical equation where possible. 16 to el29ntry2 1. Additi…
  • What is the physical observation when the endpoint has been achieved during titration?
  • Pressure is applied to a sample of ice at -20 “C starting at 1 bar of pressure stopping at 100 bar. The density of water can be taken to be 0.920 Mom3 at this temperature. What is the change in t…
  • Addition of 17 mL 6% H20z (step 8) 3. Addition of 13 ml 1M HzCO. (step 9) 4. Filtration of the solution, if necessary (step 9) 5. Addition of 20mL 95% ethyl alcohol (step 10)
  • Consider the following reaction. Mg(s) + 2 HCl(g) → MgCl2(s) + H2(g) [Balanced] When 2.08 g of magnesium is reacted with excess HCl gas, the mass of magnesium chloride (MgCl2) produced was 7.54 g….
  • . Procedure: Lets look at a series of half dilutions. With the virtual lab, fill 5 flasks with a constant amount of water (less than half the volume of the flask). For simplicity, we will use 20 …
  • Title of the experiments: PROPERTIES OF LIQUID AND RELATION TO INTERMOLECULAR FORCES I have these 3 experiments. You’ll not do it, I just need you to make an generalization of introduction, objectives…
  • Title of the experiments: PROPERTIES OF LIQUID AND RELATION TO INTERMOLECULAR FORCES I have these 3 experiments. You’ll not do it, I just need you to make an overall introduction, objectives, and conc…
  • I dont know what to do in this one 👆 Please answer questions  1. Define sublimation.  2. What do you think would happen if the water in the shallow container was at room temperature? If i…
  • What is the concentration of HCI in the final solution when 66.27 ml of a 10.9 M HCI solution is diluted with pure water to a total volume of 0.82 L? Enter your answer to 1 decimal place without units…
  • 1 pts A 27.73 ml sample of phosphoric acid of unknown concentration was titrated with a 0.147 M NaOH(aq). The equivalence point (end point) in the titration was reached when 41.64 ml of the sodium hyd…
  • What is the concentration of AS(III) in a sample of water if the peak current under SCE is 1.37A ?
  • Formulas: KE=1/2mv 2 , GPE=mgh, 1/2mv i 2  + mgh i = 1/2mv f 2  + mgh f  1) A 5kg object and a 10kg object are dropped off of a cliff. Just before the objects strike the ground, which obje…
  • . Prediction: We predict that the balloon with the most sodium bicarbonate will inflate the most because it has the greatest amount of mass to react. Balloon # 2 3 4 5 6 Diameter of 35 mm 45 m…
  • Use table to answer question 11. Use the following to answer the next 3 questions. The smelting of iron occurs in a blast furnace, as represented by the following overall equation. Step I 3Fe203(s) + …
  • Write a report to the FBI in which you explain whether or not the jars were most likely left by the unknown criminal or a copy-cat criminal. It is very important that you use your experimental results…
  • ed for this question. An aqueous solution of hydrobromic acid is standardized by titration with a 0.187 M solution of calcium hydroxide. If 16.3 ml of base are required to neutralize 14.9 ml of the ac…
  • 21 Part 3 of 3 22 7.97 g of naphthalene (CH ) in 85.2 ml of benzene solution. 23 M 24 X 5 25
    • 1 2 F 4 5 6 You have 505 mL of a 0.175 M HCI solution and you want to dilute it to exactly 0.100 M. How much water should you add? Round your answer to 3 significant digits.
  • Which metal could be used to leach copper, Cu, out of copper(II) sulfate, CuSO 4 ?
  • An aqueous solution of calcium hydroxide is standardized by titration with a 0.143 M solution of hydrochloric acid. If 23.1 ml of base are required to neutralize 17.7 ml of the acid, what is the molar…
  • Which contains the greatest number of moles of atoms? 75.0 g of indium (In) or 80.0 g of tellurium (Te)
  • Calculate the molarity of each of the following solutions. Round each of your answers to 3 significant digits. Part 1 of 3 6.76 g of methanol (CH, OH) in 1.50 x 10 mL of solution. M X Part 2 of 3 9.30…
  • . C. Directions: Complete the table between an amorphous and crystalline solid write your answer in your notebook. Criteria Amorphous Crystalline Shape Melting point Compressibility Breakability
  • N 5. How many atoms of carbon are in 2.30 moles of carbon? What conversion factor do you need for this part of the problem?
  • What volume of 0.174 m hydrobromic acid solution is required to neutralize 16.3ml of 0.187m sodium hydroxide solution?. [Review Topics] [References] Use the References to access important values if ne…
  • Figure 1 1. Use the data in the graph Âto determine the solubility of potassium bromide (KBr) and sodium nitrate (NaNO 3 ) at 0, 20, 40, 60, 80, and 100°C. Record the solubility for KBr in Table 1 a…
  • . A. Directions. Complete the diagram below by checking the type of intermolecular forces from the given substances. London Polar/Non lon-dipole Dipole- Hydrogen Substance polar Forces Dispersion Fo…
  • . 11. Le sang est un exemple de solution tampon. Les substances qu’il contient peuvent neutraliser un leger surplus d’acide ou de base, ce qui maintient son pH a peu pres constant, soit entre 7,35 e…
  • . B. Directions: Read the questions and write your answer on your notebook. J 1. At 50 ° C the vapor pressure of ethanol is 0.30 atm, acetic acid is 0.08 atm, water is 0.12 atm, and acetone is 0.84…
  • Complete the following chemical reaction equation, including states of matter and balancing: FeCl 3(aq)  + Zn (s)  ®
  • Show work (proper dimensional analysis) for full credit. Put a box around your final answer. Do not forget correct significant figures, rounding and units! 4. How many grams of carbon are in 2.30 mole…
  • Which term below best describes the study of how energy is transferred to different locations and forms? A. Enthalpy B. Thermodynamics C. Chemical reactions D. Entropy
  • what is the temperature after a sample of Xe that is originally at 42.5 degrees C and 811.4 mmHg and is now increased to 1545 mmHg?
  • Suppose the initial concentrations of H2S, H2, and S2 are 1.00 M, 0 M, and 0 M, respectively: 2 H2S(g) ï‚« 2 H2(g) + S2(g) with Kc = 1.00 x 10^-6 Â What would be the equilibrium composition at the te…
  • Fill in the missing information: atom or ion? number of | number of symbol check all that apply protons electrons Ge O neutral atom O cation Oanion V neutral atom O cation O anion 12 neutral atom O ca…
  • Find the molality of a solution in which 52.78 g of LiOH are dissolved in 4873 g of water
  • How much water is required if 74.5 g LiF need to be used to prepare a 1.36 M solution?
  • Measurement of thickness of Aluminium foil   Length of aluminum foil L(cm) Width of aluminium foil W(cm) Mass of aluminium foil (g) Density of aluminium foil (2.70 g/cm3) Vol…
  • Describe this model of the hydrogen atom. What The electron does a bounce like motion around is the atom like? How does it include waves? the proton. The neutron is located inside the proton. The elec…
  • . Directions: Write TRUE if the statement is correct, FALSE if it is incorrect. 1. Research starts with inquiry. 2. Research is mere information gathering. 3. All efforts of improvement are research…
  • Please answer questions (Analysis and conclusion) in Sublimation hands on. Â. Act. 3.7 Activity Title: SUBLIMATION Activity Type: HANDS-ON CHEMISTRY Standards: To observe the sublimation of air fre…
  • Calculate theÂΔH f o for ethane C 2 H 6 using heats of formation and the following equation (-81.1 kJ) 2 C 2 H 6(g)  + 7 O 2(g)  🡪 4 CO 2(g)  + 6 H 2 O (l) ΔH o = -3126.6 kJ/2 mol …
  • Find the order of KIO3 and Na2SO3 (x and y) by firstly creating another data table with the rates and concentrations with the data provided. Then find K.. VII. Results Flask 0.0IM 1 / vol of 1 M Water…
  • Can someone solve this, I don’t understand.. Record your observations here: Color of bromine in each tube: Color of the hexane after the reaction: Color of the hexene after the reaction: Use the Chemi…
  • . Write all of the mole—mole factors for each of the following chemical equations: a. 2A] (a) —|— 3012 (g) —> 2A1013 (a) b. 4H0] (g) + 02 (g) —> 2012 (g) + 2H20 (9)
  • . Which statement regarding intermolecular forces is FALSE? " 0 Sodium acetate, CH3COO’Na+, a crystalline solid at room temperature, has strong intermolecular hydrogen bonds. 0 Solvents can w…
  • Show how to derived dH = V dp + T dS starting from the definitions of U = q + w and H = U + pV by taking infinitesimals of each term. Hint: it may be useful to make some assumptions such as reversible…
  • Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. Write the net ionic equation for the following molecular equation. 3Ag2504(aq) + 2Na3P04(aq) ->2Ag3P04(S) + 3Na…
  • Pressure is applied to a sample of ice at -20 C starting at 1 bar of pressure stopping at 100 bar. The density of water can be taken to be 0.920 g/cm3 at this temperature. What is the change in the mo…
  • Find the order of KIO3 and Na2SO3 (x and y) and find K. Use the method in which you put one equation over the flask over another until you find x and y.. Flask [KIO 3_ Naz SOaJ r = t A 1. 7 x 10-4 4. …
  • . REPORT SUMMARY Record your observations for the reaction of each element with water in the table provided below. Observations after mixing with water- Element phenolphthalein mixture Mg no change …
  • List three atoms or ions that have the same number of electrons as each of the following: (a) Sz- (b) A/3+ (c) P3- (d) Kr (e) Cs+ 6. Suppose that a new element has been made. Chemical tests show th…
  • Fill in the missing information: symbol atom or ion? number of number of check all that apply protons electrons O neutral atom cation anion 17 18 X O neutral atom cation anion 5 2 neutral atom cation …
  • CHECK YOUR LEARNING 1. Compare a sodium ion to (a) a sodium atom (b) a neon atom wu 2. (a) Draw the Bohr-Rutherford diagram (without neutrons) for an atom of each of the following elements: lithium, o…
  • A neutral atom has the following electron configuration: [Ho] 2522 p3 What is the chemical symbol for the atom? I]
  • Aluminum:21.606 g Vol Di water: 100 mL HCL: vol 2o mL  1. On a separate sheet record your calculations for Cp(Al). (see p. 465-466 in your text). Compute the percent error. The true value is li…
  • I am still seeing in other places the answer to the question is: The number of data points being evaluated. ÂI feel like this is a better explanation as Grubb’s doesn’t anything about it in the degre…
  • Use the References to access important values if needed for this question. 1A 8A H 2A 3A 4A 5A 6A 7A He Li Be IN F Ne Na Mp 38 48 58 68 78 8B 18 2B S P S CI Ar K Ca SC Ti Cr Mn Fe Co Ni Cuz…
  • ​____LiOH + ____KCl —>____LiCl + ____KOH ​a) I began this reaction with 20 grams of lithium hydroxide. What is my theoretical yield of lithium chloride? ​b) After carrying out the experimen…
  • [References] a. For atomic number 11, write the name and chemical symbol of the corresponding element. Name: Symbol: b. For atomic number 22, write the name and chemical symbol of the corre…
  • (References] a. For the negative ion NOs , use the concept that a chemical compound must have a net charge of zero to predict the formulas of the simple compounds that the negative ions wou…
  • Activity.do/locator=assignment-take 1) [References] On the basis of the element’s location in the periodic table, indicate what simple ion each of the following elements is most likely to f…
  • Group submission Lab Date: Feb23 Due Date. tch 25 Problem: do this What mass of precipitate is formed when 1.0 g of copper (II) sulfate – water(1/5) in solution reacts with an excess amount of sodium …
  • Pressure is applied to a sample of ice at -20 “C starting at 1 bar of pressure stopping at 100 bar. The density of water can be taken to be 0.920 g.H’cm3 at this temperature. What is the change i…
  • 1A BA H 2A 3A 4A 5A 6A 7A He Li Be B N F Ne Na Me 3B 48 5B 68 78 8B 1B 28 S S CI Ar K Ca SC Mn re Co Ni CU Zn Go GelAs So Br Kr Rb Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te Ke Ba La HT Ta Re Os| …
  • Please answer question in Sublimation hands on. If possible please provide pictures of the (process and procedure) experiment sublimation, It will be greatly appreciated Â. Act. 3.7 Activity Title: S…
  • Suppose that in Part II, Step 3, a student did not completely dissolve the urea sample. a. Will the freezing point depression, AT,, of the solution be larger or smaller than it would have been if t…
  • H 2A 3A 4A 5A 6A 7A He Li Be C N I F Ne Na Mg 38 48 58 6B 78 8B 1B 2B SI S C Ar K Cal Sc Ti Cr Mn Fe Co Ni CU Zn Ga Ge As Se Br Kr Rb Sr Zr Nb Mo Tc Ru Rh |Pd Ag Cd| In Sn Sb Te Ke Cs Ba La…
  • need help figuring out mass percent. Â. A solution is 4.5% NaOH. If the solution has a mass of 648 g, how many grams of NaOH are in the solution?
  • Help with the first 2. ab Data X (Delore mixing) (Aller mixing) (select all ulat apply) clear boiling with bubbles, some No reaction occurred heat Double displacement Endothermic Exothermic Fe(s) + H2…
  • 1A 8A H 2A 3A 4A 5A 6A 7A He Li Be B N F Ne Na Mg 3B 48 58 6B 78 1 8B 18 2B S S CI Ar K Ca SC MIL re CO Ni Cuzn Ga Ge As Se Br Kr Rb ST Nb Moj Ic Au Rh Pd Hg Sn Sb Te Ke LS Ba La Re US Pt A…
  • On a separate sheet record your calculations for Cp(Al). (see p. 465-466 in your text). Compute the percent error. The true value is listed in Table 10.3. If you have more than 10% error, consult w…
    • The enthalpy of solution of sodium hydroxide is -44.5 kJ/mol. If 10.0 g of sodium hydroxide were dissolved in 75.0 mL of water at 21.1 degree Celsius, what would be the maximum temperature attained…
  • . Practice Task 3: Find that Word! Directions: From the pool of words, encircle the words that are related to research investigation phenomena intuition acts discovery interview experiences guessing…
  • Need help figuring out mass percent. Â. A solution has 19.8 g of solid NH4OH dissolved into 285 g of water. What percent of the resulting solution is NHAOH? Answer as a percent.
  • tuation persecond. Fill your slope in the table below Trial [S2Os ], M , M Rate (mol/s) 1 0.05 0.05 2 0.10 0.05 0.05 0.10 4 0.10 0.025
  • The mass flow rate of the juice product (specific heat = 3.8ÂkJ/(kg °C)) during pasteurization in an indirect heat exchanger utilizing hot water as the heating medium is 1000 kg/h, which enters the …
  • a minimum 750-word letter of intent for a grant. A letter of intent is sent out to grant institutions to show them you have an interest in doing this particular work and to determine their interest in…
  • Please Let me know If you need any Further references I’m pretty stuck with this. PLease show the work as well.. Fill in the missing chemical formulae in the tables below. conj ugate base. Fill in the…
  • Calculate the order of KIO3 and Na2SO3 (x and y). Then calculate K.
  • I need help figuring out mass percent. Â. A solution has 19.8 g of solid NH4OH dissolved into 285 g of water. What percent of the resulting solution is NHAOH? Answer as a percent.
  • What are the similarities and diferences between miscibility and solubility? Â2. What are the differences and similarities between molarity and molality? What are the disadvantages and advantage s…
  • En una solucion de un compuesto paramagnetico dentro de un campo magnetico externo. Escribe la ecuacion que relaciona la susceptibili magnetica, con la frecuencia del campo externo (Hz) y la concen…
  • Write the formula for these compounds. O Name the following compound, iron(II) chlorite O Name the following compound, iron(II) chlorite O Name the following compound, manganese(IV) nitrite O Name the…
  • Calculate how many grams of NH3 form when 4.88 Kg N2H4 quantity of reactant completely reacts in: Please show your work. 3N2H4(l) ——————- 4NH3(g) + N2(g)
  • Does ammonium nitrate+sodium hydroxide produce a precipitate reaction/what are the states of matter of the products?
  • Does ammonium nitrate+sodium hydroxide form a precipitate reaction and what are the states of matter for the products?
  • How many grams of Cu(NO3)2 are needed to create a 5.87M solution if you need 2.03 liters?
  • How many grams of NaCl should be added to 4.78 kg of water if a 6.48m solution is needed?
  • When molecules are shown with Lewis structures, a single covalent bond is drawn as a
  • . Four electrons shared between two atoms is known as O a quadruple bond 0 a triple bond 0 a double bond 0 none of the above
  • Same with this, also solution 4 and 40 mL as well please. Red Dye Standard Working Solution Concentration % T Absorbance Solution Volume (mL) 1 5 2 10 3 20
  • How do I do this? 1. 2.  Â. In 201 1, the world’s nations produced about 38 billion tons of C02. The rise of atmospheric carbon dioxide has significant effects on not only global warming, …
  • How do I do this? 1. 2. 3. Â. A researcher needs to create 100 mL of a buffer solution that can maintain a pH of 10.0 at 25 °C. a) First, which weak acid! conjugate base pair is preferable f…
  • same with red dye previously. Sample data and calculations works. Green Dye Standard Working Solution Concentration % T Absorbance Solution Volume (mL) 1 5 2 10 20
  • If the wavelength emitted by light is 693 nm, what is the frequency of this light?
  • Looking for typical data for these if anyone has anyone that’s in the ballpark of it and also how to calculate everything that would be great. Part A: Working Solution Preparation and Absorbance Data …
  • Calculations explanations please. Unknowns Each student will do one dye Unknown ID Wavelength (nm) Concentration % T 524 628 524
  • . Question 4 1 pts 1. The specific heat of a metal is determined by heating the weighed metal, adding it to water in a calorimeter, and measuring the temperature change. The specific heat of water i…
  • i need help figuring out parts per billions.Â. A river sample of mass 70,269 g is found to be contaminated with 0.092 g of sulfates. What is this concentration of nitrates in parts per billion, ppb?
  • In the ocean, when two waves collide, the resulting wave could be: a. either larger or nothing b. larger c. of zero amplitude d. larger and higher  which is the correct choice?
  • What is the molality of a solution in which 30.5 grams of MgS are dissolved in 0.532 kg ethanol?
  • . Table 5. Concentration of Reactants Calibration of Droppers Solution Drops in 1 mL Volume per drop (mL) 0.01 M HIO 3 20 0.05 0.01 M H2SO3 20 0.05 H20 28 0.04 Test 0.01 M HIO 3 Volume 0.01 M Moles …
  • Why is it important that haploid gametes be produced in animals? 2. Describe the cell cycle and explain the approximate percentage of time the cell is in each phase? 3.are haploid cells formed duri…
  • What mass of benzene is needed to create a 4.55m solution with 532.5g of Br2?
  • what is are the effects of impurities on the boiling point of a compound
  • How do you quantify hazards/toxicity? Green chemistry is a field of decision making based on the trade-offs of environmental impacts, safety, efficiency, and opportunity cost. In the following expe…
  • CHMY 141 LAB.. try 141 / Experimental Chemist Data Analysis 1. How do you know when to name something as an ionic compound? 2. How do you know when to name something as a molecular compound? 3. How do…
  • CHMY141 Part 3/3. mistry 141 Experimental Chemistry PART II. NAMING MOLECULAR COMPOUNDS Fill in the missing blanks for either name or formula for the following molecular compounds. Number Name Formula…
  • CHMY141 Part 2/3. PART III. NAMING ALL COMPOUNDS The following list of names and formulas is a mix of both ionic and molecular com- pounds. Apply the appropriate nomenclature rules and determine eithe…
  • Part 1/3 Chemistry. PART I. NAMING IONIC COMPOUNDS Fill in the blanks for the following ionic compounds in the table. Anion Formula and Compound Formula Cation Formula and Number Compound Name Name Na…
  • A chemist is studying the following equilibirum, which has the given equilibrium constant at a certain temperature: +N2 g ÂÂ2H2O g  ⇌ +Â2NO g ÂÂ2H2 g = Kp ×7.10−9 He fills a reaction vesse…
  • Don’t answer “Think about This” Answer 3.6 (Sublimation only) Please answer question in Sublimation hands on. If possible please provide pictures of the (process and procedure) experiment sub…
  • Question 1 ÂA and B Question 2 C and D Question 3. Part A MISSED THIS? Read Section 18.8. You can click on the Review link to access the section in your e Text. Use standard free energies of formatio…
  • <Question 30 of 39 A sample of an ideal gas has a volume of 3.10 L at 14.80 C and 1.70 atm. What is the volume of the gas at 20.20 "C and 0.993 atm? V= L
  • Question 29 of 39 > A sample of an ideal gas has a volume of 2.29 L at 286 K and 1.13 atm. Calculate the pressure when the volume is 1.58 L and the temperature is 298 K. P = atm
  • Question 28 of 39 A sealed container holding 0.0255 L of an ideal gas at 0.991 atm and 73 .C is placed into a refrigerator and cooled to 37 ‘C with no change in volume. Calculate the final pressure of…
    • Show your work for the following calculations using your Trial 1 data only: Heat absorbed by mixture, in J Heat released by reaction, in J AH in J/g of metal used
  • Question 26 of 39 A 169.7 mL sample of carbon dioxide was heated to 343 K. If the volume of the carbon dioxide sample at 343 K is 419.0 mL, what was its temperature at 169.7 mL? T = K
  • How much heat is required to raise the temperature of 44.1 g of water from -25 .C to 115 .C? heat: kcal TOOLS x10
  • A metal object with mass of 23.3 g is heated to 97.0 "C and then transferred to an insulated container containing 88.5 g of water at 20.5 "C. The water temperature rises and the temperature …
  • Name the following compound, iron (II) chlorite O Name the following compound, iron (II) chlorite O Name the following compound, manganese(IV) nitrite O Name the following compound, tungsten (II) ac…
  • . The vapor pressure of a sample of heavy water (D20) was measured, and the data are summarized below with several plots of the data provided. Based on these data, what is the best value for the ent…
  • Part III: van’t Hoff Factor of an Unknown Electrolyte TABLE 2.2 Unknown Electrolytic Solution 2 AT,IOC lexpt Trial Unknown Molality 1 0 . 200 m 2 0. 200 m 0 .2 Average 5. Show a sample calculation for…
  • . Show how to derived dH = V dp + T dS starting from the definitions of U = q + w and H = U + pV by taking infinitesimals of each term. Hint: it may be useful to make some assumptions such as revers…
  • Question #6 Suppose NaOH standardization by KHP determined that a volume of 25.00 mL NaOH has a concentration of 0.049 M. Suppose 22.20 mL of KHP was used to get to the endpoint in this standardizatio…
  • 1 The Affect of Metal Degradation Based on Acid Type Four acids are put into varying test tubes and magnesium metal [ Mg ] is dropped into each test tube and the time it takes for the metal to co…
  • What would happen if a homopolymer of histidine (polyhistidine) adopts an alpha-helix structure at pH 9 but is unfolded at a pH of 4.
  • Acetic acid K a = 1.76 x10 -5 Tris∙HCl K a = 8.32 x10 -9 Calculate the pH of a solution of 0.10 M acetic acid.  2. Calculate the pH of a buffer prepared with 0.10 M acetic acid 0.10 M acetate t…
  • Calculate the molar mass of magnesium. Magnesium reacts with hydrochloric acid according to the balanced chemical equation below. Mg(s) + 2 HCI(aq)-›MgCl2(aq) + H2 (g)  I need to use the approach …
  • . Problem 9+ Franck-Condon principle states that transitions between electronic states correspond to vertical lines on an energy versus internuclear distance diagram (see image below). Franck-Condon…
  • The following measurements of the mass of an aspirin tablet were made by different students in a lab. Each set gives the results of three measurements followed by the average. Which set is the most ac…
  • Given all the following information  Dilution Lab Given the following information from the beginning:  A. Stock Solution 1  [S1]:  25 mL of 1.65 % (w/v) copper (II) sulfate pentahydrate (Formu…
  • How many grams of CuSO4 * 5H20 are needed to prepare a 1.16 m solution if 512 g of water are used?
  • Please answer ASAP- I am stuck on a test question. Â Â Â Â Â Â Â Â. Moving to another question will save this response. Question 3 Match the following (fictional) reactions with the correct re…
  • POSSIBLE P Two copper spheres are currently 1.2 meters apart. One sphere has a charge of +2.2 x 10 C and the other has a charge of -8.9 x 10 C. What is the force between the charged spheres? Is the fo…
    • What are the anodic and cathodic Tafel slopes for the magnetite-coated electrode at 30 °C? Use the high-field approximation equation for an anodic current and any point on the anodic leg of the…
  • B The image shows the reaction of element A (purple spheres) with element B (brown spheres). What are the coefficients in front of A, B and Al3 when the reaction is balanced. Balance the equation, the…
  • What are the anodic and cathodic Tafel slopes for the magnetite-coated electrode at 30 °C? Use the high-field approximation equation for an anodic current and any point on the anodic leg of the polar…
  • Hydrogen gas reactions with nitrogen to form ammonia according to the following chemical equation: H2(g) + N2(g) –> NH3(g) How many grams of H2 are needed to produce 12.15 grams of NH? (express yo…
  • A student measured 175mL of 0.250M HCI solution into a beaker. How many moles of HCI were in the beaker? (Enter only your numeric answers, enter 3 significant digits and do not use scientific notation…
  • Communicate the enthalpy change of combustion of butane using molar enthalpy of reaction. 2. Communicate the enthalpy change of butane combustion using Enthalpy Change AH, beside the chemical react…
  • What is the percent composition of each element in C 3 H 8 O 2 ?
  • Use the following information to answer the question 5. Camp stove can burn a variety of fuels such as fuels such as white gas, kerosene diesel, naphtha, and gasoline. 5. Design an experiment that wou…
  • . "Synthesis gas" is a mixture of carbon monoxide and water vapor. At high temperature synthesis gas will form carbon dioxide and hydrogen, and in fact this reaction is one of the ways hyd…
  • For each of the following acid-base reactions, calculate how many grams of each acid are necessary to completely react with and neutralize 2.0 g of the base.  Part B: 2HNO3(aq)+Ca(OH)2(aq)→2H2O(l)…
  • Please answer all the questions. use the tables below for each part.. PART A. Reproduce Table 2 on page 30. (15 pts) 1. Which of the alcohols studied has the strongest intermolecular forces of attract…
  • In the laboratory a student combines 27.9 ml of a 0.242 M iron (III) acetate solution with 19.2 ml of a 0.671 M iron (III) fluoride solution. What is the final concentration of iron(III) cation?. lear…
  • Ethyl Butyrate CH1202 is an artificial fruit flavor commonly used in the food industry for such flavors as orange and pineapple. Its fragrance and taste are often associated with fresh orange juice, a…
  • Part I: Introduce yourself to your classmates with your name, location, current employment, and future goals. Provide a photo of yourself, if you feel comfortable. Not required. But it is nice to put …
    • Elabore fichas tecnicas para cada uno de los reactivos utilizados
  • CHEMISTRY 121L I NAME: LABORATORY QUIZ 1 Please Print 2021 SPRING SEMESTER – 20 POINTS Show your set-up and work to receive credit. The points per question are in bra Where necessary, mind your signif…
  • QUESTION 5 In a thermochemical process, the magnitude of the heat change of the system is the same as that of the surroundings. O True O False
  • It is chemistry molecular and transformation. In some cases, we can combine information from standard heats of formation and bond dissociation energies to learn about the energetics of reactions that …
  • Calculate the molar solubility in moles per liter (Molarity) of silver arsenate, Ag 3 AsO 4 , given that its K sp is 1.0×10 -22 . 2. Calculate the molar solubility in moles per liter (Molarity) o…
  • what is the molarity of a solution made by dissolving 188g of MgCl2 in 500g of water?
  • 5A investigation. QUESTION 25 Current Weather Studies 05 Question 04 O +16 O +7 O -6 O -14
  • Recall:Â [H 3 O + ][OH – ] = 1 x 10 -14Â pH = – log[H3O + ]Â pOH = – log[OH – ]Â pH + pOH = 14Â Milk of magnesia is a suspension of solid magnesium hydroxide, Mg(OH) 2 , in its saturated aqueous …
  • . Performance Task No. 1: Periodic Trends Instructions Identify the specific trends observed in the following set of elements. An example is given below (40 points – 10 points per item): Example: Ch…
  • 0 I A tetrahedron has four faces numbered 1 to 4. If you roll a tetrahedron, the value of the roll is the number on the bottom face. Suppose you roll two tetrahedrons. Each possible outcome is a mi…
  • TOPIC ACID AND BASE This is an important chapter for anyone in or considering a nursing career. 1. Identify the acid, base, conjugate acid, and conjugate base in the following reaction: HPO 4 2- Â + …
  • Write the molecular, total ionic, and net ionic equations for the following reaction Aqueous Copper (II) Sulfate and Aqueous Silver(I) Nitrate Molecular: Total Ionic: Net Ionic: 2. Balance the foll…
  • Example 12.4 , The density of a 2.45 M aqueous solution of methanol (CH, OH) is 0.976 g/mL. What is the molality of the solution? The molar mass of methanol is 32.04 g. i z moles of solute mass of sol…
  • n this lab we are going to try and determine the molar mass of butane (C 4H 10), experimentally. A imple calculation using the periodic table would give us the correct answer for the molar mass , but …
  • Consider the equilibrium below.  H 2 S (g) + I 2 (s) ⇌ 2 HI (g) + S (s)     ÂK p = 1.34 x 10 -5 @ 60 °C  P(H2S) initial = 0.010 atm P(HI) initial = 0.00010 atm  20. What is the value…
  • Methanol (CH 3 OH) is manufactured by reaction of carbon monoxide with hydrogen in the presence of a ZnO / Cr 2 O 3 catalyst:  CO (g) + 2 H 3 (g) ⇌ CH 3 OH (g)    ÂΔH 0 = -91 kJ  How doe…
  • Table #1 – Experimental Observations & Data Trial Initial Final Temperatur Volume Atmospher Experiment # Mass of Mass of e of of Gas ic al Molar Butane Butane (L) Pressure Mass Canister Canist (K …
  • calculate the molar heat of reaction for the NaOH (aq) using the datat obtained from the experiment. Show all your work using GRASP
  • In measuring serum glucoseÂusingÂa linear method (up to 500Âmg/dL).ÂtheÂabsorbanceÂofÂtheÂstandardÂused (200 mg/ÂdL)Âwas 0.444 . The patientÂsampleÂabsorbanceÂunderÂthe same conditio…
  • The question below is based on the neutralization of Sulfuric acid by Limestone. I’m not sure if eq (3) has the right stoichiometry coefficient. Once you figure out the intermediates, it will come o…
  • Use the van der Waals equation of state to calculate the pressure of 2.70 mol of Xe at 473 K in a 5.50-L vessel. Van der Waals constants can be found below. P= atm Use the ideal gas equation to calcul…
  • You are given a compound with the formula MCl3, in which M is a metal. You are told that the metal ion has 22 electrons. What is the identity of the metal? .a)Ca .b)Ti .c)Mn D). Fe E) cu
  • Watch the video below and write what you learn from this video. The Race to Invent the Periodic Table https://youtu.be/-ojcm3IIf98
  • For each of the following equilibria below, write the equilibrium constant expression for Kc . 1. 2 NO (g) + Cl2 (g) ⇌ 2 ClNO (g)  2. N2 (g) + O2 (g) ⇌ 2 NO (g)  3. CH4 (g) + H2O (g) ⇌ CO (g…
  • Write a net ionic equation for the overall reaction hat occurs when aqueous solutions of phosphoric acid and sodium hydroxide are combined. Assume excess base.. Be sure to specify states such as (aq) …
  • Trends in the Periodic Table of Elements   ÂI ÂII   Â. Performance Task No. 1: Periodic Trends Instructions Identify the specific trends observed in the following set of elements. An exampl…
  • I need help with my chemistry assignment. the link in question is this https://www.dummies.com/article/academics-the-arts/science/chemistry/how-to-name-branched-alkanes-in-chemistry-143029 Â. POD (2/…
  • . CHAPTER 13 Exercises Even-numbered exercises are answered in Appendix B. a. CH,CH,CH, – OH Exercises with an asterisk (*) are more challenging. The Nomenclature of Alcohols and Phenols CH,CH,CH,-O…
  • The graph (below) shows the distribution of molecular velocities. How many of the statements are true? . At a given temperature, curve A represents gas particles with the smallest molar mass . For a g…
  • Calculate the root-mean-square speed of methane, CH4 (g), at 78 .C. (a) 23 m/s (b) 350 m/s (c) 550 m/s (d) 667 m/s (e) 739 m/s
  • Please correctly answer. Carbon dioxide gas can be captured and used to produce methanoic acid, as represented by the following equation. Equation I CO2(@) + Hz(g) – HCOOH(1) AH = ? The methanoic acid…
  • Zahara Noor wants to create a presentation of different molecules that helped change the world, but she needs help in naming them, so that anyone is able to understand the molecules that she is talkin…
  • Next / How many grams of phosphine (PH 3) can form when 37.5 g of phosphorus and 83.0 L of hydrogen gas react at STP? P4(S) + H2(g) – PH3(g) [unbalanced]
  • Please answer. The standard enthalpy of formation for H2020) is -187.8 kJ/mol. 20. The dilution of pure nitric acid, HNO30), can be represented by the following equation: HNO 3() Water HNO3(ag) + heat…
  • . ules. 12.39) Which of the following reactions is an addition reaction? 12.47 Complete the following reactions. Where more than one a. CAHg + Cl, – CH, Clz product is possible, show only the one ex…
  • Octane (C8H18)(C8H18) is a component of gasoline that burns according to the following equation: C8H18(l)+252O2(g)→8CO2(g)+9H2O(g)C8H18(l)+252O2(g)→8CO2(g)+9H2O(g) ΔH∘rxn=−5074.1ÂkJ  Quest…
  • Please answer. Complete the following questions to the best of your ability. You are allowed to have your chemistry data booklet and a calculator. There are NO phones, internet or textbooks allowed. I…
  • Does it matter if the unknown protein solutions are something other than the protein used in making the standard curve?Why, and what are your ideas for doing so?
  • For the reaction shown, calculate how many grams of oxygen form when each quantity of reactant completely reacts. 2HgO(s)→2Hg(l)+O2(g)  Part A: 3.00 gHgO  Part B: 6.94 gHgO  Part C: 1.23 kgHgO…
  • Enthalpies of Formation: Question #9 The solid rocket propellant for the Space Shuttle (and Tomahawk Missiles) contain ammonium perchlorate, NH,CIO4s) , and aluminum powder, Alg) bound together with p…
  • Hess’s Law: Question #7 Lead (Pb) has been used for centuries. The Romans used it in their plumbing systems ~ the symbol for lead (Pb ~ plumbus). To extract the metal, lead (II) sulfide (mineral galen…
  • Question 5 Enthalpy of Reaction: Question #5 Methanol, CH;OH, is a possible fuel for automobiles. Energy is evolved in its combustion with oxygen, 02: 2 CH3OH(g) + 3 Oxg) -> 2 COZ(g) + 4 H20() AHra…
  • You can use this worksheet to help you answer question 5 in Quiz 4.2. Fill in the missing information on the chart. Check your work, and then enter your answers online. Particle Symbol Relative Charge…
  • The reaction of aqueous copper (II) sulfate and potassium phosphate form a precipitate. 1 . Write the balanced chemical equation for the reaction described above: 3 ( U S Ou cag) + 2 X 3 Poy Car) -&gt…
  • Calorimetry: Question #3 Octane, CHja , is a constituent of gasoline, and burns in the presence of oxygen to produce water and carbon dioxide: 2 CeHis( + 25 02(g) – 16 Coxg) + 18 H20() AHrx = kJ/2mol …
  • Which of the statements best describes what occurs when a bowl of stew is warmed from 5 degrees Celsius to 55 degrees Celsius on a stove. A) the potential energy of the stew increases B) the kineti…
  • Question 1 2 pts Kinetic Energy: Question #1 The gas nitrous oxide, N20, is a dental anesthetic. 3) Calculate the root-mean square velocity (us m/sec) of N20(g) at a temperature of 27"C R. = 8.31…
  • Please help. BaO(s) + CO2(8) – BaCO3(s) AH =-274.8 kJ AJH(BaO(s)) = -558.1 kJ/mol AJH(CO2(8)) = -393.5 kJ/mol 7. Based upon the reaction, the molar heat of formation for barium carbonate is A) -548.1 …
    • g of magnesium mental reacts with 60 mL of 2 M hydrochloric acid. What is the mass of MgCl2 produced? Show all work
  • . 0 / 1 point Question 29 Indicate which of the following compounds has the lowest vapour pressure at a given temperature: – O NH2 O C NH 2
  • Enter your answer in the provided box. The activation energy (E) for the reaction 0 2N20(8) – 2N2(8) + 02(8) AH =-164 kJ/mol is 250.0 kJ/mol. What is the (E,) for the reverse reaction? kJ/mol
  • Indicate whether each sample below is a mixture (M), compound (C), or an element (E). If it is a mixture, identify if it is homogeneous (HOM) or heterogeneous (HET). (4 points) a. Air e. Salt and p…
  • Practice exercise. Practice Exercise The reaction 2A – B is first order in A with a rate constant of 2.8 x 10- s at 80*C. How long (in seconds) will it take for A to decrease from 0.88 M to 0.14 M? Si…
  • can you please answer in this format !   Â. Consider the reaction of 802 and 02 described by the chemical reaction below. Determine the equilibrium constant for this reaction. To do this, const…
  • Draw the structural formula for the following hydrocarbons. (4 marks) a. propane 2-butyne C. octane hexane 2. Name the following hydrocarbons. (4 marks) D. 3. Research and then design a laboratory set…
  • Practice exercise. Practice Exercise Consider the reaction 4PH3 (8) – P4 (g) + 6H2 (8) Suppose that, at a particular moment during the reaction, molecular hydrogen is being formed at the rate of 0.078…
  • Practice Exercise Write the rate expressions for the following reaction: CH4 (g) + 202 (g) – CO2 (g) + 2H20 (8) Similar problem: 14.5.
  • . An empty steel container is filled with 4.20 atm of H, and 4.20 atm of F.. The system is allowed to reach equilibrium. If Kp = 0.450 for the reaction below, what is the equilibrium partia…
  • Methane is a chemical compound with the symbol CH4, having four hydrogen atoms and one carbon atom. The molecule is modeled in a tetrahedral shape, with the four hydrogen atoms connected to a central …
  • Write the structural formula for each of the following: a. p-xylene b. 1-ethyl-3-methylbenzene c. 2,3-dimethylnonane
  • Write the structural formula for each of the following: a. methylbenzene b. 2-butyne c. 1,2-dimethylbenzene
  • Write the structural formula for each of the following: a. cyclopropane b. 2-octene c. 4-methyl-2-hexyne E
  • Below is a list of possible definitions for quantitative analysis and qualitative analysis. Match the most correct answer. Note that we are using the definitions stated in this course (not any other c…
  • Question 11 (2 points) () Listen Use the equation 2CAH10+1302–>8CO2+10H2O to find how many moles of oxygen would react with 1.7 mol C4H10 O 11 5.5 2.75 Onone of these Question 12 (2 poi…
  • a) If AG= -5kJ/mol and AGO= 3kJ/mol circle everything that must be true: Q = 1 Q>1 Q<1 Q< Keq Q= Keq Q > Kea b) Assuming temperature of 298 K, calculate the values of Keq and Q. 5. . Th…
  • Write the structural formula for each of the following: a. 3-methylhexane b. 3-ethyl-2-methylheptane
  • In solid, gas, and liquid, which one has the highest and lowest specific heat capacity? Why?
  • II 54/55 +100 What is the specific heat of an unknown substance if 100.0 g of it at 200.0 .C reaches an equilibrium temperature of 27.1 ‘C when it comes in contact with a calorimeter of water. The wat…
  • In the graph, y -axis, what is the unit of solubility? What does mg per 100g of water mean?. Variation of the solubility of carbon dioxide with temperature 400 350 300 /ing per 100g of 250 200 150 100…
  • Question 19 (2 points) Listen In the following balanced equation, 2CH +702 -> 4CO, +6H20. if 10g of C,He react with 42.5g of Oz. how many grams of water will be produced? 09 20.5 41 O 18…
  • Write the structural formula for each of the following: a. n-heptane
  • please help with these. Confirm that the formula unit of the OCI compound forming the given unit cell Is KaPtCL. Show your calculation OK explicitly. Opt How many formula units (F.U.) are within the u…
  • . Question 3 Use the following information to answer the next question. Not yet answered Marked out of The following reaction equation represents the complete combustion of ethanediol. 2.00 Remove 2…
  • Question 5 (2 points) Listen Use the equation 2HgO—2Hg+O, to find how many moles of mercury are produced if 74g of oxygen are produced. 4.6 9.8 2.3 7.2
  • Question 7 (2 points) 1) Listen 2NaN3 + 302 – -> 2NaNO3 + 2N2 According to the reaction provided, when 40 g of NaNg reacts, how many molecules of sodium nitrate will be produced? 9.2×10-…
  • . A person at Chernobyl was exposed to radiation and monitored over time for amounts of radioactive isotopes in his bloodwork. After some laboratory analysis done in 2016, the patient was found to h…
  • how does the energy level affect the specific heat capacity in the periodic trend? As the atomic number increased, how does the energy level affect the specific heat capacity?
  • . A radioactive substance decays over a period of two half-lives. To figure out how much radioactive substance remains, the amount will be 50% the original amount. O True O False
  • . Which radioactive isotope would decay the fastest? O lodine-131 O Cesium-137 O Strontium-90
  • . Which statement BEST explains the primary cause of the explosion in the nuclear reactor at Chernobyl? O There had not been enough control rods placed in the nuclear reactor at the time of the expl…
  • . Which statement BEST describes how a nuclear fission reaction begins? An unstable nucleus breaks apart which initiates a chain reaction. O Control rods are used to slow down the nuclear reaction. …
  • Complete the bottom chart only. Here is the link to the video: https://www.3cmediasolutions.org/privid/230335?key=6838d77941164cb5dd298a7a9e9bdc3b6f3ea3a0 Also show a sample calculation below illustra…
  • please I need help with this and please show workings. 9. How much energy is released in the production of 65.4 g of nitrogen dioxide according to the following equation? (Value: 3 pts) NO(g) + -02(g)…
  • Nuclear fission of uranium-238 occurredÂin the reactor of the nuclear plant at Chernobyl.  ÂTrue or False
  • The atomic number of the uranium isotope used in the nuclear reactor is 235.  ÂTrue or False?
  • any help with this is much appreciated.. Written Response Questions – Point values as described next to each question. Answer each question on your own paper and submit. Show all work to receive full …
  • Given the following thermochemical equations 2KCI(s) + 302(8) * 2KCIO3(s) AH = 78.0 kj P4(s) + 6Clz(8) – 4PCla(s) AH = -1148.0 kJ P4(5) + 202(8) + 6Cl2(8) – 4POCl3(g) AH = -2168.8 k] calculate AH …
  • Average experimental density of the three samples of saline a = 10381 4 15 . 4614 20- 8 d = 4 6 . 6 4 2 4 1ML 5. Range of the densities of the three samples of saline R = 1. 64 – 1. 03 R = 0 . 01 9…
  • Example 13.2 1 KGSCHON 12 J OWICK IN RA Consider the reaction youget my 4NO2 (8) + 02 (8) – 2N205 (8) for real Suppose that, at a particular moment during the reaction, molecular oxygen is reacting at…
  • Results Table: Part B Part C Cylinder Pipet 1. Density of first volume of saline 1. 038 1:0 682 2. Density of second volume of saline 1:03 1. 064 3. Density of third volume of saline 1:04 1.065 4. Ave…
  • . 5) (30 Points) In a study of the reaction of compound A and compound B in solution, the following initial reaction rates were measured at 25C [A] [B] Rate (mol L-1 ) (mol L-1 ) (mol L-‘ s-1 ) 1.0 …
  • 18 9 points You will upload work for this problem. Using the data below, determine the rate law for the reaction: 2NO2(g) + F2(8) –> 2NO2F(g) Experiment [NO2] [F2] Initial Rate (M/s) 1 0.100 0.100…
  • Linda works at Telus and sells cell phones to customers. She also sells phone cards to her customers at $10.00. Her employer gives her a bonus of 20% on total amount of phone cards only if she sel…
  • The ionization energy of one hydrogen atom can be calculated using Calculate the ionization energy for a) one hydrogen atom b) one mole of hydrogen atoms  2. The ionization energy of other at…
  • Use an energy diagram to give an example of each of the following. a) Pauli Exclusion Principle b) Hund’s rule c) Aufbau Principle  2. Write the ground state electron configurations of the …
  • Understanding resonance is a key concept to understanding the different ways a molecule can exist, simultaneously. How many resonance structures does the following molecule have: NO 2
  • need help figuring out parts per thousand. An ocean sample of mass 6,336 g is found to be have 17.85 g of calcium. What is this concentration of calcium in parts per thousand, ppt?
  • . Question 1: (1 point) For the reaction below, the equilibrium constant is Kc = 3.2×10-10 at 25 .C. Pb(s) + 2 Cr *(aq) = Pb2*(aq) + 2 Cr2+(aq) Excess Pb(s) is added to a solution for which the init…
  • . Question 2: (1 point) For the reaction below, the thermodynamic equilibrium constant is K = 5.09×10-3 at 40 "C. NH CO2NH2(S) -> 2 NH;(9) + CO2(9) Suppose that 0.0105 moles of NH,CO2NH2, 0….
  • . Question 5: (1 point) At 1,900 K, the equilibrium constant for the reaction below is Kc = 2.13. Br2(g) = 2 Br(g) What is the percent dissociation of Bry at 1,900 K, if the initial concentration of…
  • asap please Analytical Chemistry. 11-20. A 4.912-g sample of a petroleum product was burned in a tube furnace, and the SO, produced was col- lected in 3% H,O2. Reaction: SO2(8) + H202 – H,SO4 A 25.00-…
  • Can you use the spectrometer lab procedures to generate a standard curve to determine the concentration of other substances? Does it matter if the unknown protein solutions differ from the protein use…
  • try to create a report comparing your current intake chart to your DRIs and food group recommendations. Discuss where you are deficient in both micro- and macronutrients and what steps you can take to…
  • 11: Gases Calculate the volume of each gas sample at STP. a. 21.2 mol NO b. 0.215 mol CO c. 0.364 mol CO2 d. 8.6 mol C2H6
  • Topic: The Electromagnetic Spectrum and You many technologies use different types of waves from the electromagnetic spectrum. For example, the microwave uses microwave rays to heat food. These waves c…
  • you are writing a minimum 750-word letter of intent for a grant. A letter of intent is sent out to grant institutions to show them you have an interest in doing this particular work and to determine t…
  • Question 6 (1 point) Saved ) Listen In the balanced equation 2CH6+ 702 –>4CO2 +6H20, if 10g of C2H6 react with 42.5g O2. what is the limiting reactant? OH20 O co2 OCH 6 Question 7 (1 po…
  • Compare and Contrast Compare the particle compositions of the nitrogen atom and two nitrogen ions listed in the table. How are the compositions alike and different ?
  • Question 13 (1 point) () Listen Using the balanced equation 3Ba+Alz(SO4)3–>2Al+3BaSO4, if 4 g Ba react .45 g Al2(SO4)3, what is the limiting reactant? Ba Al2(50 4) 3 OAI BaSO4 Question …
  • What is the pressure in atm of a 5.00 L tank with 4.85 moles of oxygen at 39.3 °C?
  • )Listen Using the following equation, 2CH, +702 –24CO2 +6H20. if 2.5g C2Hg react with 170 g O2, what is the limiting reactant? C2H6 O Co2 OH20 Question 9 (1 point) 1) Listen Using the bala…
  • In the following equation: FeCla+02–>Fe203+Cl2, what is the limiting reactant if 4 moles of FeCla react with 4 moles of O,? OFecla O Fez Cls O C12 Question 5 (1 point) ) Listen In the e…
  • E T/ LISICII If there are two moles of hydrogen and 2 moles of oxygen that are combined to make water, how many moles of water can be made? 01 0 3 2 0 4 Question 2 (1 point) 1) Listen In th…
  • Balance the reaction shown below: C2H6 + 02 – CO2 + H20 Once balanced, given 0.763 moles C2 H6, calculate the moles of H20 produced.
  • (d) Draw Voronoi cells of reciprocal lattices A* and 1", preferably on the same graph.
  • How would you go about separating an aqueous salt solution into its two components?
  • need help figuring out parts per billion. Â. A river sample of mass 82,756 g is found to be contaminated with 0.098 g of sulfates. What is this concentration of nitrates in parts per billion, ppb?
  • Vitamin B-12 Âcontains 1000 microgram of cobalt Âin 30 mL of the supplement. ICP can be used to determine this vitamin through detection of Co. Molar mass of Vitamin B-12 is 1,355.4 g/mole and the m…
  • Predict the products that would result from each of the following reactions and balance the equation Combination:ÂMg(s) + Cl 2 (g) –> Decomposition:ÂHBr(g) –> Single replacement:Â Mg(s) + Z…
  • D Question 4 6 pts For 3.099 g of a compound containing only copper and oxygen, CuxOy, a student found that it contained 1.391 g Cu. How many moles of oxygen are present in the sample?
  • The chloride salt (IV, X = Cl) had a melting point of 48 °C and was hygoscopic. The bromide salt (IV, X = Cl) had a melting point of 93 °C and was not hygoscopic. Comment on the significance of thes…
  • The thermal behaviour of the tert-butylsulfinamide derivative of I was examined using DSC and a phase transition observed at 100 °C. Sketch the DSC curves for I assuming it exhibits (a) monotropy (b)…
  • What is the pressure (in atm) in a 5.00 L tank with 34.50 grams of oxygen gas at 350 K?
  • In the ICP-AES, what are M* and M+*? Explain how are they formed and why are they important. Based on the Boltzmann equation why flame spectroscopy could be used for determination of alkali metals b…
  • 2022-02-17,9:09 PM Name d) if 2-Chloro-5-fluoro-3-heptanone was reduced, what type of compound would be produced (be specific regarding classification – 2 marks) Chapter 16 5.a) What is the IUPAC name…
  • Compare and Contrast ÂCompare the particle compositions of the two examples of carbon atoms listed in the table. How are the compositions alike and different?
  • js viewer 2022-02-17, 9:09 PM Name: Chapter 14 3.a) Draw 3-Ethyl-1-hexanol in condensed structural format: (3 marks) b) What classification of alcohol would 3-Ethyl-1-hexanol be? (1 mark). c) If 3…
  • Using the following equation, 2C2HG 1 702-> 4 CO2 + 6H2 0, if2 .5 gC2 Ho. if 2.5g C2 H6 react with O2, how many grams of water will be produced? 41 4.5 82 Question 10 (1 point) Listen Us…
  • There are two forms of glucose called a-β and β-D glucose. One form of glucose can be converted into the other form by the process a-D glucose (↔) β-D glucose Kc = 2.3 at T = 25 C. A system initi…
  • Given the following reaction: H2504 + 2LiOH –> Li2504 + 2H20 What mass of water is produced from 10 g of sulfuric acid? 3.67 O20 O 10 108 Question 5 (1 point) Listen Given the following…
  • I did the problem as you can see here and it said it was wrong, I am confuse how I got it wrong
  • Using the equation 2H2+02–>2H20, when 47g of water are produced, how many grams of hydrogen must react? O 18 O6 O 12 O 24 Question 18 (1 point) Listen Using the equation 2H2+02–>2H2…
  • I need help with 15 and 31. journal project -1 x Chapter 33 Notes X () Chapter 34 Notes x M Inbox – wbfsmile x "A Honors Chem 21 X " HC-US Bal Eq, Pr * FC U6: Stoich, L F- CO webassign.net/w…
  • 2022-02-17, 9:09 PM PDF.is viewer Name : Ryan Desroches Assignment #1 – CHEM 1006 – Chapters 12-16 Due Date: March 3’d, 2022 by 11:59pm in Dropbox (30 Total Marks) Chapter 12 1.a) Draw 5-sec-Butyl-4-e…
  • Describe the physical properties for each intermolecular force using observations from the lab. Examples of the lab: Solubility Conductivity Surface tension Melting and boiling point  Intermolecular…
  • WHAT EFFECT DOES DRIERS HAVE ON COATING’S VISCOSITY
  • need help figuring out parts per million. Â. A river sample of mass 891 g has 47.7 mg of Sodium in it. What is the concentration of sodium in parts per million, ppm? Note: the Sodium is given in mg. …
  • ssignment-take [References] Iodine monobromide, IBr, occurs as brownish-black crystals that vaporize with decomposition: 21Br(9) 12(9) + Br2(g) The equilibrium constant Kc at 100 C is 0.026. If 1.80 x…
  • Use the solubility curve below to answer the following questions: 100 90 NaNO3 80 70 CaCk, K, Cro 60 Pb(NO 3) 2 KNO 3 Solubility (g of salt in 100 g H,O) 50 KCI 40 NaCI 30 20 KCIO 3 10 Ce2(SO4)3 O 0 1…
  • [References] The equilibrium constant (Kc) for the reaction PCls (g) + Cl2 (g) – PCIs (g) equals 49 at 230C. If 0.664 mol each of phosphorus trichloride and chlorine are added to a 1.30 L reaction ves…
  • e teaching and le x C lodine And Bromine React To G X genow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] Iodine and bromine react to give iodine monobromide, IB…
  • . and Safety Experiment A: Specific Heat of a Gas 1. On a separate sheet record your calculations for cp(Al). (see p. 465-466 in your text). Compute the percent error. The true value is listed in Ta…
  • I completely do not understand this. journal project . X () Chapter s3 Notes X () Chapter 34 Notes X M Inbox – whismil X 2 Honors Chem 2 X > HC-USBelEq. F FC U6: Stoich. L CO webassign.net WBSD Boo…
  • Convert 2.5 moles of C to moles of Co. 4 Co + 3C – COAC3
  • . journal project – x Chapter 33 Notes X ()Chapter 34 Notes X M Inbox -wbfsmile x Honors Chem 2 x " HC-US Bal Eq, PI X " FCU6: Stoich,L x – – C O webassign.net web/ Student Assignment-Resp…
  • . Gases are different from solids and liquids. In a sample of gas, the molecules are far apart. The gas molecules also move around and collide with each other as well as with the walls of the contai…
  • The unknown sample is 0.36g (1/1000 of serving size)was diluted with 50mL nitric acid. If the calibration curve of metal(K+) in unknown is y= 2.525x+5.5 and peak signal of unknown is 19, what is the m…
  • Use the solubility curve below to answer the following questions: 100 90 NaNO3 80 70 CaCk 60 Pb(NO 3)2 KNO 3 K2 Solubility (g of salt in 100 g H,O) KCI NaCl KCIO3 Ce2(SO4)3 O 0 10 20 30 40 50 60 70 80…
  • I need help with this one but i need it in the form like all the other questions. 1. If 25 g of NH; and 96 g of H2S react according to the following reaction, what is the maximum mass of ammonium sulf…
  • . Question 9: acid_base_Ka_from_buffer Quiz 2 A 0.022 mol sample of a weak acid, HA, is dissolved in 433 ml of water and titrated with 0.44 M NaOH. After Assess 29 ml of the NaOH solution has been a…
  • 1 5 Review ) MCB 15 |[ Graded | M Matron | M MHER.| Mail- 1. Q Chapter / L endeng |1 Findlet Me| B oult film https://www.prairielearn.org/pl/course_instance/128547/instance_question/125467063/ Conside…
    • How many of the following salts are expected to be insoluble in water? sodium sulfide barium nitrate ammonium sulfate potassium phosphate
  • A 1.5L of nitric acid solution was prepared by mixing 5mL concentrated nitric acid (SG=1.42) with sifficient quantity of water. Probable atomic weights: C=12, H=1, N=14, O=16 Â a. What is the percent…
  • Please help me with this lab. I don’t know what to do. Questions are at the end. Â QUESTIONS Â. Ultraviolet Spectroscopy kmax and E values were obtained from the CRC 63″] Edition Spectroscopy i…
  • List and briefly describe the examples of organic compounds presented.
  • need help figuring out molarity. Â Â. A potassium nitrate solution has a molarity of 2.41 and a volume of 9.42 L. How many mols of potassium nitrate are in the solution?
  • I need help with everything in the first photo and then the second one I only need help with the one that has the x, my answer is the answer that’s in the blank and they’re saying that’s wrong and I c…
  • Please answer three multiple choice questions. Which element has the highest electron affinity? * 1 point O Li ON O o O F O Ni Energy released when "excited" electrons return to lower energy…
  • Which of the below elements has the lowest ionization energy? * 1 point a. Sulfur b. Phosphorus O c. Silicon O d. Aluminum e. Magnesium What was De Broglie’s contribution to the quantum mechanical mod…
  • Please answer both multiple choice questions. Which situation must be true for two electrons to occupy the same orbital? 1 point O a. The electrons must have the same principal quantum number, but the…
  • Please answer the three multiple questions. Which of the following is the electron configuration for sodium? * 1 pain a. 1s2 283 2p5 3s1 b. 193 2s3 2p3 3s2 c. 1s2 2s2 2p5 3s2 O d. 1s2 2s2 2p6 3s1 e. 1…
  • Please answer the first three questions. Which element has the ground state electron configuration [Ne] 3s2 3px1 1 pal 3py1 for its valence electrons? * Mg Al O Si O What is the maximum number of elec…
  • write a pre-lab summary on ionic/covalent compounds  In this experiment, observations will be made about the behavior of compounds in solution; specifically, observations will be made about the ab…
  • A sample of commercial raw material subjected to HPLC external standard analysis is prepared as follows: An accurately weighed amount of raw material is dissolved in 100.0 mLÂof solvent; 5.0Â mLÂof…
  • Which of the following is the electron configuration for the valence shell of 1 point oxygen? * a. TUTU JI d. T TV TV I 2s 2p 2s 2p b. TI TL T T e. TT TL TT 2s 2p 2s 2p O b O d O e The of a wave if de…
  • Please answer multiple choice. Which atoms could have the valence electron configuration shown below? 1 point S P ON3-(nitrogen ion with a 3-charge) 02- (oxygen ion with a 2- charge) Ar Cl- (Chloride …
  • Please answer questions. 2. Consider the pattern on the periodic table. a. What group number would element 119 would be in? [1 Mark] b. Predict the condensed electron configuration for element 119. If…
  • Answer question please. la. Draw an energy level diagram and electron configuration for a copper 1+ ion. Be sure to include an energy scale and label all orbitals. [4 Marks]
  • Please answer questions. 3a. Using orbital diagrams, explain why sulfur is an exception to the trend we observe in ionization energy. Be sure to explain what the trend suggests, and how sulfur differs…
  • omplete this lab according to the instructions in your textbook on page 473 ree Analysis Questions . (20 points ) aterials Needed : 400 mL beaker (or glass 5 g baking soda 5 mL vinegar
  • Please answer the question. 2. Using what we have learnt in class, which non-metal listed below would have the largest ionization energy? Why? Be sure to use proper terminology. Oxygen, chlorine, fluo…
  • Use the RPECV model to predict the geometry, bond angle, and hybridization state of the central atoms of: a) SiBr4 b)CS2 C)NO3- d)BCl3
  • Explain the difference between soluble, slightly/low solubility and insoluble salts
  • Write the chemical equation for precipitation reaction for Lead (IV) iodide
  • Intermolecular Force Example from the lab State of matter at room temperature Conductivity Solubility in water  Macro- Ionic     Macro Covalent      Metallic      H…
  • I need help with these questions please. Determine how the following errors would impact your calculated of K., state whether Ko, would be larger, smaller or unchanged. Justify your answer quantitativ…
  • Explain, on the molecular level, how Lead (IV) iodide precipitates out of water
  • Please complete the chart and answer the question below. 2).pdf Part B: Communication (12 Marks) Open with la. In the following table, write a complete set of quantum numbers for the electrons listed …
  • C – Single Replacement Reactions Please view the video below and answer the following questions. https://www.youtube.com/watch?v=4xLmQvoKFIg 1. Why does aluminum displace copper in the first reaction …
  • View the video and complete the table below. https://www.youtube.com/watch?v=yLsisy Dqdo Observations Balanced Reaction Equation
  • Natural argon has three isotopes: Ar-36 (35.967 u), Ar-38 (37.962 u) & Ar-40 (39.962 u). If the isotopic abundance of Ar-36 is 0.006000%, find the isotopic abundances of the other two isotopes.
  • View the video and complete the table below. https://www.youtube.com/watch?v= G7sNq7R29w Observations Balanced Reaction Equation
  • Please view the video* below and answer the following questions. https://www.youtube.com/watch?v=10cQhkHw MM 1. Two reactions were demonstrated in the video above. Write the balanced equations for bot…
  • Describe the effect on the above potential energy diagram of reacting an equal mass of powdered carbon, and explain your answer. Â 2.. 4. A strip of magnesium was cut into 4 pieces, each of length …
  • I need a simple example each of the following. nuclear energy thermal energy electrical energy mechanical energy
  • . 3. Balance the following equations by placing the lowest combination of coefficients on the line provided. (10 marks) a. ___SkyL(aq) + ___FiSl,(aq) SkSI(s) + ___Fil(aq) b. BsHk,(aq) + PI(s) Bs(S) …
  • Direction: Answer the following questions: 1. Why do we need to repel insects? 2. What are the typical target insects of most repellants? What harm can these repellants bring to humans? 3. What are th…
  • . Google . LTE & 7:15 PM 0 7 0 2 0 42% Done 1 of 4 Exams CHM152 (FL21) Homework 1 page 5 Calculations Involving Thermochemical Equations 9. 7.20 g of aluminum is burned in excess oxygen at const…
  • Direction: Answer the following questions: 1. What is the purpose of soap during the early times? 2. What are the ingredients used in soap making by the ancient Babylons, Egyptians, and Romans? 3. Wha…
  • Research about five plants that can be used as cosmetic ingredients. Enumerate their cosmetic uses and chemical compositions. Write the procedure on how to use it as a cosmetic product. Motion: Answe…
  • Questions 1. The decrease in turbidity of the slurry and the eluent during the course of the run is related to the removal of calcium carbonate solids from the water. On a single graph plot the turbid…
  • Name the following ionic compounds containing Type II cations Chemical Formula Chemical Name MnC13 Fe3P2 Pb2 C OsSez Zr02. Chem 107 Worksheet: Nomenclature (Part I) Name: Odalys Martinez Student ID…
  • . M1LE5 Hand-In Assignment: Neutralization Calculations In this assignment, you will apply a step-by-step method to solve neutralization problems and to calculate the concentration or volume of an u…
  • Now Remove water with the valve on the lower right. What happens to the concentration as the quantity of water decreases? [ | Explain why. (Mention what is happening to the quantity of solvent and …
  • . M4LE6 Hand-In Assignment: Applying Le Chatelier’s Principle In this assignment, you will apply Le Chatelier’s Principle to a "real life" chemical process. Unless you are instructed diffe…
  • The decrease in turbidity of the slurry and the eluent during the course of the run is related to the removal of calcium carbonate solids from the water. On a single graph plot the turbidity vs. ti…
  • Task 2: Storyboarding Your Website You have learned about different storyboarding techniques. Use a storyboarding technique of your choice and create the layout using word processing software. Include…
  • . Mass of Nacl Table view List view Mass of NaCl Mass (g) Beaker with NaCl & boiling chips 81.43 Empty beaker with boiling chips 79.78 Nacl Mass of CaCO3
  • Hello there, I Upload the question,. I hope I get help. Thank you
  • 3-3 Composition of Chemical Compounds 77 to answer such questions as, "How many C atoms are present per mole of halothane?" In this case, the factor needed is 2 mol Cemol C, HBICIF . That is…
  • I need help with this work sheet. Element Atomic Mass (P) Symbol (N Number (e- ) Number Protons Neutrons Electrons 39 2 30K +1 3 Fe +2 4 36 CI" 5 207 Pb 6 122 51 51 7 29 64 29 8 24 28 18 9 13 14 …
  • What ever u can help with idk. check with your teacher to find the actual reaction that took place. Calculate your similar resures 4. If you repeated this experiment, would you expect to get similar r…
  • Part A: Â. For the reaction, calculate how many grams of the product form when 3.0 g of Cla completely reacts. Assume that there is more than enough of the other reactant. 2 Na (s) + Cl2 (g) – 2 NaCl…
  • . MISSED THIS? Watch KCV 8.2; Read Section 8.3. You can click on the Review link to access the 4.61 x 10* mol N205 section in your e Text. Express your answer using three significant figures. For th…
  • When separating the water from the food coloring solution, there was no attempt made to measure the amount of water separated by distillation. Propose a method that would allow someone to quantify the…
  • Describe a large-scale application of separations that has an impact on our everyday lives.
  • Classify the materials created at each step in the process of distillation as homogeneous or heterogeneous mixture, or substances
  • . C. Activity 2 DIRECTION: Fill-up the table below. Check to determine the type of force that is most evident for each substance. SUBSTANCE POLAR/ LONDON DIPOLE- HYDROGEN ION- IONIC NONPOLAR | DISPE…
  • Valine has pKa’s 2.286 and 9.719. Estimate the fractional composition of the neutral, zwitterionic form (i.e.,Â), at pH=5.
  • A buffer solution is prepared from equal volumes of 0.200 M Âacetic acid and 0.600 M Âsodium acetate. Use 1.80Â×Â10 −5 Âas K a Âfor acetic acid. Show work. (a) What is the pH of the s…
  • Which of the following will increase the percent of NH 3 that is converted to the ammonium ion in water? (a) addition of NaOH (b) addition of HCl (c) addition of NH 4 Cl  The answer is B, but why?
  • ahh hello again–I’m very much stuck on this question as well i don’t really know where to start–i need some assistance a bit–thank you so much!! :))). Stoic & EXP aT Proc at Proc 5 2021 21 The …
  • What is the proper IUPAC name, including stereochemical designations if needed, for Compound E? 4
  • . The graph below shows DG versus T, as described by the following equation. 20 -20 -40 220 240 260 280 300 320 340 360 Tm 09 Au G(T) = Au H(Tm) (1 -7 + ACp . T – Tm – TIn ( Tick all that applies: L…
  • The reusable booster rockets of the U.S. space shuttle employ a mixture of aluminum and ammonium perchlorate for fuel. A possible equation for this reaction is 3Al(s) + 3NH CIO,(s) Al,O3(s) + AlCI,…
  • . Question 7 Benzene (C H ) undergoes combustion according to: Type numbers in the boxes. 10 points 2 C6H6(1) + 15 O2(9) – 12 CO2(9) + 6 H20(1) AH = -6535 kJ All of the heat from the combustion of 4…
  • How much ice is required to cool a 15.0Âozoz drink from 72 ∘F∘F to 35 ∘F∘FÂif the heat capacity of the drink is 4.18 J/g∘CJ/g∘C? (Assume that the heat transfer is 100 %% efficient.)
  • . Question 6 Lead(II) oxide can be reduced to form elemental lead through the reaction: Type numbers in the boxes. 10 points PbO(s) + C(s) – Pb(s) + CO(g) Calculate AH for the above reaction given t…
  • . Question 5 The combustion reaction of hexane is: Type numbers in the boxes. 10 points 19 C6H14(1) + 2 O2(g) + 6 CO2(9) + 7 H20(1) The heat of combustion of hexane is -4163 kJ/mol. Given the follow…
  • . Question 4 Use the Standard Thermodynamic Properties table to calculate AH for the Type numbers in the boxes. following reaction: 8 points 2 H2S(g) + 3 02(9) -+ 2 H20(9) + 2 SO2(9) kJ
  • What is the molar concentration of hydroxide ions in a solution made by mixing 75.0 mL of 2.50 M potassium hydroxide with 125.0 mL 3.75 M calcium hydroxide?
  • . Question 2 Calculate the amount of heat produced when 7.387 L of liquid glycerol Type numbers in the boxes. (C, H O, ) is burned in excess oxygen gas according to the following 10 points thermoche…
  • (16 pts) For all four potential cations from Parts A & B, write the formula unit, total ionic, and net ionic equations involved in the confirmation step of the analysis -?…
  • …. QUESTION 1: Which of the following molecules would you expect to exhibit dispersion forces? Why? a. HCI (hydrogen chloride) b. CHCI, (chloroform) C. Oz (oxygen) QUESTION 2: What is the ty…
  • what volume of H2 gas, in mL, would be occupied by 0.00261 moles of H2 gas at a temperature of 0 degrees celsius and a pressure of 760 mmHg  how many grams of hydrogen gas can be obtained from 0.433…
  • It says to Determine Mn and DP for the following polymer sample. (Hint: for sharp peaks, the integral ~ peak height). However I am not sure how they got the answers they did.. 0.938 3.739 1.829 H NMR …
  • answer with explanation. A weather balloon contains 343 L of helium at 24 "C and 14.7 psi. What is the volume of the balloon when it ascends to an altitude where the temperature is 57"C and …
  • . Each chemical equation below contains at least one error. Identify the error or errors and then write the correct chemical equation for the reaction. 1. K(s) + 2H2O(1) – 2KOH(aq) + H2(g) CK ( s ) …
  • answer with explanation. estian 8 of 20 Question 8 1 points Sinve MISVIET A sample of argon gas has a volume of 20.0 mL at a pressure of 1.50 atm. What is the pressure exerted by the gas if the volume…
  • When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water areÂproduced.  CaCO3(s)+2HCl(aq)⟶CaCl2(aq)+H2O(l)+CO2(g)   How many grams of calcium chloride…
  • . Question 6 A calorimeter initially contains 165.0 mL of water at 21.3 C. When 2.72 g K Type numbers in the boxes. is added to the water, the temperature of the resulting solution rises to a aby Pa…
  • Choose an article involving chemistry published within the last six months. Explain how a chemistry topic can be used to understand the chemistry behind this article. Provide source.
  • Use LeChatelier’s Principle to explain the color changes observed upon addition of excess Fe3+ and SCN- to an equilibrium mixture of reactants and products in this complex ion reaction?
  • Respond to the following questions with short responses.. Chemistry explains a macroscopic phenomenon (what you observe) with a description of what happens at the nanoscopic level (atoms and molecules…
  • 1)Indicate whether the examples of forms of energy are kinetic energy (KE) or potential energy (PE). The vibration of atoms connected to chemical bonds PE or KE Ionic bonds between entities PE or KE M…
  • . Part B Now calculate the surface area of the cell with a diameter of 2 am using the equation A=4ar2. Express your answer in square micrometers using three significant figures. VO AEd ? Submit Requ…
  • Your car is leaking gasoline at rate of 0.0250 gallons per min. If your car has a 12.00 gallon tank and is full, how many hours will it be before your car is completely empty (3 points)? If you were…
  • Measurement Trial  1 2 3 4 5 6 7 8 9 10 Average mass of empty calorimeter (g) 4.25 4.24 4.24 4.24 4.24 4.24 4.24 4.24 4.24 4.24  mass of calorimeter + cool water (g) 80.04 82.11 84.06 78.13 80.55 …
  • SummarizeÂtheÂfollowing description of a chemical reaction in the form ofÂaÂbalanced chemicalÂequation.“WhenÂsolidÂsodiumÂbicarbonateÂis heatedÂinÂa testÂtube,ÂanÂinvisibleÂgas,Âca…
  • . a)C-N b ) C -C c ) C – O 8. Classify each bond as nonpolar covalent, polar covalent, or ionic. a) C – CI b) C – Li C) C-N 9. Complete the chart by writing formulas for the compounds formed: Mn04- …
  • The scientist now wants to know how the CO32- concentration might change on the coral Âreef with ocean acidification. To a first approximation, ocean acidification alters the CO2 and CO32- concentr…
  • How does the structure of acetylsalicylicÂacid affect the solubility in a polar solventÂafterÂreacting with sodium hydroxide? Why is water a better solvent for this analysis than acetone? 2. W…
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  • answer the following with steps Mass of Mg(s) 0.31 g Initial temperature of calorimeter contents 23.6 ºC Final temperature of calorimeter contents Volume of calorimeter 36.8 ºC 100mL Use the calorim…
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  • Answer this  Use the multimedia presentation for this investigation to record the data for the first trial in this experiment. Create a table like the one below and fill in the appropriate values.Â…
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    • 64. A 1.0 L buffer solution is 0.125 mol Lin HNO, and 0.145 mol L in NaNO2. Determine the concentrations of HNO, and NaNO, after the addition of each substance: a. 1.5 g HCI b. 1.5 g NaOH c…
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  • please explain give correct and complete answer no copy paste
  • The rest 14) Consider the chemical reaction given by: CHA(g) + 2 02 (g) -> CO2(g) + 2 H20 (g) In this reaction there are——- atoms of oxygen on each side of the chemical equation. This chemical …
  • Your email will be recorded when you submit this form Significant figures Determine the number of significant figures in each of the measurements below. 197.4 liters I point Your answer 70.73 meters 1…
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  • Submitted 13.12/15 Total points awarded Help Exit You received partial credit in the previous attempt. el the variables in the equation below with the correct units. S-1 M . S-1 M 2 5- 1 M rate = K[A]…
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  • please answer in format of answer sheet and correct sig figs, thank you!. 2. A reaction proceeds with A H = -60 kJ/mol. The energy of activation of the uncatalyzed reaction is 140 kJ/mol, whereas it i…
  • A certain element has three stable isotopes with the following masses and percent abundance: Isotope 1: Â 27.976927 amu;Â Â92.2297%Â Isotope 2: Â 28.976495 amu;Â Â Â4.6832%Â Isotope 3: Â 29….
  • A metal weighing 74.8 g was added to a graduated cylinder containing 23.3 mL of water. The volume of the water plus the metal was 30.7 mL. What is the density of the metal?
  • . Use Goal Seek in Excel to calculate [OCI~], [HOCI], [H*], and [OH ] for a 0.0376 M NaOCl solution. The pKa for HOCl is 7.53. Ignore activity coefficients. [oCI] = M [HOCI] = M [H*] = M [OH ] = M D…
  • A hypothetical element has 3 stable isotopes. The masses of the isotopes and percent abundance of the first two isotopes are given. What is the percent abundance of Isotope 3? Isotope 1:Â Â18.556 am…
  • Part 1 of 3 Points: 0 of 2 Save Use the accompanying network figures to complete parts (a) through (c) below Click the icon to view the network figures (a) Find all the spanning trees of the network s…
  • what type of chemical bond is present in this? C15H11I4NO4
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  • Worked Example for Calculating the Molar Mass of H2O:
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  • I already tried, I want to compare answers. Â Â Â Â. 1. In the lab, 3.00 k] was applied to a 150 g of an unknown liquid, causing the temperature to increase from 16.50 C to 24.37 .C. Calculate the…
  • Hello again I’m a little stuck on b and the rest on the way down–i got (a) but for the rest i’m a little confused 🙁 Â. 4. A model rocket is launched straight upward with an initial speed of 4…
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  • The volumes of a standard solution containing 2.50 ppm of Zn 2+ shown in the table were pipetted into separator funnels, each containing 10.00 mL of an unknown zinc solution. Each was extracted with t…
  • Determine the neutral formula unit for the compound formed from the ionsÂMg2+Âand SO2−3.
  • . Determine the equilibrium constant for a reaction at 200 K if AG =21.7 kJ/mol. (R = 8.314 J/mol . K) 0 of 1 point earned 6 attempts remaining Determine the temperature of a reaction if K = 1.20…
  • Enter your answer in the provided box. The activation energy (E.) for the reaction 2N20(g) – 2N2(8) + 02(8) AH =-164 kJ/mol is 330.0 kJ/mol. What is the (E.) for the reverse reaction? kJ/mol
  • AA ezto.mheducation.com a CHM1030_ONL1FA_… Lo .CampusPortal .CampusPortal x M Question 5 – W5: Ch… G can morning sickne Quiz i Saved Help Save & Exit Submit Complete the following sentences on…
  • .. .CampusPortal .CampusPortal x M Question 3 – W5: Ch.. G Saved Help Save & Exit Sul lete the table below for zero, first and simple second order reactions. k, In [A]. [A]2 vs. t …
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  • Covalent molecules are molecules formed from O the sharing of electrons O loss of electrons gaining of electrons transfer of electrons
  • What is an ionic bond?ÂÂ(Describe how the bond is formed; think about the electrons). 2. How can you use the periodic table to predict if a chemical has ionic bonds? 3. When do you have to use…
  • answer given by document owner proceeds onto the next page. 5. Explain: Why does the reaction proceed more quickly when the surface area is increased?
  • I already tried, I want to compare answers. Â Â. Use the following informatlon to answer the question 5. Camp stove can burn a variety of fuels such as fuels such as white gas, kerosene diesel, naph…
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  • please explain give complete and correct answer
  • In a single covalent bond, how many electrons are being shared between atoms?
  • . 5. (a) Accurately prepare a 5.000 mM calcium nitrate solution from one of the following glassware options: Volumetric flasks: 100~mL, 250~mL, SGO-rnL J4 Clearly indicate the mass of solid needed f…
  • Please help ASAP 3. 10. Predict the reaction between solid copper(II) and aqueous zinc nitrate, then balance the equation. 11. Balance the following equation after writing the products: C2H(9) + 2(9) …
  • . Unit 4 Summative Part B CEM131 This is the free-response part of the exam for the unit. You are required to hand-write the answers to these questions on a separate sheet of paper, scan the answers…
  • Please help ASAP 2. 8. Predict the products of the reaction between a solution of sodium hydroxide and a solution of iron(III) chloride, then balance the equation. What type of reaction is this? 9. Wh…
  • Please help ASAP. 6. Write the balanced equation when aluminum oxide is formed from its elements. 7. Write the balanced equation for the decomposition of sodium carbonate by heating.
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  • ch101 balance equation. 10 3 points From the following balanced equation, CH4(g) + 202(8) –> CO2(8) + 2 H20(g) how many grams of H2O can be formed when 12.25 g of CH4 are combined with 9.25 g of O…
  • ch101 balance equation. O 3 points From the following balanced equation, CHA(g) + 202(8)–> CO2(g) + 2 H20(g) how many grams of H2O can be formed from 4.25 g of CHA? Show all of your work. No Work …
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  • How many oxygen atoms are on the right-hand side of the following chemical equation? 4FeS2(s)+11O2(g)→2Fe2O3(s)+8SO2(g)
  • . At 90 degrees C, the following equilibrium is established: H2(g) + 5(5) H H25(g) Kc = 6.8 x10-2 If 0.16 mol of hydrogen and 0.2 mol of sulfur are heated to 90 degrees C in a 1 L vessel, what will …
  • Please answer!! Would like it hand written out and enough where I can actually understand what to do!. Stoichiometry Review 1. How many moles of magnesium is 3.01 X 1022 atoms of magnesium? 2. How man…
  • an alpha particle from Ag−111Ag−111 Express your answer as a nuclear equation.
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  • . Consider the following reaction: C3Hg + 502 —) 3002 + 4H20 Identify what main category of reaction it is. If possible, further categorize it into all other relevant types of reaction. C] Synthes…
  • I already try, I want to compare answers. Purpose In this investigation you will construct and determine the precision of a calorimeter. Problem What is the precision of the calorimeter tested as dete…
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  • Sample Number Mass of sample 1. 085 Concentration of standardized NaOH 0 . 065 7 1 M Trial 20 cole 4 NaOH volume T 17.9 18.0 18 . 18.0 Mol of K* in 10 mL of solution 21182 Moles of K* in 100 mL sample
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  • Tutored Practice Problem 8.3.3 COUNTS TOWARDS GRADE Close Problem Calculate percent yield. Consider the reaction of NO with H2 to form N2 and H20. If 3.91 g H2 is reacted with excess NO and 23.2 g of …
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  • I need help with 16, 20,21 and the first pic with no number. I hope you can helpl!. journal proje x ()Chapter 331 X () Chapter 341 x M Inbox – wbfs CengageBral X , Honors Cher X HC-U5 Bal Eq X " …
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  • adivis easta al way of answers ,A Characteristics Cu Value Ag Value Atomic no. 29 47 Atomic mass (amu) 63.54 107.87 Melting point ("C) 1,084.50 961.9 Density (8/cm ) 8.92 10.5 Crystal Structure f…
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  • I need help with Â8 and then 12-14. journal proje X Chapter 33 x () Chapter 341 X M Inbox – wbfs X CengageBrai X Honors Cher X HC-US Bal Eq q x HC U6: Stoic – > C 0 webassign.net/web/Student/ Assi…
  • . For the reaction below the partial pressure of NO, is 0.26 atm and the partial pressure of NO is 1.0 atm. What is the Q of the reaction? 2 NO, (9) – NO. (g) Kp = 0.25 0 of 1 point earned 6 attempt…
  • . Consider the equilibrium system described by the chemical reaction below. At equilibrium, a 5.0 L reaction vessel contained a mixture of 1.2 mol CH , 2.8 mol H,S, 0.63 mol CS,, and 0.042 mol H,…
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  • make 25ml of solution for GC out of 100% methanol and 2% nitric acid as diluent
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  • What is the volume of a 5.6 M NaCl solution needed to make 750 mL of a 2.5 M NaCl solution? Paragraph B U A/ O +
  • How much 0.5M Sulfuric acid can be made by diluting 400 mL of 8.0 M Sulfuric acid Paragraph B U A/ E +
  • Spector lons for this reaction are Na \and SO, Na (OH) (ag)+H2SO4( ag) .Na2504 ( ag)+2H20 ( 1 True False
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  • In a titration of 25.0 mL of 0.937 M HNO3, mL of a 0.937 M NaOH solution is required for neutralization, 25.0 e 18.8 C 13.5 50.0
  • The molarity of an aqueous solution containing 25.8 g of NaCl in 50.5 mL of solution is M. O 9.50 C 8.71 O 8.712 0.444
  • Consider the following reaction: 3 Si + 2 N2 . SigN4 When 10 moles of Si reacts with 10 moles of No, how many moles of SigNa are formed? show your work for full credit.
  • What volume (mL) of a concentrated solution of magnesium chloride (8.000 M) must be diluted to 750.0 mL to make a 3.750 M solution of magnesium chloride.? O 351.6 O 351.56 O 351.5 351
  • Use the information below to answer question 2. The dissociation of KOHs) in water is given by the following equation: KOH(s) —–> K+(aq) + OH-(aq) In a lab the following data was collected: Vari…
  • I need help with all 9-11, i put them all together because they are somewhat close! I hope you can help!. journal proje x () Chapter 331 x ()Chapter 341 x M Inbox- wbfs x CengageBral X Honors Chel X H…
  • The electronic structures of various atoms are shown below. i.  Which one of these structures A to E represents the noble gas?   ………………………  ÂÂÂÂÂÂÂÂÂÂii.  Which…
  • I need help with both 6 and 7Â. journal proj Chapter 38 1 x () Chapter $41 X M Inbox – wh’s x CengageBre X > Honors Che C FC-US Bal E webassign.net 7 FC UG. Stol WESD Bookmarks X G B Reading list …
  • . joumal proj X Chapter S81 x x () Chapter 841 X M Inbox – wb’s X CengageBre X Honors Che FC-US BalE < HC UG: Stol CO webassign.net d X G WESD Bookmarks Sis ) 8 Reading list (g) Ca3(P04)2 SV 9. […
  • The formula weight of magnesium hydroxide is _______ amu. Include the chemical formula showing all work
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  • If Kp = 3.5 at 25 ‘C for the reaction shown below, calculate the numerical value of Kc at 25 .C for the same reaction 2 NO(g) + 2 H,(g) <–> N, (g) +2 H,o(g) A 7.3 x 102 B 1.5 x 10-3 86 Your ans…
  • What is the pH of a solution formed when 0.161 L of 5.19 M HCI is mixed with 0.809 L of 2.64 M NaOH? Submit Answer Tries 0/45
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  • A solution containing sulfuric acid dissolved in water has a density of 1.84 g/mL and a concentration of 98.0% sulfuric acid by mass. Density is 1.84 g/mL. Calculate the molarity of this solution.
  • Ag(s) + 1/2 Cl2(g) – AgCI(s) AH =-127.0 kJ 1/2 H2(g) + 1/2 Cl2(g) ——> HCl(g) AH = -92.3 kJ H2(g) + 1/2 02(g) —-> H20(l) AH = -285.9 kJ Ag2O(s) + 2 HC|(g) —-> 2 AgCl(s) + H20(l) AH =-3…
  • The formation reaction evidence for three compounds are shown below. C(S) + 02 —-> CO 2 AH =-393.5 kJ H2 + ½ 02 ——> H20 AH = -241.8 kJ 7 C(s) + 7 H2 ——> C7H14 AH = +115.0 kJ The st…
  • Question 13 (1 point) The enthalpy changes for three compounds are shown below. ½ N2(g) + 02(8) – NO 2(8) AH = +33.2 kJ Ha(a) + ½ 0248) – H20(3) AH =-241.8 kJ N2(g) + 2 H24) – N2HA(6) AH = +46.7 kJ …
  • . Part III: Answer the following short answer questions (2.5 marks) 1. What is the purpose of rinsing the voluntetric pipette with the solution to be transferred? (1 mark) 2. Why should you never pi…
  • Question 14 (1 point) In a laboratory experiment, a chemist wants to empirically determine the enthalpy change for the following reaction: MB(s) + 2 HC/(ag) + MgC/2(ag) + H2(8) The chemist uses a simp…
  • . Part II: Indicate if the following statements are true or false. (1 mark each, 2 marks) 1. Before a volumetric pipette is used, it must be cleaned with distilled water and then rinsed with the sol…
  • Question 15 (1 point) When 60 mL of 1.30 mol/LAgN03(aq) and 60 mL of 1.30 mol/L HC|(aq) are mixed in a simple calorimeter, the temperature rises by 8.09°C. The molar enthalpy of reaction of HClan) is…
  • Question 16 (1 point) Hydrogen gas and zinc chloride are produced when zinc reacts with hydrochloric acid. For each mole of zinc that reacts, 80.7 kJ of energy is liberated into the surrounding soluti…
  • . 4. Explain why CH&COOH is an acid while CH,OH is not.
  • . 3. Consider the two carboxylic acids shown below. The K;l of formic acid is 1.8 x 10″I and the K1 of benzoic acid is 6.3 x 10—5. :0: :0: || .. || .. C—Q—H H—C—Q—H Formic acid Benzoic…
  • . 2. Consider the four acids shown below. Explain why acidity increases as the number of oxygens added to the halogen increases in terms of electronegativity. Hypochlorous Chlorous Chloric Perchlori…
  • 1 Quiz X Time Left 1:25:13 Sophie Klyen Attempt 1 Question 11 (1 point) ABIS) + 1/2 Clz() + Agcl(s) AH – -127.0 kj 1/2 H2() + 1/2 Cl2() – HCke) AH – -923 KJ H2() + 1/2 02(#) – H20() AH – -285.9 1 AB20…
  • Calculate the equilibrium molarity of HCI. Round your answer to two decimal places.. Suppose a 500. mL flask is filled with 0.80 mol of Cl,, 1.4 mol of HCI and 1.2 mol of CCI,. The following reaction …
  • Fill in the blank then answer these questions- Post Lab Questions: 1) List all the symbols for all the sets of isotopes. A. What do the atoms in Each Isotope set have in common with one another? B. Ho…
  • If the molar heat of combustion of ethane (C2H6) is -1560 kJ/mol. The heat produced when 121 g of ethane is burned is a.bc MJ
  • . Consider HOI and HOCl. Which is a weaker acid? Justify your answer in terms of the electronegativity of the halogen.
  • 29 9 3 Answer Question 3 (1 point) 6 2.00 KJ of heat flowed to a 97 g sample of a liquid solvent, causing a temperature increase from 15.15 .C to 21.49 .C. The specific heat capacity of the liquid a.b…
  • Which one(s) is/are NOT the correct way to write the electron configuration for mercury (Hg)? FYI the “^” in the answer is for a superscript or it should be 4f 14 will be written as 4f^14.  HINT…
  • . For the reaction 2 HCI(aq) + K2503(s) – H20(/) + SO2(g) + 2 KCI(aq) answer the following questions. 1. What is the mole ratio of HCI : K2SO3 in the equation? O 3:1 OJ 2:1 O 1:1 O 1:2 O 1:3 O 2:3 O…
    • kJ of heat flowed to a 97g sample of a liquid solvent, causing a temperature increase from 15.15 to 21.49 degrees Celsius. What is the specific heat capacity of the liquid a.bc J/g•C
  • . Consider the following equilibrium: 032(3) + 3 012(g) : sgcl2(g) + 0014(g) When 0.50M 082 and 1.50M 012 are placed in a container and allowed to come to equilibrium, the mixture is found to contai…
  • What do I put in the data table? Â. Leftover Aluminum Wire – Stoichiometry Lab 5 Mass of weighing dish + copper(g) 6 3. 15 Mass of weighing dish (g) 7 2,41 Actual mass of recovered dry copper (g) (#5…
  • Please answer questions 4-6. 4. The activity of an enzyme requires a glutamic acid to have a protonated COOH. Use a pKa of COOH group 4.07. a) Will the enzyme be more active at pH 3.5 or 4.5? b) What …
  • Calculate the pH of IM NH, Cl then calculate the pH after 10 mL of 1 M NaOH is added to 40 mL of 1M NH,Cl. 3. Calculate the concentration of lactate in blood plasma at pH 7.4 if lactic acid is 1.5 …
  • hydroxyl (OH) radical is the key oxidant in the global atmosphere as it controls the concentrations of toxic gases like carbon monoxide and climate-relevant gases like methane. Comment on the importan…
  • . What do you think the future of hydrocarbons fuels will be in the world? Discuss the various alternative sources that have been developed and list some of the advantages/disadvantages they have. F…
    • Increasing concentration (increase – decrease) reaction rates 2- Increasing surface area (increase – decrease) reaction rates 3- Increasing temperature (increase – decrease) reaction rates
  • By using the activity series chart, put the following metals in order of decreasing the activity (increasing the stability): Cu, Ag, Au, Fe, Na, Zn, Co, Mg, K, Mn, Ni, Ba, Pt Most Least Active Active
  • 5A Experiment Density of H2 gas as compared to air Solubility of H2 gas in water H2 (gas) + O2 (gas) HCI (aq) – + Zn (sol) +
  • https://www.3cmediasolutions.org/privid/230335?key=6838d77941164cb5dd298a7a9e9bdc3b6f3ea3a0 Copy and past link shown above to answer the charts below.. Data for Reaction Mixture 1 (to confirm constanc…
  •  In a particular trace analysis via FTIR, a set of sixteen interferograms were collected. The signal-to-noise ratio (S/N) associated with a particular spectral peak was approximately 4:1. How …
  • If 10.0 grams of NaCl is dissolved in 100.0 mL of water what is the concentration in weight/volume percent? What is the molarity?
  • Compare instrumental design, materials used for the major parts of UV/Vis, FL, IR and Raman, the merits of each method in terms of selectivity, DL and detection range and precision.
  • ServoMed, Tewameter and Dermalab TEWL instruments are open chamber devices for measuring TEWL. 1. Discuss the principles behind the measurement of TEWL with these instruments. 2. List three important …
  • please answer in format of answer sheet and correct sig figs, thank you!. 5. (a) /6 (b) Step 1: Step 2: Step 3: (c) rate = (d). 5. Hydrazine is produced from ammonia and hypochlorite ion in basic solu…
  • please answer in format of answer sheet and correct sig figs, thank you!
  • DATA: Ruler height: 5.7 cm +/- 0.4cm Ruler diameter: 4.1 +/- 0.2cm  Buret measurements: Trial 1 Initial volume: 0.29 m/L Final volume: 23.39 m/L  Trial 2 Initial volume: 0.19 m/L Final volum…
  • please answer in format of answer sheet and correct sig figs. 1. (a) (b) (c) 17 (d) (e) (f ) (g). 1. The progress of a reaction from reactants to products is shown in the following diagram: Progress o…
  • What are the main types of fibers (main categories and subcategories)? Â 2. Define the following terms: fiber, yarn, fabric, isotropic, anisotropic, birefringence, spinning, and regenerated fiber….
  • 966 grams of an unknown hydrate of NaSO 4 are heated until reaching a constant mass of 426 grams. What is the empirical formula of the unknown hydrate of NaSO 4 ? Show your work.
  • Complete these questions please show all working. 2. Calculate the value of Eocen for the following reaction: 2Au(s) + 3Ca2+(aq) > 2Au3+(aq) + 3Ca(s) 3. Determine the equilibrium constant, Keq, at …
  • Please upload (use a pdf to embed the image ) your picture of the following problem to the appropriate significant digits . Show all work for full credit . This must be a single picture . 57 seconds =…
  • General chem lab Â. 10 25 tap (b) (c) Figure 1 Various types of pipets (pipettes) (a) 10 mL Mohr pipet, (b) 10 mL Serological pipet, and (c) 25 mL volumetric pipet https://welfarejambo.blogspot.com…
  • . The titration of a weak acid with a strong base is a common exercise in chemistry labs. We have looked at all of the individual types of calculations needed to determine the ph at any point of a t…
  • Need help with these if anyone can.. 10. A worker is exposed to 0.015 mg/m of beryllium dust for just 1 hour. What is the 8-hr. TWA? Would you consider this worker’s exposure to be safe? (1 pt) 11. A …
  • Need help with these if anyone can.. 6. If you plan to do a full shift personal sample {8hr}, what sampling rate must you use to obtain a total air volume of 12D!) L? (1 pt} T. You calihrated your sar…
  • A 5.0 L flask contains 2.0 moles of NaHCO 3 (s), 1.0 mole of Na 2 CO 3 (s), 1.9 x 10 -4Â moles of CO 2 (g), and 1.9 x 10 -4 moles of H 2 O (g) at chemical equilibrium. Â Â Â Â Â Â Â Â ?…
  • Remaining Time: 1 hour, 35 minutes, 06 seconds. Question Completion Status: QUESTION 2 10 points NaHCO3 decompose in NazCO3, CO2 and 20. In a close reactor, it has been found 3.0 mol of NaHCO3, 3.0 mo…
  • I need help to prepare this LAB. could you help me with calculations? I need help to prepare recipes for all solutions and dilutions for this experiment. the molar extinction coefficient of biphenyl i…
  • QUESTION 10 The following reaction is a redox process? SO2 + 12 + 2H20-> H2804 + 2HI O True O False Click Save and Submit to save and submit. Click Save All Answers to Type here to search. Question…
  • Please provide correct answers along with the explanations. C. What is the AGt for A – C? d. Calculate the value of [C]/[A] at 25 C for the overall reaction (A +> C).. e. Based on your calculati…
  • Question Completion Status: QUESTION 9 Which of the following compounds have the higher oxidation number for chromium? Cr203 FeCr204 CrBr3 Cr253 Cro3 D Cr03 CrBr3 FeCr204 Cr203. QUESTION 8 0.06 g of N…
  • How to you get the average volume difference in Table 3.7?
  • QUESTION 1 Â In a closed reactor, 28.00 g of N 2 and 3.23 g of H 2 are added and heated to produce ammonia. At the equilibrium, it was found that 5.11 g of NH 3 was formed. Â What is the value of th…
  • How to do question 3? I don’t know how to calculate the tolerance.. Appendix – Tolerances for Class A Volumetric Glassware at 20 .C Pipettes Capacity (ml) Tolerances (mL) 0.5 0.006 0.006 2 0.006 0.01 …
  • QUESTION 1 Â In a closed reactor, 28.00 g of N 2 and 3.23 g of H 2 are added and heated to produce ammonia. At the equilibrium, it was found that 5.11 g of NH 3 was formed. Â What is the value of…
  • Explain how knowing about Acids and Bases will help in a Nursing Career. Please provide citations.
  • Propose at least two ways to classify HPLC modes? 4. What are the main types of solute-stationary phase interactions that define column selectivity for C18 columns? 5. Based on your current knowled…
  • General chem lab    Â. DENSITY AND LAB TECHNIQUES OBJECTIVES: 0 Use the water displacement method to determine the density of an unknown metal. Determine the density of distilled water and se…
  • To study the hardness of water from different sources and to test the hardness of water
  • DO ALL FILL 15 QUESTIONS. 1). The species In’ is isoelectronic with what element 2). In a anions there are protons than electrons. 3). If T, <T, the reaction is said to be 4). When a number is chan…
  • What is the balanced chemical reaction of these? NaOH + KHP—– H2O + KNaP
  • . A 15.7-g aluminum block is warmed to 53.2 °C and plunged . into an insulated beaker containing 32.5 g of water initially at 24.5 °C. The aluminum and the water are allowed to come to thermal equ…
    • What is the pH of a solution prepared by combining 25.00 mL of 45.63 mM nicotinic acid (a.k.a. pyridine 3-carboxylic acid) with 60.00 mL of 18.07 mM sodium nicotinate?
  • The titration of a weak acid with a strong base is a common exercise in chemistry labs. We have looked at all of the individual types of calculations needed to determine the pH at any point of a titra…
  • Q1 Carbon dipyrrolemethenes’ s UV-Vis spectrum shows a strong absorption band at 493 nm (= 62500 cm -1 M -1 ) in water. A student added 6L of a stock Carbon dipyrrolemethenes solution with an unk…
  • Question 4. > > > k. put_in_pouch( ‘ doll’ ) > >> k. put_in_pouch( ‘ firetruck’ ) > > > k. put_in_pouch( ‘ kitten’ ) > > > k. pouch_contents( ) [ ‘doll’, ‘firetruck…
  • Directions: Write sentences about the STRUCTURE OF MATTER. Use each letter below to begin a sentence. The first letter (S) is done for you. Scientists learned that the basic building blocks of atoms a…
  • We have covered many topics in this course with potential applications in the real world and in your future career. Choose a topic we covered in this course and explain how that topic will apply to a …
  • Please Help Quickly, Thank you!!!  When NaHCO 3 completely decomposes, it can follow this balanced chemical equation: 2NaHCO 3 → Na 2 CO 3 + H 2 CO 3  Determine the theoretical yields of each pr…
  • Calculate the temperature at which the equilibrium constant…. For a certain chemical reaction, the standard Gibbs free energy of reaction is -86.4 kJ. Calculate the temperature at which the equilibr…
  • Explain how a physical property, such as boiling point, can help you distinguish one substance from another.
  • Why does the fat float on top of the water? Why do the light and extra light margarines have fewer calories per serving than regular margarine? How does regular margarine compare to butter in terms of…
  • . 2. (18 points) A 0.4321g mixture containing only silver nitrate (AgNO,, MW: 169,873 g/mol) and mercurous nitrate (Hgz(NO3)2, MW: 525.19 g/mol) was dissolved in water and treated with excess sodium…
  • Identify a suitable wavelength for analysis of Cu (2+) ions in aqueous solution. The radiant intensity of light is highest on the middle of the visible range, and falls off dramatically at long wav…
  • The decomposition of hydrogen iodide on finely divided gold at 150 C is zero order with respect to HI. The rate defined below is constant. Au 2 HI(g) -> H2(g) + 12(g) A[HI] Rate = = k = 1.20 x 10-4…
  • take for all Of the U.250 M HI to decompose? Given the following equilibrium equations, 2N20(g) = 2N2(g) + Oz(g) K1 = 8.3 x 1034 N204(g) = 2NO2(g) K2 = 4.6 x 10-3 2NO2(g) = N2(g) + 202(g) K3 = 5.9 x 1…
  • Please derived the rate law for the CVD deposition of Ge (surface reaction is believed to be rate limiting step): (1) Gas-phase dissociation: Gell4 (g) – GeCl2 (g) + Cl2 (g) (2) Adsorption: GeCl2(g) +…
  • In part c you used a physical property, the boiling point, to identify a liquid. Do you think that using a single physical property is a reliable way to identify a substance with certainty?
  • can i request for a good answer? thanks. Directions: Write sentences about the STRUCTURE OF MATTER. Use each letter below to begin a sentence. The first letter (S) is done for you. Scientists learned …
  • 3 copper blocks of equal masses are heated to different temperatures. These blocks are then dropped into 3 different beakers filled with equal amounts of water. What is the best estimate for the missi…
  • Please watch the video and help me in this, this video is the reference https://youtu.be/3nKFslvjrTU thankyou please watch it. INTRODUCTION – What are the differences between reducing and and non redu…
  • Watch the videos provided on the introduction website to observe and record your observations of each reaction. http://youtu.be/5UJTR-LA1z4 http://youtu.be/aaXaHLX0ATE ; http://youtu.be/Ta4Dom…
  • Three metal blocks of equal mass are placed in boiling water for several minutes. Each block is placed in a different insulated container with water in it. The equilibrium temperature for each sample …
  • Hello please help me in this and watch this video for the reference https://youtu.be/3nKFslvjrTU watch the video attached for the reference thankyou. INTRODUCTION – What are the differences between re…
  • Neon is located in the last group of the periodic table. How many valence electrons does the element neon have? 1 2 4 8  2. The table shows the total number of electrons in Atom A and Atom B. A…
  • Draw the structural formula for the following hydrocarbons. (4 marks) propane 2-butyne octane hexane 2. Name the following hydrocarbons. (4 marks) b. d . 3. Research and then design a laboratory se…
  • A photon emitted by an element has a wavelength of 649 nm. a. (3 points) What is the frequency of that photon in Hz? b. (3 points) What is the energy of that photon in J? 2. Use the Electromagn…
  • Help please!. At this point, identify at least 10 substances in your house, give their chemical name and chemical formula, and indicate their use. Substance Chemical Name Chemical Use Formula 10
  • please answer. ACTIVITY 3. Phase Change Directions: Referring to figure, describe any changes in the phases present when it is: (a) kept at 0 C while the pressure is increased from that at point 1 to …
  • Can someone summarize this article. Thank you! Â https://go.gale.com/ps/i.do?p=SCIC&u=mill30389&id=GALE|CX3058900126&v=2.1&it=r&sid=bookmark-SCIC&asid=…
  • Please answer.. ACTIVITY 3. Phase Change Directions: Referring to figure, describe any changes in the phases present when it is: (a) kept at 0 C while the pressure is increased from that at point 1 to…
  • Please answer.. Directions: Predict the intermolecular forces possible for a molecule. . 1. Arrange ethyl methyl ether (CH3OCH2CH3), 2-methylpropane [isobutane, (CH3)2CHCH3], and acetone (CH3COCH3) in…
  • Answer these questions please show working out also:Â Â Q1) ÂYou are required to prepare a 0.45% w/v sodium chloride solution by adding a diluent to a 1.8% w/v sodium chloride solution. Â What is …
  • Note the colour of the Ni2+ before development with dimethylgloxime. Record this data. Like the copper(II) ion, the nickel ion is not visible to the eye. To develop the nickel ion, while in the fume h…
  • You prepare a 4.73 M solution of sodium chloride, NaCl (table salt) to cook your pasta. Its density is 1.24 g/ml. At what temperature will it boil (assume that your kitchen is at sea level, and treat …
  • intrinsic and extrinsic conductivity in BaTiO3.  a) Assuming intrinsic behavior, plot in Arrhenius fashion the concentration of electrons in the conduction band, log ni vs inverse temperature (100…
  • What is the purpose of adding 10% hydroxylamine-hydrochloride solution in the ferrous ammonium sulfate solution? Write the pertinent reaction involved.
  • How would the experiment results be affected if the deionized water used in this experiment was contaminated with calcium, magnesium or other metal ions?
  • Part 1: Calculate the mass, in grams, of each of the following. You may round atomic masses to one decimal place. 1. 2.54 Âmol  CaCO3. Express your answer with the appropriate units. 2. 3.66×10−…
  • 6,7&8. Adding hydrochloric acid to a piece of blue litmus paper and seeing a color change is A evidence of a physical change. True 6 O False Question 7 (1.25 points) If a reaction mixture temperat…
  • 4&5 pls. X Est. Length: 2:00:00 Michael Lopez: Attempt 1 Page 1: Which of the following is NOT an indication of a chemical change? N 3 O evolution of a gas 4 all of these are indications of a chem…
  • . Activity #1: ENUMERATION Direction: List all the properties/ characteristics you observe in household. Sort the properties you listed and identify as physical or chemical property. hogging siluisa…
  • Explain the reaction between lodine solution and polysaccharides by giving the Structures of related compounds.
  • There are quite a few notable, historical figures that contributed to this field and, subsequently, what we know today about chemistry. Even further, the field of quantum mechanics now enables us to u…
  • Part 1: Balance the following equations. 1. K+O2→K2O2. Express your answer as a chemical equation.  2. Al2(SO4)3+BaCl2→BaSO4+AlCl3. Express your answer as a chemical equation.  3. F2+AlCl3→A…
  • Part 1: 1. Calculate the percent by mass of ÂN Âin ÂNaNO3. Express your answer as a percentage. Â 2. Calculate the percent by mass of ÂN Âin Â(NH4)2CO3. Express your answer as a percentage. Â …
  • . Question 3 The ‘H NMR spectrum of a 1.54 M aqueous solution of ZnCl2 showed two peaks with relative intensities 1: 4.74. Calculate the hydration number of the Zn2+ ion, given that Density of the s…
  • A strip of magnesium was placed into a conical flask with 2.50 M HCI and a rubber stopper and syringe were used to seal the container. The total volume of the equipment was 381 mL and the experiment w…
  • Part 1: 1. How many atoms of CC does the notation 5 Fe(CH3COO)3Fe(CH3COO)3 indicate? Express your answer as an integer. Â 2. How many atoms of ÂH Âdoes the notation 5 ÂFe(CH3COO)3 Âindicate? Expr…
  • Part 1: How many atoms of CC does the notation 5 Fe(CH3COO)3Fe(CH3COO)3 indicate? Express your answer as an integer. Â How many atoms of ÂH Âdoes the notation 5 ÂFe(CH3COO)3 Âindicate? Express yo…
  • How would I design an experiment to test how temperature affects rate of reaction using the following materials? (there is no need to use all of them). . Antacid tablets . Clear drinking glasses (or b…
  • can you answer this pleaseÂ. The volumes of a standard solution containing 2.50 ppm of Zn’t shown in the table were pipetted into separator funnels, each containing 10.00 mL of an unknown zinc soluti…
  • To complete this assignment start by watching the video below. https://www.youtube.com/watch?v=0Bt6RPP2ANI After watching the video, post two or three sentences answering the question. Â 1. Describe …
  • Hi I need help with this task please. b. Calculate the vapor pressure (in mm Hg) for a liquid mixture consisting of 252 g n-pentane (molecular weight = 72.0 g / mol) and 1400 g n-heptane (molecular we…
  • Directions: Read and analyze the problem carefully. Complete solution on a separate sheet Âpaper. Problem: Ideal gas principle is crucial in understanding the combustion of different fuels whic…
  • Hi I need help with this task please. Task 3 For an antibiotic, AZ6798-3, a solution formulated by the drug for injection is available so that it can be administered to critically ill patients. The fi…
  • Hi I need help with this task. For a liquid, the heat of vaporization, AHV, is given by the formula in J / mol; AH, = 5,65 . 104 – 41,9 . T where T indicates the temperature in degrees Kelvin. The sub…
  • . 1. INSTRUCTION: Select the correct answer for each of the following questions. Write your answer on a separate sheet of paper. 1. Kinetic-molecular theory makes several assumptions about. A….
  • HELP! having a hard time with this..Â. CHM 121: Stoichiometry and Analysis of an Antacid Trial 1 Trial 2 Trial 3 2.3 g 2.3 g 2.3 g a) Mass of NaHCOz used b) before reaction 161.5 g 159.9 g 159.5 g Ma…
  • A 2.50 g sample of fried potatoes is placed in a calorimeter with 500.0 g of water at an initial temperature of 21.0 degrees Celsius. After combustion of the fried potatoes, the water has a temperatur…
  • Why do solid water float in liquid water? When solid water forms, the bonds result in a very structure with unoccupied spaces, causing the solid to occupy a larger volume than the liquid. A. ionic…
  • . Predicted Predicted Expt’l Substance Formula Structure Bonds/Aen Solubility Polarity Expt’l Solubility Polarity P/NP? What should it (show ratio if What did it Show every bond Show work dissolve i…
  • . 18. You react together one mole of dicarboxylic acid with one mole of diamine to make a polymer (the monomers shown below). At the end of the reaction, there are 0.03 moles of total molecules in t…
  • What is the acceptable tablet diameter of an Etoricoxib tablet with a standard diameter of 14.2 mm?
  • The following energy diagram shows the energy change associated with the combustion of glucose in KJ mol" during cellular respiration. Reactants 181 KJ mor Energy 2997 k.J mol" Products…
  • /4 marks Q20. A student measured the heat of combustion of three different fuels using a spirit burner and a beaker of water. The results are shown in the Heat of table on the right. The published val…
  • . 9. Consider the following reaction of a base B with water: KB B + H2O HB* + OH KB = 5.3 x !0-10 Which of the following statements is true? A) B is a weak base. B) B is a strong base. C) HB* is the…
  • 12 mark Q15. In an experiment to determine the c (Ag+) in an aqueous solution of AgNO3, 20.0 mL of the solution is titrated with 0.095 M NaCl(aq) and 18.7 ml is required to reach the endpoint of the r…
  • Please show me the steps, thank you!. 13. A student weighs out 0.3333 g NazCO3, dissolves it completely in 30 mL of deionized water, and titrates the resulting solution with 0.100 M HCI. Calculate the…
  • . 12. Consider two acids HA and HB: Ka HA + HO + H:0+ Ka = 1.0 x 104 Ka HB + H20 B- + H30+ Ka = 2.0 x 10-8 Which of the following statements is/are true? (Note that there may be more than one correc…
  • I have try it myself I want to compare. Analysis 1. Use the data to calculate an average specific heat capacity for the warm water tested. Assume the specific heat capacity for the cold water is 4.10 …
  • A student weighs out 0.3333 g Na 2 CO 3 , dissolves it completely in 30 mL of deionized water, and titrates the resulting solution with 0.100 M HCl. Calculate the equivalence point volume expected for…
  • Which of the following changes would cause no change in the retention time for the ethanol peak in your gas chromatography experiment? (Note that there may be more than one correct answer.) Â ÂÂÂ?…
  • Is dissolving sugar in a cup of tea a physical or chemical change?
  • please pay attention to sig figs thank you. 271. mg of an unknown protein are dissolved in enough solvent to make 5.00 mL of solution. The osmotic pressure of this solution is measured to be 0.0445 at…
  • es Of Krypton and U.JU moles of helium are allowed to combine at a fixed pressure of 1 bar and a temperature of 298K. Calculate the change in entropy. 4. Use the following information to calculate the…
  • The task is to complete the questions in the problem set. Read each question carefully and identify given values. Be sure to show all formulas and calculations used to solve the problems. The answers …
  • Given below are disintegration values for uncoated tablets containing Levofloxacin 500 mg. Determine the average disintegration time and express your values in minutes. Does the batch pass or fail USP…
  • I am not sure how to solve. 5. For the reaction: C(graphite) > C (diamond) Use the following information to calculate a value of AGo at a temperature of 298.15 K, 1 bar and then again at a temperat…
  • Please, see attached. Â. B. Perform Dixon’s Q-test and Grubb’s test for the following set of data points. Make a conclusion to reject or retain the two extreme outliers. Show your calculations. See r…
  • Please, see attached. Â. A. Types of error. A group of students are doing an analysis of copper in 1-peso coin. They were tasked to prepare standard solutions and weigh the analyte as the end-product…
  • . Arrange these elements according to electron affinity. Most energy released by gaining an electron Most energy absorbed by gaining an electron Answer Bank Al Br Ar
  • write the following answers in scientific notation 1.) (.259 – .09643) / 13 2.) .1917 / 26.16
  • Use the conversion table to find the value and the units for the gas law constant, R, if the volume to be measured needs to be in cubic feet, the pressure in mm Hg, temperature in degrees Kelvin an…
  • A gas sample is at constant pressure. The gas occupies a volume of o.128 ft3 when the temperature is 531 R. Determine the temperature in Kelvin at which the volume of the gas is 3.42 L. (4 marks)
  • Calculate the API for an oil with a specific gravity of o.81. What is the density of this oil in pounds per cubic feet? (3 marks)
  • Find the AH of the following equation given the AH of the related reactions: CS2 (1) + 302 (g) CO2(g) + 2SO2(g). AH =? CS2 (1) AH = +87.9 kJ moll 1) C (s) + 2S (s). CO2(g) AH = -393.5 kJ mol-1 2)…
  • " www-awu.aleks.com A ALEKS – Jordan McZeal – Learn G molar mass of water . Google Search E CHEMICAL REACTIONS Limiting reactants 0/5 J Liquid octane (CH, (CH2 ) CH3 ) will react with gaseous oxy…
  • Calculate the mass of methane gas contained at 1000 psia and 79 F in a cylinder with a volume of 4.8 cu ft. Assume that methane is an ideal gas. (MW (1 = 16.04) Use the Ideal Gas Law Formula substi…
  • A 2.4 cu ft cylinder of ethane shows a pressure of 1600 psig at go F. What is the mass, in pounds, of the ethane contained in the cylinder? Assume the ethane is an ideal gas. (MW C2 = 30.08) (5 mar…
  • A patient was brought into Radiology with claims of a broken arm. His arm was x-rayed and the radiograph showed bright contrast (light area) through his radius bone with a break in contrast (dark area…
  • Hello, I need help with these questions, please? Â 1. Write the name & formulae for these compounds a. Â h2-1h13, combine the ions. h2 to h13 means take h2 cation and h-13 anions and write…
  • “The dehydrate was collected and sent for analysis by x-ray powder diffraction (XRD). After XRD analysis, the dehydrate was determined to be potassium sulfate.” Classify if thisÂconclusion is based o…
  • Is the combination of Na and Cl 2 to form NaCl a physical or chemical change?
  • Is 2D heteronuclear NMR spectroscopy considered a bond experiment and what advantages does this particular method offer?
  • – Un medicamento utiliza el compuesto 1 (PM 348) como principio activo, sin embargo se ha determinado que a temperaturas superiores a los 30’C comienza a detectarse la degradacion del compuesto 1 ge…
  • GENERAL CHEM HW  perform the following calculations to the correct number of significant figures  20) b.   Â1444.0+8.20+9.36 d.    592+9.0-54.347  21) a. (26.1202×2.53) +334.5…
  • need help figuring out pOH. What is the pOH for a solution which has a pH of 7.28?
  • need help figuring out with pOH. What is the pH for a solution which has a pOH of 3.99?
  • Discussions What type of chemical reactions is shown below? Grades rd People Pages Files ar Syllabus BigBlueButton Collaborations Google Drive Office 365 composition VidGrid Portal single replacement …
  • “An unknown mixture was separated by filtration into a solid and a filtrate.” A) “The filtrate was dehydrated and the dehydrate looked like sodium chloride.” Classify if this conclusion is based on …
  • D Question 5 1 pts What type of solute is dissolved in the water if when tested with an electric probe records a value of 6,975 micro Siemens / cm? O lonic O Molecular No answer text provided. No answ…
  • The leg bone from a California saber-toothed cat unearthed from one of the La Brea Tar Pits was found to contain 1/128 as much carbon-14 as the leg bone of a living cat. How long ago did the Californi…
  • write the balanced half-equations for the conversion of: i) S2O4 2- (aq) to SO3 2- (aq) ii) Mn2O3 (s) to MnO (s)
  • Make corrections to the questions that are marked wrong:. Prelab for Table III: Write the 3 steps for the net ionic equation for the reactions listed below. First one is done for you. Assume all react…
  • When you ran the model in which you could increase the charge on the ions, describe and explain the changes that occurred as the ionic charge increased  Slide 12 – Solvation of Ions  http://mw2.co…
  • D Question 11 1 pts You have a stock solution of 1.23 M copper II chloride. You are to prepare a 15.0 ml of 0.215 M diluted solution. How many milliliters of water and stock solution are needed to com…
  • Please show me the steps, thank you!. 3. Suppose that you take 0.5000 gram of NazCO, and titrate it with 0.115 M HCI solution. What is the equivalence point volume expected for the complete (i.e., met…
  • Is the highlighted answer correct? Can you redo the calculations so that they give the correct answer?. E) none of the above 500 g x 1 mole NazCO; x 1 mole HCI x 1L 105.99 1 mole 0.115
  • How many moles of argon, Ar, are in 1.77×1024ÂArÂatoms?
  • List one major similarity in the naming of ionic and molecular compounds. (2 pts)
  • Please fill out the following rows HW 7 (Vp, Vol, balance, Vp, vol, balance, other. All information is provided in the question there is no other reference or information needed.Â. representing the a…
  • Convert 1.71×1024Âatoms of carbon to moles ofÂcarbon.
  • How many FÂatoms are there in 1.51×1023Âmolecules of trifluoroacetic acid,ÂC2HF3O2?
  • How many grams of Na2CO3 are present in 18.5ÂmL of a solution that is 22.0%ÂNa2CO3 byÂmass? The density of the solution is 1.05Âg/mL.
  • An aqueous NaBr solution has a mass of 300.0Âg and contains 27.25Âg NaBr. Calculate the mass percent NaBr.
  • How many grams of a 19.4%Âsugar solution contain 34.5Âg ofÂsugar?
  • A sample of vegetable oil with density 907Âkg/m3 is found to have a mass of 0.0377Âkg. Find the volume of thisÂsample.
  • One “fusion” reaction considered to have a possibility as an eventual commercial energy source is  2 H+ 2 H→ 3 He+n. Calculate the energy released in this reaction in MeV per reaction and in Btu p…
  • A sample of metal has a mass of 16.31 g, and a volume of 6.81 mL. What is the density of this metal?
  • please pay attention to unit symbols and the significant figures thank you. accuracy matters so please double check your answer. Here is _ ph of the pressure of boron trifluoride (BF, ) in a reaction …
  • Nagkita-kita ang magkakaibigang Pao, Ronnel 36 . __ Josh, at Ray John sa paaralan. 37. . __Malapit na tayong bigyan ng pagsusulit. Ang UP, Ateneo, at UST ang ilang Unibersidad na nang…
  • When you ran the model in which you could increase the polarity of the solvent, describe and explain the changes that occurred as the polarity of the solvent increased.
  • Preview File Edit View Go Toois Window Help . F: . SunFebZO 10:50PM . V New Labs (NomenclaturemRledf r e 1 of 2 7 Edited Complete the tables below by providing the missing information. Use capitalizat…
  • Preview File Edit View Go Tools Window Help O E O Q 8 Sun Feb 20 10:50 PM New Labs (Nomenclature) RR2.pdf Page 1 of 2 – Edited Search A O Ev Aa v New Labs (Nomenclature) R… Complete the tables below…
  • Describe what happens to positive and negative ions as they dissolve in water, that is, once they are no longer in the crystal, what surrounds them?
  • DISCUSSION Your discussion should include the following elements, developed in paragraphs (full sentences) (½ to 1 page): • Presentation of the main results for the substances studied (real molarit…
  • Lab 6: Specific Heats and Calorimetry General Chemistry I – Prof. Martinez Solid + solution Solution + solution Part 2: Determining specific heat capacity of a liquid Table 3. Specific heat capacity r…
  • A 10.0-mL sample of alcohol is pipetted into a flask with stopper. The mass is found by difference to be 7.899 g. Refer to Example Exercise 1 and calculate the density of the liquid. 5. A rubber st…
  • . Given the information from the literature about substituted azobenzene, sketch the expected absorbance spectra (Abs vs wavelength) before (one graph) and after (another graph) the flash. Q) 1; yo…
  • Given the following reaction: Ca ( OH ) 2 + H 2 SO 4 → CaSO 4 +2 H 2 O If you start with 6.0 g of Ca ( OH ) 2 and 7.0 g of H 2 SO 4 , Determine the number of moles of H 2 O produced ?…
  • The rate of Â31.61 meters per second is equal to _____ ft/min.
  • Draw a picture that represents what happens to both salt and sugar after they are dissolved in water.
  • . What’s New Teenage years give us unfamiliar feelings and put us in situations that form our personal qualities. Activity 1: Complete the box by interviewing 5 people and ask them to give 5 emotion…
  • Question 25 How many electrons can an atom potentially hold in its first two shells? Explain why electrons are distributed in shells around a nucleus. Also, describe how the number of electrons in eac…
  • Using an appropriate chemistry reference book, look up and record the solubility of potassium alum in cold and hot water. Always cite your sources! b. Considering the solubility of potassium alu…
  • Calculate the work associated with a system when its volume is compressed from 97 L to 39.9 L against a constant pressure of 1.08 bar. Express your final answer in J.
    • Potassium permanganate is used as an antiseptic and fungicide
    • Potassium dichromate is used for the conversion of alcohols into other organic compounds.
  • . If 5.40 mol of CH , reacts with excess O2, how many moles of CO, will be produced by the following combustion reaction? C5H12 + 802 – 6H20 + 5 CO2 moles of CO, : mol
  • Sulfuryl chloride undergoes first-order decomposition at 320.ºC with a half-life of 8.75 h (k = 2.20 × 10 -5 s -1 ). SO 2 Cl 2 (g) → SO 2 (g) + Cl 2 (g)  If the initial pressure of SO 2 Cl 2 is …
  • Â Â 2. Â Â 3. Â Â. The safe dosage of the IV antibiotic ceftriaxone for children weighing more than 2.0 kg is 60. mg per kilogram of body weight. Suppose a pediatric nurse has available 1.5 L…
  • show steps on how we get the answers please ?. Standardization of HCI Volume of HCI Initial Volume Final Volume Titrant Volume [HCI] [M] (mL) (m L) (m L) 20.00mL 0 25.70 25.70 0.1225 0 25.00 25.00 0.1…
  • In Quality of sites, Is the internet site considered high quality of site, medium quality of site or low quality of site? Why?
  • can you please show steps on how to get each answer?. Molar Mass of (KHP) (g) 204.2236 (KHP) Titration Mass of KHP Initial Volume Final Volume Titrant Volume NaOH [M] Indicator (g) (mL) (m L) (mL) use…
  • What is the specific heat capacity of a substance of mass 166.2 g that increases in temperature from 20.1°C to 27.7°C after absorbing 2.36 kJ of energy in the form of heat? Express your answer i…
  • Please help me with this question. I am gettingt two different answers. Thank you!!. Consider the following reaction where Kc = 83.3 at 500 K. PCI3(9) + Cl2(9) -PCIs(9) A reaction mixture was found to…
  • From the calibration curve that you plotted above, calculate the absorbance at a concentration of 7.0e-5 (or 0.00007) M. Record your answer for the y-variable to 2 decimal places. Hint: Solve for “y”….
  • In quality of internet sites, Is the internet site considered high quality of site, medium quality of site, or low quality of site? Why?
  • The different chemical reactions presented in this module are encountered every single day. If you bake, you may have observed that every time baking soda is used, an acidic ingredient (buttermilk, fo…
  • 79 g of Fe 2 O 3 (159.7 g/mol) reacts with 2.906 g CO (28.01 g/mol) to form Fe (55.85 g/mol) and CO 2 (44.01 g/mol). What is the theoretical mass (in g) of Fe produced? Fe 2 O 3 + 3 CO → 2 Fe + 3…
  • said the codes where 99282 and diagnosis N89.8 and there where wrong. Your diagnosis code states it is a “specified” disorder. You can’t code it as specified unless they specify what disorder it i…
  • please double check your answers and look at the required sig figs thank you. Here Is u youph of the pressure of ethylene (C, HA) In a reaction vessel during a certain chemical reaction. Use this grap…
  • Fill in the blanks. ACID OR HOUSEHOLD ITEM PH BASE CH+] [OH ] Vinegar Soda Water Ammonia Bleach
  • How do I do this?. Solve the concentration problem. Show your work as best you can for partial credit. Round to the nearest tenth. You need to make 100 mL of a 0.2 molar sucrose (C12H22011) solution. …
  • The task is to complete the questions in the problem set. Read each question carefully and identify given values. Be sure to show all formulas and calculations used to solve the problems. Answers shou…
  • How do I do this?0. Solve the concentration problem. Show your work as best you can for partial credit. Round to the nearest tenth. If you want to make 50 mL of a 15% glucose solution, how many grams …
  • How do I do this?. Which tools would you use to most accurately measure: a) 5-1000 UL, b) 1-5 mL, and c) 10-100 mL Answer in the form of: a ) _ _ ___, b ) _ _, & c )_ _ _ _. Edit View Insert Forma…
  • Rank the following compounds in order of increasing polarity: H H H H H H F F CI CI 2 3
  • Cuales se disuelven en tetracloruro de carbono y cual en etanol C6H6 C2H6O H2O LiBr
  • 99 g of V 2 O 5 (181.9 g/mol) reacts with 1.558 g H 2 (2.016 g/mol) to form V 2 O 3 (149.9 g/mol) and H 2 O (18.02 g/mol). What is the theoretical mass (in g) of V 2 O 3 produced? V 2 O 5 + 2 H 2 ?…
  • How do I do this?. Show your work as best you can for partial credit." Round to the nearest tenth. Calculate the molecular weight for sucrose (C12H22011).
  • A medication is administered at a rate of 1.5 per kg of body weight. How many milligrams would be needed for a 45 year old child
  • How many grams of C will be consumed when 5.00 grams of NazSO4 react according to the balanced reaction shown? The molar mass of NazSO4 is 142.06 g/mole and the molar mass of carbon is 12 g/mole.
  • Briefly describe one way how waves are used in each of the following Industry Medicine Navigation
  • When you push down on a block resting on a table, block atoms and table atoms that are in contact with one another
  • Write the electron configuration for each ion: Co2+Co2+ N3−N3− Ca2+Ca2+ Express your answers in condensed forms in the order of orbital filling as strings without blank space between orbitals sepa…
  • Also the moles of ammonia titrated. Mass of complex in flask 1 0.1234.g Volume of HCI added to flask 1 25 cm Concentration of HCl added to 1.112 x 10 mol dm flask 1 Moles of HCI added to flask 1 2.730…
  • Finally, recalling that 20.4 g of ashes were initially used to prepare the basic solution, what is the effective molar mass of ashes?
  • (g)is the question at bottom here is the observation data it will hepl to solve. Question (g) Based on your observations and results, design your own redox table. 8 Marks SCH4U – Spontaneity of redox …
  • pressure of a sample of 45 L of gas is increased and the gas from 100 kPa. What is the final volume of the gas
  • Convert the following recommendations for supplements over to mass or moles. You have 1.45 moles of Vitamin C (C 6 H 8 O 6 ). Convert moles to mg to determine if it matches the NIH’s daily recommendat…
  • please pay attention to sig figs and units please. Here Is v ph of the pressure of lodine (I, ) In a reaction vessel during a certain chemical reaction, Use this graph to answer the questions in the t…
  • 99 g of V 2 O 5 (181.9 g/mol) reacts with 1.558 g H 2 (2.016 g/mol) to form V 2 O 3 (149.9 g/mol) and H 2 O (18.02 g/mol). What is the theoretical mass (in g) of V 2 O 3 produced?
  • please answer this asap! thank you!!. V 400 300 – energy C + D 200 (k]/mol) A + B 100 reaction coordinate Use the energy diagram to answer these questions. What is the heat of reaction? KJ/mol Exother…
  • An underground reservoir contains natural gas at a pressure of 425 kPa and a temperature of 15 degrees Celsius. If the volume of the reservoir is 1.3×10^4 kL, what volume would the gas occupy of it we…
  • . Which statement is fa/se? Multiple Choice 0 Fission occurs among the heaviest isotopes, whereas fusion occurs more readily for light isotopes. The mass defect (Am) for a fission reaction is negati…
  • 1-For the following reaction: A(g) ⇌ 2 B(g) Given the following information, what is the equilibrium pressure of B in bar? Initial pressure of A = 1.219 bar Initial pressure of B = 0 bar K = 7.7 x 1…
  • . find your answer. The pressure above a pure sample of solid Substance X at – 180. C is lowered. At what pressure will the sample sublime? Use the phase diagram of X below to 1.2- solid pressure (a…
  • . 8) Consider the following reaction: 2503(g) – 2502(g) + Oz(g) K = 3.33 x 10-5 at 700 kelvins. a) A sealed reactor is charged with 10.00 bar of SO3(g). Calculate the equilibrium partial pressures o…
  • El hexafloruro de uranio(UF6) es un gas en condiciones normales, por lo que se han aprovechado las diferentes velocidades de difisión de los dos tipos de UF6 que se obtienen de los isotopos del urani…
  • second row is incorrect please help. Here is V ph of the pressure of sulfur dioxide (SO, ) In a reaction vessel during a certain chemical reaction. Use this graph to answer the questions in the table …
  • A volume of 22 Litres of air is chilled from 80 degrees Celsius to -25 degrees Celsius. What is the final volume this of air?
  • . 7) Here are two chemical reactions with their equilibrium constants: Reaction Temperature 2NH3(g) – Nz(g) + 3Hz(g) 400 C 6.1 x 103 Hz(g) + 12(g) – 2HI(g) 400 C 50. Calculate the equilibrium consta…
  • An unknown sample has a mass of 13.9 g and a volume of 17.4 mL. What is its density (g/mL)? (a) 0.799 (b) 1.04 (c) 3.16 (d) 4.62 (e) 5.07 7. Which of the following is a heterogeneous mixture? (a) m…
  • How I am able to determine molecular polarity on the basis of molecular shape? Give 3 examples.
  • Calculate the amount of heat needed to boil 79.5g of water (H2O), beginning from a temperature of 97.0°C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol.
  • . journal project – Goog X M Inbox – wofsmileys22 x CengageBrain – Login x Honors Chem 2021-2 X HC-U5 Bal Eq, Predicti X HC U6: Stoich, L.R. & I – – C O webassign.net web/ Student/ Assignment-Re…
  • The half-life of 14 C is 5730 yr. Assuming some charcoal from a campfire 29,000 years old was found, what fraction of the original C-14 would remain today?
  • How do I do this?. Solve the concentration problem. Show your work as best you can for partial credit. Round to the nearest tenth. How many grams of NaBr are required to prepare 100 mL of a 0.75 M sol…
  • How do I do this?. Solve the concentration problem. Show your work as best you can for partial credit. Round to the nearest tenth. There are 258 g of MgCl2/liter. What is the molarity of the solution?
  • How do I do this?. Solve the concentration problem. Show your work as best you can for partial credit. Round to the nearest tenth. How many grams are NaCl are required to prepare 200 mL of a 3.10 M so…
  • How do I do this?. Solve the concentration problem. Show your work as best you can for partial credit. Round to the nearest tenth. 150 mL of 54% CaCl2 solution contains how many grams of CaCl2?
  • What is the reason that a beaker of water in a room would boil at something less the 100°c?
  • . Balance the following reaction: (remember to include any 1’s on appropriate compounds) C2H402 + 02 CO2 + H20 Show your work:. Balance the following reaction: (remember to include any 1’s on approp…
  • Homework Problem: Prepare an alum pC-pH diagram at 279 K and room temperature (293 K). Use the following chemical equilibrium expressions for room temperature conditions. ÂÂÂÂÂÂÂÂÂÂÂÂÂ?…
  • Some measurements of the initial rate of a certain reaction are given in the table below. [N2] [H2 ] initial rate of reaction 1.26M 0.407M 9.00 x 10′ MIS 5.64 M 0.407M 1.80 x 10′ MIS 1.26M 1.07M 2.37 …
  • How do I do this?. Convert -12 C to OF. Write your answer in the form of ___ oF (due to Canvas formatting). Round to the nearest tenth.
  • A gas made up of atoms escapes through a pinhole 1.18 times as fast as N2 gas. Write the chemical formula of the gas.
  • If a solution is made by mixing 20 mL of 0.6M NaCH 3 COO and 30 mLCH 3 COOH calculate the pH for acetic acid, Ka= 1.76*10 -5
  • What volume is occupied by 29.2 gg of argon gas at a pressure of 1.01 atm and a temperature of 345 KK ? Would the volume be different if the sample were 29.2 gg of helium  A weather balloon is infla…
  • When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are: Fe Â( s ) + HCl Â( aq )Â FeCl 2 Â( aq ) + H 2 Â( g ) When…
  • . 1. A gas cylinder contains a mixture of methane (CH4) and ethane (Csz) gases. If the partial pressure of methane is 13.333 atm and the partial pressure of ethane is 2.22 atm, What is the total pre…
  • How do I do this?. Solve the concentration problem. Show your work as best you can for partial credit. Round to the nearest tenth. How many grams of NaCl are required to prepare 60 mL of a 19% solutio…
  • How do I do this?. Solve the concentration problem. Show your work as best you can for partial credit. Round to the nearest tenth. How do you make 340 mL of a 4 M solution from a 20 M stock solution? …
  • 7) Using the calibration equation and the absorbance you measured for the prepared sample , calculate the ferroin concentration Show your work and don’t forget to include units . 0.329 = 12328 [ferroi…
  • The energy, wavelength, and frequency of an emitted photon are all related to the size of the electronic transition (high → low energy levels) occurring in the metal cation. Based on your observat…
  • . Use the phase diagram of Substance X below to find the boiling point of X when the pressure on the liquid is 5.2 atm. 12 solid pressure (atm) liquid gas 200 temperature (K) Note: your answer must …
  • . M3LE6 Hand-In Assignment: Potential Energy Diagrams In this assignment, you will use a Potential Energy Diagram on a chemical reaction to determine the activation energy, the enthalpy change and i…
  • please answer my question. 2. 4-bromo-4-methyl-2-hexene exhibits 2 types of stereoisomerism. Br H3C-CH=CH-C-CH2 CH3 CH3 a) Name the type of stereoisomerism b) Draw each pair of stereoisomers and label…
  • Question 9 5 pts Copper has two naturally occurring isotopes. The isotope Cu-63 (mass = 62.93amu) makes up 69.17% of the sample, and the isotope Cu-65 (mass = 64.98amu) makes up 30.83% of the sample. …
  • Calculate the amount of heat needed to melt 119.g of ice (H2O) and bring it to a temperature of 38.2°C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol.
  • . For the reaction 2 HCI(aq) + K2SO3(s) = HO(1) + SO2(g) + 2 KCI(aq) answer the following questions. 1. If you added less than the amount needed in question 1 of potassium sulfite, what would be …
  • . This graph shows how the vapor pressure of three liquids varies with temperature: 800 700- 600 vapor pressure, torr 500 400. 300 200 – ethylbenzene – octane – ispbutyl alcohol 100 110 120 130 140 …
  • For the following reaction, 23.1 grams of iron are allowed to react with 25.2 grams of hydrochloric acid . iron ( s ) + hydrochloric acid ( aq ) -> iron(II) chloride ( aq ) + hydrogen ( g ) What is…
  • . This graph shows how the vapor pressure of three liquids varies with temperature: 900 800 t 2 E :I 0′) U) E D. h ….. O 3 hylbenzene 100 i «butyl alcohol 0 r…- 100 110 120 1.30 140 temperature…
  • please pay attention to unit symbol and sig figs. Here Is _ youph of the pressure of sulfur dioxide (SO, ) in a reaction vessel during a certain chemical reaction. Use this graph to answer the questio…
  • This week, consider the following terms: Absolute zero Atmosphere Barometer Diffusion Pressure Calorie Energy Enthalpy Heat System Work   Choose at least 2 terms from the list, and answer the foll…
  • . journal project – Good X M Inbox – wb/smileys22 x CengageBrain – Logir x "> Honors Chem 2021-2 x "> PC-US Bal Eq, Predict X HC U6: Stoich, LR &1 x + C O webassign.net web Stude…
  • This week, consider the following terms: Absolute zero Atmosphere Barometer Diffusion Pressure Calorie Energy Enthalpy Heat System Work  Respond to the following in a minimum of 175 words: Choose at…
  • Homework 3 Due: 02/23/2021 1) Balance the following chemical reactions [15 points] N2 + H2 – NH, Na + HCI – NaCl + H2 CH4 + 02 – CO2 + H2O C3Hs + 02 – H20 + CO2 C6H1206 + 02 – CO2+ H2O 2) Calculate th…
  • Another first-order reaction also has a rate constant of 2.40×10−2s−1 at 23 ∘C. What is the value of k at 50 ∘C if E 2 = 123 kJ/mol ?
  • A certain first-order reaction has a rate constant of 2.40×10−2s−1 at 23 ∘C. What is the value of k at 50 ∘C if Ea = 81.5 kJ/mol ? Express your answer in reciprocal seconds to three significa…
  • At a certain temperature this reaction follows second-order kinetics with a rate constant of 0.0107M 2803 (8) – 2802 (8) + 02 (8) Suppose a vessel contains SO, at a concentration of 0.490M. Calculate …
  • The concentration of glycerin in a water solution by application of heat is? In the choice of a solvent for gas absorption, one of the properties to be considered is that the solvent should?
  • . Do the following dimensional analysis conversion. a. 15m to dm b. 20.0m to ft c. 1.5in to m d. 125mL to L e. 100.0cm to yd f. 0.30kg to mg g. 12.64qt to L h. 3.5lbs to g i. 789 ft to m j. 1.253kg to…
  • this is for my assignment. 1. By referring to the compound below COOH y X CH2CH2CI Z C-H O a) Draw the compound into skeletal and expanded structure. b) Identify the class of carbon X, Y and Z. c) On …
  • Life cycle impact assessment: (5 %) Include the following and any other relevant information A balanced material flow diagram for each alternative. Perform the LCA and provide CO2 emission in Tabular …
  • Â 3. Â. Decide whether each proposed multiplication or division of measurements is possible. If it is possible, write the result in the last column of the table. proposed Is this multiplicatio…
  • Directions and equations: Â Â Â Â. 3. (0.75 pts) If you obtained a Claussen Kosher Dill Pickle Spear weighing exactly 28.0000 g at the start of part A successfully extracting all the sodium chl…
  • An Accelerating Hockey Puck A hockey puck having a mass of 0.30 kg slides on the frictionless, horizontal surface of an ice rink. Two hockey sticks strike the puck simultaneously, exerting the forces …
  • . This graph shows how the vapor pressure of three liquids varies with temperature: 900- 800 600. vapor pressure, torr 500 200 – piperidine – pyrrole – orthoxylene 110 120 130 140 temperature, C Use…
    • Extraction of Salt from Pickle and Preparation of Pickle Solution for Analysis 1. One partner should obtain one spear from the bottle. Be sure to copy down the information on the nutri…
  • How to find the valence electrons from these molecular formulas. Sible 32 Hr Br Molecular # Val Formula electrora Diagram CO. C O COCI 24 HON H C
  • How to draw the lewis diagram from these molecular formulas. Molecular # Val Lewis Formula electrora Diagram H. CO 12 H C H NH CH CI. 20 FCI C CIE H T CF. C 19 OF 20 F_O F
  • I need help with both parts in 2 and also 3. Also dont bother looking at the gray boxs just look at the words it will help you better.. journal project – Googl X M Inbox – wbfsmileys22 CengageBrain – …
  • I’m not understanding how 0.457g was obtained in part b. Could you please explain how Anthony got to this number and show the calculations for it?. a. AgN O,=0.10M=0.10mol 1 1 M- mol -= mol=M X L L 50…
    • State the type of covalent bond cleavage involved in the formation of carbocation below. Give 2 reason for your answer. CH3 H H,C-CH-C+ + Br H CHa H carbocation X HaC-C-C- HaC H CHq H HaC- C-C-H + …
  • Can you make a conclusion about this lab?. Experiment 14: SHAPES AND POLARITIES OF COVALENT MOLECULES Introduction: Covalent bonding is the sharing of electrons between two atoms. Ionic bonding is the…
  • Equations and steps: Â Â Â Â Â. 3. (0.75 pts) If you obtained a Claussen Kosher Dill Pickle Spear weighing exactly 28.0000 g at the start of part A successfully extracting all the sodium chloride…
  • Exercise where density is a conversion factor: • An aluminum sphere has a mass of 3.83 g. Calculate the diameter of the sphere. The density of aluminium is 2.70 g/cm^3.  (a) Calculate the volu…
  • Calculate the amount of heat needed to melt 119.g of ice (H2O) and bring it to a temperature of 38.2°C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. Â…
  • Equations and steps:Â Â Â Â. 3. (0.75 pts) If you obtained a Claussen Kosher Dill Pickle Spear weighing exactly 28.0000 g at the start of part A successfully extracting all the sodium chloride …
  • What is the formula for calcium nitrite? Â Â Â What is the formula for barium sulfite? Â Â Â What is the formula for potassium acetate? Â Â Â What is the name of the compound with the formula…
  • Simple Ionic Compounds Rb3P BeO BaCl2 AlF 3 MgSe CSI SrS GaAs Mg3N2 LiBr Ionic Compounds that contain Transition Metals PtBr2 ZnS V205 MnI2 K3As Hgo VO2 Ag3P CoF 3 Au2S Cr203 NiCl2 PtS2 Case CaF2 CoBr…
  • Ag2S HCN H3PO3 Zn(C2H302)2 NH NO3 CS2 Hg2Br2 Ca(Mn04)2 NH 3 SANA Li202 HFO3 I2 Cl6 CIF 5 HF Cd(OH) 2 HBrO3 ICI CrPO4 CuHSO3 H2O2 HFO
  • Hydrochloric acid Mercury (II) sulfide Mercury (I) carbonate Mercury (I) choride Barium permanganate Sodium bicarbonate Iron (III) sulfate Perfluoric acid Aluminum phosphate Potassium peroxid…
  • HNO2 HCN H2S HIO HBr H2Cr04 HBrO4 HC2H302 H2CO3 HCIO2 HC104 HNO 3 HCIO 3 HBro HCI HI H2Se
  • . Use the phase diagram of Substance X below to find the pressure at which the boiling point of X is 228. .C. 0.8- pressure (atm) 0.4- liquid solid gas 200 400 600 temperature (K) Note: your answer …
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  • An unknown sample of a soluble sulfate weighing 1.8000 g yielded 0.9000 g of BaS04. Calculate the percentage of sulfur in the unknown. 3. Calculate the equivalent amounts of each and the percentage…
  • If the concentration of the prepared stock solution of silver nitrate provided in this lab is exactly 0.1500 M, and if a 0.1000 g of pure sodium chloride is used in step A1, what volume of silver …
  • please pay attention to sig figs thank you. Here is ph of the pressure of oxygen (O, ) in a reaction vessel during a certain chemical reaction. Use this graph to answer the questions in the table belo…
  • At a certain temperature this reaction follows second-order kinetics with a rate constant of 0.28M ‘s 2N205 (8) – 2N204 (8) +02 (8) Suppose a vessel contains NO at a concentration of 1.50M. Calculate …
  • Exam questions: 1. opinical I somores. = Examples + diagram 2. Heremay Chirality + Example 3. Chirality why is it Important in pharmacy company digram + Examples . "
  • If the concentration of the prepared stock solution of silver nitrate provided in this lab is exactly 0.1500 M, and if a 0.1000 g of pure sodium chloride is used in step A1, what volume of silver…
  • General chem question also in the shade blue no work needed just answerÂ. <MyLab and Mastering_Chapter 1 Matter, Measurement, Exercise 1.86 – Enhanced – with Feedback < 20 of 29 Review | Co…
  • Soil that is already depleted of its nutrients needs fertilizer. One of the nutrients needed to replenish the soil is Nitrogen. If your father is a farmer, which among these fertilizers would you reco…
  • please help me solve number 115 part b and cÂ. X 119. B 782 CHAPTER 17 Acids and Bases ea 113. Calculate the concentration of all species in a 0.500 M solution M a. of H2SO3. C. MISSED THIS? Read Sec…
  • 4-bromo-4-methyl-2-hexene exhibits 2 types of stereoisomerism. Br HaC-CH=CH-C-CH2 CH3 CH3 a) Name the type of stereoisomerism b) Draw each pair of stereoisomers and label the stereoisomerism. c) St…
  • What is the formula for iron(III) iodide ? Â Â What is the formula for cobalt(II) sulfide ? Â Â What is the formula for nickel(II) bromide ? ÂÂ Â What is the name of the compound with the formu…
  • . joumal project – Good * M Inbox – whismileys22 x CengageBrain – Logir x * *. Honors Chem 2021- x > HC-US Bal Eq, Predicti X C U6: Stoich, LR. & 1 C Q webassign.net web Student Assign ment-R…
  • 1 a-What is the formula for nitrogen dioxide ? Â b-What is the formula for boron trichloride ? Â c-What is the formula for sulfur dichloride ? Â 2-What is the name of the compound with the formula …
  • write the formulas for the following ionic compounds.. Example Compound Name Compoun Example Compound d Formula Compound Name Formula 1. Lithium fluoride 21. Strontium carbonate 2. Sodium dihydrogen p…
  • . journal project – Good X M Inbox – wbfsmileys22 X CengageBrain – Login "Honors Chem 2021-2 x HC-U5 Bal Eq. Predic X . HC U6: Stoich, L.R, & I CO I webassign.net web student Assigri Respon…
  • Explain completely: pO2 electrode pH electrodes pCO2 electrode
  • For this unit’s discussion, please choose one major mineral that is of importance to your case study athlete’s nutritional status and athletic performance. Then, address the following topics: Functi…
  • At a certain temperature the rate of this reaction is second order in H, CO, with a rate constant of 25.1 M -1.5 – 1 H2 CO3 (aq) – H2O (aq) + CO2 (aq) Suppose a vessel contains H, CO, at a concentrati…
  • MnCl 36. potassium sulfide 14. CuBr 37. nickel(II) nitride 15. NiF2 38. aluminum iodide 16. Co;N2 39. tin(IV) sulfide 17. Case 40. tin(II) chloride 18. Rb S 41. vanadium(V) bromide 19. BaO 42. cal…
  • Mg Ca 3. Circula la parte (o partes) aproximada de la tabla periodica donde los siguientes elementos aparecen: (6 pts) a. Elementos con el valor mas pequeno de Energia de lonizacion. b. Elementos con …
  • Ionic compounds Name the compound or insert the formula for the ionic compound as appropriate. Example Compound Example Compound Formula Compound Name Compound Name Formula 1. KI 24. iron(III) chlorid…
  • Pages File Edit Insert Format Arrange View Share Window Help D Q g Sun Feb 20 6:46 PM Atomic Structure Data Sheet SUM21 (1) – Edited 93% v + T EB A View Zoom Add Page Insert Table Chart Text Shape Med…
  • Pages File Edit Insert Format Arrange View Share Window Help D Q g Sun Feb 20 6:45 PM Atomic Structure Data Sheet SUM21 (1) – Edited 100% + T A View Zoom Add Page Insert Table Chart Text Shape Media C…
  • The kinetics of a chemical reaction were studied. The initial absorbance reading (t = 0 secs) was 1.20 and the subsequent absorbance readings every 3 secs were 0.889, 0.659, 0.488, 0.361, 0.268, 0.198…
  • Fill in the names and formulas for ions and compounds as appropriate. Compoun Cation Formula and Anion Formula and Compound Name d Formula name name Example NaCl Na’, sodium ion Cl, chloride ion sodiu…
  • Ca 2. For each neutral element below, specific the number of CORE electrons and VALENCE electrons. (5pts) CORE e- VALENCE e- F B S Mg Ca 3. Circula la parte (o partes) aproximada de la tabla period…
  • Identify the chemical property:  When heated with oxygen, magnesium changes from a shiny metal to a white solid that no longer conducts electricity   Water boils at 100ºC   Carbon dioxide d…
  • I just need help figuring out the other stuff on here. Btw the initial concentration of CrO4^2- is just .0024. REPORT SHEET EXPERIMENT Determination of the 25 Solubility-Product Constant for a Sparing…
  • A Moving to another question will save this response. uestion 12 What volume would a container need to be to hold 0.750 mol of neon at 5.00 atm at 325 K? (R = 0.0820574 L*atm/(mol*K)) 100. atm
    • Write the ground state electron configuration for each element below: (2.5 pts) i. F ii. B iii. S iv. Mg v. Ca
  • A Moving to another question will save this response. uestion 12 What volume would a container need to be to hold 0.750 mol of neon at 5.00 atm at 325 K? (R = 0.0820574 L*atm/(mol*K)) 100. atm 4.00 at…
  • Question 10 (1 point) Where in the periodic table are the elements with the greatest electronegativity? The right-most column (the Nobel gasses) The left side The right side, but not the Nobel gasses….
    • Provide the possible values for the other three quantum numbers for electrons in n = 3. (6 pts) Possible Values m ms f. How many total electrons can fit in the 3p subshell (where n = 3, 1 = 1)? (1….
  • . 3. Reaction Rates & Equilibrium: Some proteins must dimerize to form a physiologically active complex, 2P 9 P2, but some of these dimers dissociate before being active, P2 9 2P, resulting in a…
  • 1 and 2 please. Selected Essay Analysis – Goo. D Question 1 1 pts (Q75) The fastest reaction rate will always be the: Initial rate Average rate Instantaneous rate Final rate Product induced rate D Que…
  • Devise an analytical flow chart that will be used to separate these substances from a urine specimen. The separation will be liquid extraction methods. Choose appropriate solvents and reagents based o…
  • Can you please show the steps used to arrive at the answer? Thank you!. 7. Which of the following changes would cause the ethanol peak in your gas chromatography experiment to have a shorter retention…
  • The illustration to the left represents a mixture of nitrogen ( blue ) and oxygen ( red ) molecules. If the molecules in the above illustration react to form NO2 according to the equation N2 + 2 02 – …
  • The reaction, A à B+C is known to be zero order with respect to reactant A and to have a rate constant of 8.00 x 10 -3 M/s at 30⁰C. Calculate the concentration of A after 4.00 minutes have elaps…
  • According to the following reaction, how many grams of aluminum sulfate will be formed upon the complete reaction of 33.0 grams of sulfuric acid with excess aluminum oxide? aluminum oxide (5) + sulfur…
  • A reaction that is zeroth order in reactant B has an initial rate of 2.0 M/s when the [B] 0 = 6.0 M. What is a reasonable initial rate for this reaction when the [B] 0 is 12.0 M? 1.0 M/s 2.0 M/s 3….
  • What is Boyle’s law? State the definition of the law in words. What are the assumptions of Boyle’s law? Write at least one mathematical equation that represents the law. What can be calculated with Bo…
  • Detailed answers for chemical reactions _ch_9 Â Â Â Question 1: identify the following reaction type (all that apply). 12O 2Â +Â 8Al 2 S 3 Â –> 8Al 2 O 3 Â + 3S 8 Â Answer 1: In this react…
  • . journal project – Goog X M Inbox – wbfsmileys22 X CengageBrain – My Fr Honors Chem 2021-2 " HC-US Bal Eq. Predict HC U6: Stoich, L.R, & I CO webassign.net web/ Student/ Assignment-Respons…
  • Chemical reactions Question 1: identify the following reaction type (all that apply – there are 3). 12O 2Â +Â 8Al 2 S 3 Â –> 8Al 2 O 3 Â + 3S 8 Question 2: you should have noted that the react…
  • Solutions Answers 1a. To increase the rate of solution formation when a solute is a solid think of increasing the surface area by subdividing or breaking up the solid. Â Â Â You will also want to i…
  • Calculate the concentration of all solute species in each of the following solutions of acids or bases. Assume that the ionization of water can be neglected and show that the change in the initial con…
  • . journal project – Goog X M Inbox – wbfsmileys22 X CengageBrain – My Hr X Honors Chem 2021-2 X " HC-US Bal Eq, Predict x HC U6: Stoich, LR, & 1 C 0 webassign.net/web/ Student/ Assignment-R…
  • If you have a solid solute dissolving in a liquid solvent: a) Name the 3 things that will increase the RATE of solution formation. b) What are the 2 things you change for the reaction conditions if…
  • 8:54 0 0 0 57 EX Assignment Instruction: Read and analyze each problem. Show your solutions for each item by submitting an image/screenshot of your computations. ROUND-OFF YOUR ANSWERS TO 2 DECIMAL PL…
  • . journal project – Googl X M Inbox – wbfsmileys22 x CengageBrain – My Ho x Honors Chem 2021-2 x A, HC-US Bal Eq, Predicti X " HC U6: Stoich, LR & I X – > C 0 webassign.net/web/Student/A…
  • CuSO4 is used for application in synthetic fibre, painting, etc. Cus04(aq) reacts with NaOH (aq), as shown below: CuSO4(aq) + 2NaOH(aq) -> Cu(OH)2 + 2NazSO4(aq) A 100.00 mL sample of 0.200 mol/L Cu…
  • https://phet.colorado.edu/sims/html/projectile-motion/latest/projectile-motion_en.html. Table Trials Angle (deg) R (m) Y max (m) Time (s) 25 2 30 45 60 65 90. Instructions 3. Set the projectile to be …
  • Specific Heat 6. Determine the temperature change created in 30.0 of solid gold by the addition of the same amount of heat as calculated in #5. 7. Explain why the temperature change for gold is so dif…
  • . d. The liquid’s viscosity is low. 4. (10 points) Ethanol has a heat of vaporization of 38.56 kJ/mol and a normal boiling point of 78.4 .C. What is the vapor pressure (in torr) of ethanol at 15 .C?…
  • Lab Day – Lab Time Determinations: Report initial and final melting point Data Table I: Melting point Determinations: R Benzoic acid (DA) published value is 121-122 " Initial mp 3 Final me Commer…
  • Task ———————- – Make a story and include the requirements in it – ÂI want a story not a page of answers to that questions on it   Requirements ————————— This story…
  • ÂGiven the following drugs in a urine specimen: Cocaine alkaloid Secobarbital (a derivative of barbituric acid) Carisoprodol (a neutral drug) ÂÂÂÂ Devise an analytical flow chart that will be …
  • Each time you dumped the pennies, one half-life passed; it has been shown that the half-life for this radioactive isotope is 20 years. In the year 2000, an archaeology team unearthed pottery and is us…
  • If you allow the now mixed solution to sit for say 10min, will the colors separate back out into a rainbow? Why or why not?
  • Write the balanced chemical equation for the reaction in which steel wool (iron) is held in a Bunsen burner flame. Include the states ofÂmatter.
  • . Which of the following is the correct electron-dot structure for C2F4? A F-C-C-F F B :F-C=C-F: :F: F: C D F : :=0: E F= C =C=F
  • Hello there! I will provide some context following my question. So the question is : What parameters could we control better to ensure a better uniformity of the loading of the capsules by the pro-fil…
  • I need help with all of both 5 and 6.. journal project – Good x M Inbox – whismileys22 CengageBrain – My F X Honors Chem 2021-2 x FC-US Bal Eq. Predict HC U6: Stoich, L.R. & I > CO it webassign…
  • Hi there! I will provide some context following my question. So the question is : What parameters could we control better to ensure a better uniformity of the loading of the capsules by the pro-filler…
  • Write the ionic and net ionic equation for the single replacement (redox) reaction between zinc and copper(II) sulfate? Identify the species that is oxidized and the species that is reduced.  2…
  • Task ———————- – Make a story and include the requirements in it – Also make sure to write a story and add the requirements in the story somehow – ÂI want a story not a page of answers t…
  • Unit Factor(s) used Calculation: To make up 750. mL of a 1.87 M sucrose solution, how many grams of sucrose (Mm = 342.30 g/mol) are needed? To have 435 g of sucrose (Mm = 342.30 g/mol), how many mL of…
  • Run 1 Run 2 Run 3 Run 4 Run 5 Run 6 Run 7 Run 8 Vol vinegar, mL 0 5 10 15 20 25 30 35 Vol water, ml 35 30 25 20 15 10 5 0 Weight of beaker and & solution, g Weight of Alka Seltzer@ tablet, g Weigh…
  • You have 50.0mL of 0.235M NH3. Kb = 1.8×10-5 What is the pH of this solution  2) Determine the pH when 7.0 mL of 0.42 mol/L LiOH is added to 15 mL of 0.5 mol/L HI  3 ) Acetic acid reacts wi…
  • Â Â 3. Â Â 4. Â Â. Multiplication and division of measurements Decide whether each proposed multiplication or division of measurements is possible. If it is possible, write the result in t…
  • "In our bodies, sugar is broken down with oxygen to produce water and carbon dioxide." According to the following reaction, how many grams of carbon dioxide will be formed upon the complete …
  • An element has 4 neutrons, 3 electrons and 4 protons. Which element does this describe? Is it a neutral atom, isotope, or an ion? What is the mass number? What is the net charge?
  • need help figuring out equilibrium equations Â. Consider the following balanced reaction: 2 A (s) + 4 B (aq) – -> 2 C(1) + 1D(g) When writing the equilibrium expression, what is the exponent for…
  • Need help figuring out equilibrium equationsÂ. Consider the following balanced reaction. 1 N4604 (8)–> 46 N (g) + 40(8) When writing the equilibrium expression, what is the exponent for O (g)? No…
  • Which of the following compounds, when dissolved in water, will produce a solution that will conduct electricity?
  • please and thank you. QUESTION 19 The masses of oxygen that combine with ig of nitrogen are 1 0 12 2 28/and 2 355. Use these data to show that the law of multiple proportions is satisfied Attach File …
  • . A 0.550 m aqueous solution of KBr has a total mass of 69.0 g. What masses of solute and solvent are present? M :I m. A solution is made by mixing equal masses of methanol, CHAO, and ethanol, C, HO…
  • QUESTION 19 The masses of oxygen that combine with 1g of nitrogen are/ 1/12 2 28/and 2 855/ Use these data to show that the law of multiple proportions is satisfied, Attach File Browse Lede…
  • please answer the following questions clearly for example question 1 the answer is ….. Â Question 1 Question 2 Question 3 Â Question 4 Â Question 5 Question 6 Â Â. Arrange these gases in order …
  • Write out a procedure for identifying an alkaline earth unknown using the minimum number of steps! Check this with your TA before using your data to identify your unknown cation. Write out a procedure…
    • PHASE CHANGE D. Wong’s assistant made the observations below while heating a sample of solid hydrogen. Using the data and observations in the table below, create a heating curve for hydrogen that…
  • please answer the following questions clearly for example question 1 the answer is ….. Â Question 1 Question 2Â Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 Questio…
  • Use the following information to answer question 6 2A(s) + 4 BC(aq) – 2AC2(aq) + 2B2(8) AH1 = +70.4 kJ AD(s) + 2 BC(aq) – AC2(aq) + B2D() AH2 = +8.3 kJ B2(8) + 5 D2(8) – B2D(1) AH3 = +22.7 kJ 6. Showi…
  • . 1. a) Estimate the enthalpy change for the reactions between hydrogen and the halogens, fluorine and chlorine: H2(g) + X2(g) —> 2 HX(g) where X = F or Cl b) Based on your findings, explain wh…
  • How much rotational kinetic energy in joules is there in a disk of radius 0.2 meters and mass 76 kg rotating at 1000 turns per second? Give your answer in joules.
  • How many grams of citric acid are contained in this 5.00 mL solution of citric acid if the molar mass of citric acid is 192 g/mol?
    •   2) Calculate the molar enthalpy change and entropy change for vaporization of water at 100°C and 95°C. Relate your answers to what you know about the spontaneity of this phase change at t…
  • Â 2. Â Â 3. Â Â 4. Â. Setting up the math for a two-step quantitative problem A gram of gasoline produces 45.0 kJ of energy when burned. Gasoline has a density of 0.77 g/mL. How would you cal…
  • How to calculate the heat capacity if 3.00kj is applied to 150g of an unknown liquid causing the temperature to increase from 16.50 degrees Celsius to 24.37 degrees Celsius?
  • Does specific heat capacity increase or decrease across a period in the periodic table? why?
  •  How much of a 200 mg/L stock solution of cocaine hydrochloride needs to be added to make 5 mls of a 1.5 mg/L calibration solution?  2. An immunoassay is compared with a GC/MS assay. Calculate…
  • I just paid $25 for this website and there are no answers on here???
  • . Extension Questions X Question 1 For each molecular shape, identify the number of bonds around the central atom and the number of lone pairs around the central atom. Bonds Around t Lone Por Molecu…
  • The atomic notation for a particular atom is represented as . Which of the following best identifies this atom? Group of answer choices Cd 48 64 48 112 Â Ca 48 64 48 112 Â Ca 64 48 64 112 Â Cd 64 4…
  • The mass of a glass cylinder is 133.86 g. When a volume of an unknown liquid with a density of 0.956 g/mL was placed in the cylinder, the mass increases to 210.83 g. What is the volume of the liquid? …
  • . 9. This question is about ethane and ethene. a) Calculate the C-C bond enthalpy in ethane, C2H6, given the following information: 2 C(g) + 6 H(g) > C2H6(g); AH = -2820 kJ mol-1 and E(C-H) = 412…
  • Calculate the average percent acetic acid in vinegar using titrations #2 and #3.
  • . An Accelerating Hockey Puck A hockey puck having a mass of 0.30 kg slides on the frictionless, horizontal surface of an ice rink. Two hockey sticks strike the puck simultaneously, exerting the for…
  • For question 2a, would the answer be 38.91 due to rounding up? This calculation would throw off part b when determining the % error.
  • Calculate the moles and the mass of solute in each of the following solutions (a) 150.0mL of 0.245 M CaCl2 (b) 1450 mL of 0.00187 M H2sO4
  • During an experiment in the Chemistry Lab I had the following data measured for sucrose concentration of an unknown solution. a solution of 0.25M weighted 47.624 grams of sucrose (first trial) a solut…
  • PRELAB 1. Solid iron reacts with chlorine gas to give solid iron(III) chloride. Write a balanced chemical equation for this chemical reaction. Include the physical state of each substance. (10 points)…
  • Question 3: Which of the compounds has this lowest boiling point and therefore begins to distill first (we will refer to this compound as Compound 1)? (steps 8-10) Question 4: What is this compound (w…
  • Discussion Topic This week we are learning about Gases in Chapter 11. As you have probably noticed, gases are all around us. The gas laws are active in our every day lives. Please describe a situation…
  • For the first-order reaction ½N 2 O 4 (g) → NO 2 (g); ∆H = 28.6 kJ the activation energy is 53.7 kJ/mol. What is the activation energy for the reverse reaction?
  • Calculate the number of moles in 100.0 g of each of the following compounds  (a) SO (b) Na2SO4
  • . MISSED THIS? Watch KGVSQ ME 8.? Read Section 8.4. You can otrck. on the Review link to access the section in your eTexf. For the reaction shown, calculate how marry grams of each product form when…
  • Derive the Henderson-Hasselbalch equation from the law of mass action.
  • Task ———————- – Write a half page story describing the “Tungsten” Element Â(When your finish the requirements that done) – Also make sure to write a story and add the requirements in th…
  • A(n) 7.45−mol sample of carbon monoxide was stored in a 30.0−L container at 47.6°C. What is the pressure of the carbon monoxide in the container?
  • . MISSED THIS? Watch KCV 8.2; Read Section 8.3. 1.8 mol N205 You can click on the Review link to access the section in your e Text. Express your answer using two significant figures. For the reactio…
  • At what temperature will 3.50 mol of He fill a3.00−L container at standard pressure?
  • Question 1 (1 point) I’ve taken 236 mLs of acetic acid with a concentration of 0.734 mol/L and mixed it with 244 mLs of sodium acetate with a concetration of 0.936 mol/L. To this solution, I add …
  • . MISSED THIS? Watch KCV 8.2, Read Section 8.3. You Which of the following best represents the amount of H2S required to completely react with all of can click on the Review link to access the secti…
  • Indicate which of the following are exact numbers The mass of a paper clip The surface area of a 10 ngwee The number grams in a kilogram
  • Calculate the number of mol of helium in a 2.06−L balloon at 32°C and 2.06 atm of pressure
  • . A certain first-order reaction has a rate constant of 2.40 x 10 2s at 25 .C. What is the value of & at 60 C if Ea = 77.5 kJ/mol ? Express your answer in reciprocal seconds to three significant…
  • (6 pts) Van’t Hoff Equation The Van’t Hoff equation is often used in thermodynamics to show the equilibrium constant K dependence on temperature T. AH AS In K = + R (1) RT Using Eqn. 1 determine th…
  • At what temperature is the rate constant 10 times as large as the rate constant at 35 °C if the activation energy is 87.8 kJ?
  • Make a scientific argument of the following scenario: “Lab Scenario” Assume you work at Beverage Company as the product engineer in charge of quality control for the new Power energy drink. You mus…
  • Part A Balance the chemical reaction equation P4(s)+Cl2(g)→PCl5(g)P4(s)+Cl2(g)→PCl5(g) Enter the coefficients in order, separated by commas (e.g., 1,2,3). Part A Answer: 1,10,4   Correct The…
  • (First section): Adding 1 mL of .25 M Na 3 PO 4 to the 1 mL of .25 M Ca(NO3) 2 caused a foaming reaction, with the solution becoming cloudy and filled with solid particulates. As 1.0 M HCl was added t…
  • 3 attempts left Check my work Be sure to answer all parts. Calculate the formula weight and molar mass of the following biologically active compound. CigH16CINO2S (Plavix), a drug used to treat corona…
  • Given the following, calculate the number of moles: a.6.78 g of lithium hydroxide, LiOH b.43 g of glucose, C6H120H 2. Determine the number of atoms in 0.467g of sulphuric acid, H2504. 3.a. The perce…
  • A sample of helium gas has a volume of1.30 Lat175 Kand4.00 atm. When the gas is compressed to0.283 Lat40.0 atm, the temperature increases markedly. What is the final temperature? Â Â Â Â Â Â Â …
  • Reaction 1: Precipitation Equilibrium 3 Cal+(aq) + 2 P043-(aq) = Cas(PO4)2(s) 1. Place about 1 ml (20 drops) of 0.25 M Ca (NO;)2 into a small test tube. 2. Add 1 ml of 0.25 M NayPO, and stir well. You…
  • Â 3. Â 4. Â. Deducing the ions in a polyatomic ionic compound from its.. V Complete the table below by writing the symbols for the cation and anion that make up each ionic compound. The first…
  • A sample of oxygen, at 24°C, occupies a volume of4.86 × 10 2 milliliters (mL) at 1.49 atm pressure.What pressure must be applied to compress the gas to a volume of1.92×10 2 mL, with no temperature …
  • Instructions: Answer the following questions and submit using the text entry box. 1. Describe a galvanic cell. 2. In order to balance a half-reaction, the number of positive and negative charges must …
  • Atropine is given to patients who have dangerously slow heart rates. ÂThe initial dosage is 0.5mg/kg. ÂThe package for Atropine is a 5mL vial that contains 1.0mg/mL. ÂA patient who weighs 264.1poun…
  • please help me solve problems 5 b, 6 a-b, 12 a and b, 13, and 14. The answer for 5 b) is iron (II) nitrate will have a higher pH, 6 a) is 3.79 6 b) is 2.58, 12 a) is 1.6 x 10^9, b) 2.4 …
  • Pre-lab Questions a. Rewrite the complete generic (R groups) acetal formation reaction found in the background section substituting the R H H H group with an actual alkyl substituent (e.g. use isop…
  • A sample of oxygen gas has a volume of 3.22 L at27° C. What volume will it occupy at 183°F if the pressure and number of mol are constant?
  • Be sure to answer all parts. Calculate the formula weight and molar mass of CHg6 (vitamin C) amu, g/mol
  • Calculate the activation energy if the rate constant at 80 °C is 5 times as large as the rate constant at 20 °C.
  • PLEASE PROVIDE A DETAILED EXPLANATION OF HOW THE ANSWER WAS FOUND. PROVIDING UNIT CONVERSION WHEN NEEDED. Answers need to match one of the multiple-choice answers.
  • What is the purpose of adding a catalyst to an equilibrium system? Select one: O To increase the amount of products. O To decrease the time it takes to reach equilibrium. O All of the above are correc…
  • Need help on these questions, thank you. What effect does the enzyme triosephosphate isomerase have on ed the system? Select one: O Decreases the time taken to reach equilibrium – thus increasing the …
  • Â A student wishes to set up an electrolytic cell to plate copper onto a belt buckle. Predict the length of time it will take to plate out 2.5 g of copper from a copper(II) nitrate solution using a…
  • Write the ionic and net ionic equation for the single replacement (redox) reaction between zinc and copper(II) sulfate? Identify the species that is oxidized and the species that is reduced. Â Â2…
  • Define stoichiometry and explain how it relates to the law of conservation of mass?  2. What is a limiting reagent? When and how is it determined?  3. Balance the following chemical equatio…
  • Give the expected laboratory findings for the following conditions {pH, pCO 2 , and total CO 2 ) Respiratory acidosis Metabolic acidosis Respiratory alakalosis Metabolic alkalosis compensating respira…
  • . Type: MT Title: Units 1) For 2 points, match (indicate) the names of all the variables with the identity the units. a. Specific Heat = b. Mass = 0. Temperature = d. Heat = Type: 8 Title: Sth Water…
  • . (1) (a) If you are told that the molar volume of water is 18.0 cm3 mol’1 and the partial molar volume of water (in a solution of water and ethanol) is 16.0 cm3 mol’l, explain clearly what the two …
  • hsity of a Cube X + connect.mheducation.com 85 G Sign in DENSITY . DENSITY OF A PLASTIC CUBE SUBMI INTRODUCTION LABORATORY SIMULATION Lab Data – X PHASE 3: Length of the cube and its volume (caliper m…
  • . | Downloads Home Share View C Liv Is Trying To Decide Which Mc x Welcome to Student Portal x Gradebook x Chemistry – Density of a Cube * + X C https://newconnect.mheducation.com Sign in … DENSIT…
  • Calculate the mols in 3.0×10^-3 g of amino acid glycine, c2h5NO2
    • Analytical Methods for Determining Acid-Base Balance • pH Electrode  Calibration: Usually calibrated with buffer solutions that bracket pH of the sample (Normal 7.35-7.45) – Calibrators, buffer…
  • Someone already answered it it is from chm112 part one. I need to to step by step of this chart I mean the calculation. Trial 1 Trial 2 Mass of K3Fe(CN)6 0.6060 g 0.6200 g Molar mass of K3Fe(CN)6 329….
  • . (10 points) How much heat (in kJ) is required to convert 55.4 grams of ice at 0.00.C to water at 75.0.C? (The specific heat (ice) = 2.10 J/g"C ; specific heat (water) = 4.18 J/g*C ; specific …
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  • Percentage exercise, in mass: -A penny coin was made of 95% copper and 5% by mass until 1982. How many grams of copper are in a coin whose mass is 3.26 g? How many grams of zinc are in the coin? ?…
  • Please helpÂ. Question 27 1 Point Identify the element associated with the following electron configurations. 152 252 2p6 352 3p6 4s2 3d5 Use the editor to format your answer Question 28 1 Point Iden…
  • e sure to answer all parts. Calculate the formula weight and molar mass of Al,(SO,): (aluminum sulfate), once used as a aluminu common antiperspirant. amu, g/mol
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  • Identify the major functions of sodium, chloride, bicarbonate, and potassium. List disease processes in which hyperchloremia and hypochloremia occur but sodium is normal.
  • When 2.0 mol of CO 2 is heated at a constant pressure of 1.25 atm, its temperature increases from 280.00 K to 307.00 K. The heat ( q ) absorbed during this process is determined to be 2.0 kJ. Calculat…
  • The National Institute of health (NIH) provides dietary recommendations for adults over various supplements. Convert the following recommendations for supplements over to mass or moles. The NIH recomm…
  • The observation data is given it will help to solve Here is the prdection and procedure may it helps you. Observations: Reaction Reactant A Reactant B Ca (NO3)zaq) Mg Metal -No clour changes NR – Ivei…
  • Please help ( Professor does not want us to use Avogadro’s number ). Phys Ebook Pt Periodic Table BAN FAU – Academic Cal. Reading [Review Topics] [References] Use the References to access important va…
  • Determine the [OH−] of a solution that is 0.110 MM in CO3^2−
  • If we prepare a 0.001M solution, how much mM is this?
  • Use Equation 1 to calculate the mean position along the meter stick where you grabbed it. Report your answer in cm . 38.9 cm
  • Please help.Â. C learning.rasmussen.edu/ultra/courses/_110044_1/grades/assessment/_11129874_1/overview/attempt/_24708896_1?courseld=_110044_1 Calculate the average atomic mass for the following isoto…
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  • 10.5 gg C 12 H 22 O 11 n(C 12 H 22 O 11 )= Q. 29.5 kg C 2 H 4 n(C 2 H 4 ) Q. 22.4 gg of nitrogen dioxide n( nitrogen dioxide)
  • Please help. Assignment/takeCovalentActivity.do/locator-assignment NeuroPhys Ebook Pt Periodic Table FAU – Academic Cal. Reading list [Review Topics] [References] Use the References to access importan…
  • Please help. Phys Ebook Pt Periodic Table FAU – Academic Cal. Reading list [Review Topics] [References] Use the References to access important values if needed for this question. ? For the following r…
  • Please help. ment/takeCovalentActivity.do?locator=assignment-take uroPhys Ebook Pt Periodic Table GO FAU – Academic Cal.. Re [Review Topics] [References] Use the References to access important values …
  • Please help. t/takeCovalentActivity.do?locator=assignment-take ys Ebook Pt Periodic Table FAU – Academic Cal. R [Review Topics] [References] Use the References to access important values if needed for…
  • PLEASE PROVIDE A DETAILED EXPLANATION OF HOW THE ANSWER WAS FOUND. PROVIDING UNIT CONVERSION WHEN NEEDED. Â. Question 1 Given the thermodynamic data below, which is the numerical value of AG for th…
  • Please help. (Review Topics] [References] Use the References to access important values if needed for this question. req 2req The illustration to the left represents a mixture of nitrogen ( blue ) and…
  • Can you make a conclusion about this experiment?. Experiment 14: SHAPES AND POLARITIES OF COVALENT MOLECULES Introduction: Covalent bonding is the sharing of electrons between two atoms. Ionic bonding…
  • PART 1. Please explain elaborately the answer below for the activity 1 and 2. There is an answer below. Answer:  PART 2.  PART 3. Explain elaborately and clear what is asked below. Â. Activ…
  • What is the molecular mass of sulfuric acid, H2SO4? Â What is the molar mass of oxygen gas? Â A synthesis produced 16.25 g of NH3 from 16.90 g of N2. What is the theoretical yield and the percent yi…
  • Question 3 (15 marks) The reaction rate coefficient at 298 K of the reaction OH + CHF3 – CF3 + HO is 2.8 x 10-36 cm’ molecule s. Given that the Boltzmann constant, ky = 1.381 x 10-25 J K-. Assume mole…
  • Consider the same reaction: 4As(s) + 3O2 (g) ĺ 2As2 O3 (s) Suppose we start a reaction with 5.2 mol of As and 6.0 mol of O2 ? Which reactant is in excess?
  • Data Analysis Base on your titration curve, read the volume of NaOH Âand pH at the equivalence point (the midpoint of the vertical section of the curve) mLof NaOH at equivalence point: ______…
  • XY, -X+Yz The equation above represents the decomposition of a compound XY, . The diagram below shows two reaction profiles (path one and path two) for the decomposition of XY, . Path One 100 kXm…
  • how to do the calculations for Bromination of Acetone Experiment
  • . Choose the most likely pattern for the crystal field diagram for the complex trans-[Ni(NH3)2(CN)4]2-, where CN- produces a much stronger crystal field than does NH3. BbibepuTe OANH OTBET: O a. O b…
  • what is the total ionic equation and net ionic equation for “potassium iodide + Barium chloride”? Also, what type of aqueous reaction is this? Thank you.
  • Titration Curve of Acid Introduction This lab is a continuous of last week’s lab: Unknown Acid Problem. ÂHere are the possible acids that you will get. In this lab, you will titrate a weak acid, ob…
  • . C Liv Is Trying To Decide Which M- X Welcome to Student Portal X Content Pi C B https://newconnect.mheducation.com PHOTOSYNTHESIS . DETERMINING RATE IN WHITE LIGHT INTRODUCTION LABORATORY SIMULATI…
  • The oxidation of glucose in the mitochondria of energy-hungry brain cells leads to the formation of pyruvate ions, which are then decarboxylated to ethanal (acetaldehyde, CH3CHO) in the course of the …
  • 3A 4A 5A 6A 7A He Be B IN F Ne Na Mg 3B 48 58 6B 7B 8B 1 18 2B Si S CI Ar K Cal SC Ti Cr Mn Fe Co Ni Cu 2n Ga Ge As Se Br Kr Rb Sr Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te Xe Cs Ba La Hf Ta R…
  • be As Sel Br Kr no Sry Zr Nb Mo TC Ru Rh Pd Ag Cd In Sn Sb Te Ke Cs Ba La Hf Ta W Re Os Ir Pt Au Hg T1 Pb Bi Po At Rn Fr Ra Ac Rf Ha Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U INp Pu…
  • 8 gg H2CCl2H2CCl2 Express your answer with the appropriate units. n(H2CCl2)n(H2CCl2) =
  • Fr Ra Ac | Rf Ha Ce Pr Nd Pm Sm Eu Go Tb Dy Ho Er Tm Yb LU Th Pa U Np Pu Am Cm BK Cf Es Fm Md No Lr Write the complete electron configuration for the scandium atom. Using NOBLE GAS notation…
  • Cs Ba La Hf Ta W Re Os Ir Pt Au Ag 11 PD| BI| Po At An Fr Ra Ac Rf Ha Cel Pr |Nd Pm Sm EU Gd Tb Dy Ho Er Tm Yb | Lu Th Pa U Np Pu Am Cm| BK Cf Es Fm Md No Lr Write the complete electron con…
  • . 13. A 39 kg block of ice at -3.0 ‘C is dropped into a pond, causing the temperature of the pond to decrease from 4.0 ‘C to 3.0 C. Determine the volume of the pond before the ice was added. Data: C…
  • Please try to help me ASAP, Please Do not Copy and paste from the internet that I can do free please try to answer those three question as soon as you can. Thank you.. FeSCN2+ HW Calculations page(s):…
  • . Ammonia and oxygen react to form nitrogen and water, like this: 4NH3 (g)+ 302 (g) – 2N2 (g)+6H20(g) Suppose a mixture of NH3, O,, N, and H, O has come to equilibrium in a closed reaction vessel. P…
  • . 1. A chemist titrates 20.0 mL of 0.20 M HBrO (see Appendix) with 0.10 M NaOH. What is the pH: a) before any base id added? b) when [HBro] = [Bro-]? c) at equivalence point? d) when the amount (mol…
  • Plot pH on the y-axis and mL of NaOH on the Âx-axis. You can use some software (recommend Microsoft Excel) to plot or plot it manually on a graph paper. If you do use excel, seeÂthis link to lear…
  • . Activity 3 Organizing Ideas Directions: List down details and the main idea that support biases used in the written text using the "detail organizer" below. Write the main idea inside th…
  • . 1. Pressure is applied to a sample of ice at -20 ‘C starting at 1 bar of pressure stopping at 100 bar. The density of water can be taken to be 0.920 g/cm at this temperature. What is the change in…
  • Can you explain how to get this? The question is: how many moles of Fe^3 are present in the solution at equilibrium?. . 7.00 mL of 4.00 X10- in Fe ( No3)3 ( 4.00 times 10 in the minus 3 rd power, MI F…
  • It is from chm112 standardized and titration of solution experiment 26 part 2. Part II. Bleach Analysis mass go : mass gow solution 1:42. 379 9 1. 52. 573 CIO + 2 S2032- = $4062- + CI 2: 43. 953 9 2. …
  • Part I. standardization of NazS 203 2 Fe(CN)63- + 2 S2032- = $4062- + 2 Fe(CN)64- Trial 1 Trial 2 Mass of K3Fe(CN)6 0. 6060 9 0. 62009 Molar mass of K3Fe(CN)6 329 . 24 0 / mol Mols of K3Fe(CN)6 Final …
  • Crystal Growth Project – Part 1 Â The prelab must include Experimental Protocol, Chemical Table and Equipment Table. The lab report requires all sections (including prelab sections) to be completed i…
  • The Ksp of Ni(CN)2 is 3.0 × 10−23. What is the molar solubility of Ni(CN)2 in a 0.065 M KCN solution? Answer in units of mol/L.
  • Is heating corn syrup a physical or chemical change? Explain your answer.
  • acid base reaction. 255 SUN tall B/s 101 39 9:54 2. For each of the reactions demonstrated, write down the balanced chemical reactions involved. a. Acid base reaction – O ETHICS SATURDAY b. Cata…
  • . 13:04 serie equlibre 3 forces . . . Equilibre d’un solide soumis a trois forces Exercicel Une branche d’arbre de masse m = 50 kg, arrachee par le vent est venue a = 30′ s’accrocher a un cable a mi…
  • . Question 3 (1 point) Combustion of coal releases sulfur dioxide into the atmosphere. The following process converts this gas into sulfuric acid, a component of acid rain. 2SO2(8) + 02(8) – 2503(8)…
  • . In the laboratory you dissolve 18.6 g of cobalt(II) fluoride in a volumetric flask and add water to a total volume of 125 mL. What is the molarity of the solution? M. What is the concentration of …
  • . needed for this question. In the laboratory you dilute 4.00 ml of a concentrated 12.0 M hydroiodic acid solution to a total volume of 75.0 mL. What is the concentration of the dilute solution? M S…
  • How are the column efficiency in a GC separation affected by the carrier gas flow? 2. The fatty acids in the triglycerides are derivatized to methyl esters before separation. Why not just hydrolyze…
  • . Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. Write the net ionic equation for the following molecular equation. Fel3(aq) + Na3P04(aq) ->FePO4(S) + 3NaI(…
  • . Use the References to access important values IT How many grams of PbBr will precipitate when excess FeBr, solution is added to 60.0 ml of 0.535 M Pb(NO3)2 solution? Pb(NO3)2(aq) + FeBr2(aq) ->…
  • . What volume of a 0.185 M calcium hydroxide solution is required to neutralize 16.0 mL of a 0.400 M hydroiodic acid solution? mL calcium hydroxide Submit Answer Retry Entire Group 4 more group atte…
  • H&C CH3 CH3 CH3 HaC H3C CH3 HaC Sample Structure (3 pts) Name (2 pts) Rationalization (2 pts)
  • The answer like this one: Â Please revised the rationalization and name it: Â. VOLTE 175B/s 8 72 14:28 content://org.telegram.n 5 . . . CLICK HERE TO GET MORE FREE SOLUTIONS : Solution :: Given A qu…
  • . Be sure to specify states such as (aq) or (s). If a box is not needed leave it blank. If no reaction occurs leave all boxes blank and click on "Submit". Write a net ionic equation for th…
  • The fatty acids in the triglycerides are derivatized to methyl esters before separation. Why not just hydrolyze the triglycerides and separate the free fatty acids instead?
  • structions : Submissions Professor Lolita Carbon has assigned the analysis of unknown hydrocarbon samples to Enteng Mabutingting based on their reaction profile. The summary of the observed reactions …
  • . structions : Submissions Professor Lolita Carbon has assigned the analysis of unknown hydrocarbon samples to Enteng Mabutingting based on their reaction profile. The summary of the observed reacti…
  • How are retention factors in a GC separation affected by the salvage gas flow? 2. How are the retention times in a GC separation affected by the salvage gas flow? Unsaturated fatty acids can exist …
  • How are the bottom numbers in a GC separation affected by the salvage gas flow?
  • answer these questions please  * quesetion number 1) you can choose odd number. 4] One teaspoon of sugar has a mass of 5.00g. F a} Calculate the energy change when a person consumes 2.00 teaspoons…
  • . Use the rules (in order) to assign oxidation numbers to each of the elements in the compounds below. tetrahydroxozincate ion H Zn Zn(OH) 42- v v manganese(?) oxide Mn O Mno v V iodic acid H I O HI…
  • Experiment #4 Introduction to the Scientific Method  Example 1: Childhood Asthma  Imagine that you are the parent of an elementary school student and a junior high student. You and your children m…
  • . Zn + HPbO, + Hyo-zn(OH), + Pb+ OH In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the …
  • . Enter electrons as el. The following skeletal oxidation-reduction reaction occurs under basic conditions. Write the balanced REDUCTION half reaction. Fe(OH)2 + Ag20-Fe(OH)3 + Ag Reactants Products…
  • please answer 5~9 questions ! Please don’t plagiarize other’s write ,,!. 5] Which sugar compound is more stable, glucose or sucrose".rII Explain. F 4.: 6] What mass of hydrogen gas should be burn…
  • please answer 1~4 questions !Â. 4] One teaspoon of sugar has a mass of 5.00g. F a} Calculate the energy change when a person consumes 2.00 teaspoons of sugar. 1-‘ {.l h} Energy obtained from food i…
  • Â Â 3. Â Â Â 4. Â. Multiplication and division of measurements V Decide whether each proposed multiplication or division of measurements is possible. If it is possible, write the result in…
  • how to calculate a volume in a spill problem if you know the mass Â. ular irregularly 2 shaped g 12.00 g so you can calculate om "Files" tab. The
  • 320 mL of water is heated from 25°C to ?3.0″C on a butane stove. Assume all the heat from combustion is used to warm the water. 13 C4H10[g} + ? 03(9) —} 4 002(9) + 5 H20″) Standard Enthalpie…
  • The diagram shows a circuit which contains two resistors. Calculate a. the total resistance of the two resistors in series. b. the current flowing in the cell (A) c. the current flowing in t…
  • Â 3. Â 4. Â. O MEASUREMENT AND MATTER E Setting up the math for a one-step problem with unit conversion 1/5 A certain chemical reaction releases 39.4 kJ/g of heat for each gram of reactant…
  • Pls help with qn 3 and 4. Question 3 One mechanism for the destruction of ozone in the upper atomosphere is: Step 1: O) (g) + NO (g) – NO2 (g) + 02 (g) [slow] Step 2: NO. (g) + 0 (g) – NO (8) + Oz (8)…
  • Answer ALL the questions exactly and correctly also show your work! 1) 2) 3) Â. A sample of ans] is reacted with HCllaq} to form hydrogen gas. The H2 gas bubbles out of aqueous solution and is collec…
  • Pls help with qn 1 and 2. Question 1 A general reaction written as 2A + 2B + C – D + 3E is studied and yields the Total following data: Experiment Initial rate Initial [A] Initial [B] Initial [C] (mol…
  • Data Collection Part 1: Atoms Name Table 1. Atomic structure of atoms and isotopes Charge Symbol Number of Atomic Mass Number of number Electrons hydrogen-1 1H+ Number neutrons +1 1 1 0 1 2H sodiu…
  • a sample of ice at -20 o C has pressure applied toÂit starting at 2 bar of pressure and stopping at 100 bar. The density of water can be taken to be 0.920 g/cm 3   at this temperature.   Wh…
  • Materials: kelvar Chemical formula of the material:________ Structure of the material:________ Properties and Uses:_______ How the material us being manufactured:______ Historical development ( if ava…
  • Materials: Carbon Fiber Chemical formula of the material:________ Structure of the material:________ Properties and Uses:_______ How the material us being manufactured:______ Historical development ( …
  • Please help me.. Â. Assessment: Multiple Choice. Read carefully each question. Choose the letter of your best answer and write it on the blank provided before each number. 1.Kinetic-molecular theory …
  • Question 1 (1 point) Â Â Â Â Â Â Â Â Â Ammonia is produced from its elements in a formation reaction. If 8.28 x 10 24 Âmolecules of ammonia are produced, how many mole of ammonia wa…
  • . TAREA 1: BALANCE DE ECUACIONES Instrucciones: realiza el balanceo de ecuaciones con sus 6 pasos para las siguientes ecuaciones: . HCI + Fe – FeCl3 + H2 COD Reactantes Productos + . FezO3 + H2O – F…
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  • What household chores involve separation techniques? can you cite them? which of those chores do you used to do? do you love doing it? why or why nor?
  • If 4 moles of H 2 O is required to be produced, how many moles of H 2 and how many moles of O 2 will be required (without using tables). Show your work. (1 point).
  • Based on this information, answer the following questions: A. If Levene’s tetranucleotide hypothesis were true, what results should have been obtained for every sample? B. Are Chargaff’s results consi…
  • Hello Expert. Please answer the following questions correctly. I will rate you right after. Thank you so much   Â. What is the % (w/v) of a solution that comprises 8.2 g of NaOH per 100 mL? 1 poi…
  • Hello Expert. Please answer the following questions correctly. I will rate you right after Â. What is the % (w/v) of a solution that comprises 8.2 g of NaOH per 100 mL? 1 point 8.2% 10.5% O 4.2% 6.8%…
  • How do intermolecular Forces affect melting and boiling points? Mention some examples.
  • . 13. Consider the molecule CH20ICHBr2. Which of the following statements is true? A. The molecule has both polar and non-polar bonds and the molecule as a whole is non-polar. B. The molecule has bo…
  • Can you tell the type of mixtures that can be separated by the given technique? Complete this table. Use a separate sheet of paper. Separation Type of Separation Type of Techniques Mixture Techniques …
  • What colour was the developed nickel (II) ion? What colour were your metal unknowns, C & D: Before development with NH3: After development with NH3: C: D: Before development with dimethylgloxime: …
  • Before development, which metal ions on your chromatograp Circle your choice(s). Fe3+ Cu2+ Ni2+
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  • Factors Affecting Reaction Rates [1 minute = 60 seconds]    Note: all times should be converted to seconds  A. Nature of Reactants A.1 The Affect of Metal Degradation Based on Acid Type Four a…
    • Write the FULL reaction rate equation for the following chemical formula: 5H2C2O4(aq) + 2KMnO4(aq) + 3H2SO4(aq) → 10CO2(g) + 2MnSO4(aq) + K2SO4(aq) + 8H2O(l)  2.) Suppose in the above reaction…
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  • Part 2: Independent Research Writing OF THE STRUCTURES, PROPERTIES AND USES OF MATTER Time Frame: 1 Week OBJECTIVES: The Student will be able to: Explain how the uses of the following materials depend…
  • Perform an experiment that shows at least 3 properties (related to the intermolecular forces) of 3 kinds of liquids. List the procedures that you will follow, write the resulting data, and make a conc…
  • Determine which of the following electron configurations are not valid; 26) 1s 2s 2p 3s 3p 4s24d"4p 27) 1s 2s22p 3s?3p 28) [Ra] 7s’5P 29) [Kr] 5s24d ‘5p 30) [Rn]
  • In the space below, write the abbreviated electron configurations of the following elements. Follow aufbau principle. 16) zirconium 17) bromine 18) tungsten 19) radium 20) thorium Determine what eleme…
  • Electron configuration Worksheet SCH4U For the following elements find the number electrons present in its atom. 1) Iron 2) magnesium 3) neon 4) rubidium 5) silver Use aufbau principle to predict whet…
  • Consider the following reaction: P 4 O 10(s) + PCl 5(s) → POCl 3(l) (UNBALANCED) 0.450 g of P 4 O 10 is mixed with 1.5000 g of PCl 5 and allowed to react as shown above. What is the mass (in g) of P…
  • MODULE 4-6 Part 2: Name: Strand: Year level & Section: Subject: Part 2: Independent Research Writing OF THE STRUCTURES, PROPERTIES AND USES OF MATTER Time Frame: 1 Week OBJECTIVES: The Student wil…
  • MODULE 4-6 Part 1: Name: Strand: Year level & Section: Subject: TEST 1. Determine the Polarity of the following compounds below using their Electro negativities. 1. Water (H10) 2. Ammonia (NH3) 3….
  • Suppose you had used 8g of sodium hydroxide in Part One. How would this have affected the change in temperature? What quantity of heat (enthalpy change) would have been evolved in your reaction? What …
  • What volume (in mL) of a nitric acid solution which contains 27.0% HNO 3 by mass and has a density of 1.19 g/mL will be needed to react with 9.35 g of Cu?
  • 125% [+ A 19 View Zoom Add Page Insert Table Chart Text Shape Media Comment Collaborate Format Document Data Sheets for Atomic Structure and Flame Tests 1. Give the name and element symbol of the elem…
  • Multiple choices: 1. In E. coli, the Dam methylase modifies which specific DNA sequence? CG CTAG AAAA GATC Â 2.The replicative DNA polymerase in E.Âcoli is: DNA polymerase II DNA polymerase IV. DNA …
  • If one of the three trials (for butane) is much different from the other two, check your notebook for a significant human error and eliminate that trial as "bad Data". Average molar mass o…
  • Part A: Average Molecular Weight of Butane, C4H10 , and unknown gas Water Temperature (C) 20 0 = 293 15 ( k) Atmospheric Pressure (given in lab) 7 23 .2 for = 1017 atm Literature value (CRC Handbook) …
  • Â 2. Â 3. Â Â 4. Â Â 5. Â. O MEASUREMENT AND MATTER E Setting up the math for a one-step problem with unit conversion 0/5 M A certain chemical reaction releases 12.0 kJ/g of heat for each gr…
  • Describe the main limitation of using a cation flame test to identify the cations present in an unknown solution containing one or moreÂcompounds.
  • Give 2 examples of practical uses of freezing point depression.
  • Using Excel, plot P-V relationship based on one of the following two options: (1) P (atm, on y-axis) ver- sus 1/ V (1/L, on x-axis) or (2) V (L, on j-axis) versus 1/P (1/atm, on x-axis). Properly labe…
  • The balanced equation P4(s) + 6H2(g) –> 4PH3(g) tells us that 5.0 mol H2 Â A. Â Âcannot react with phosphorus B. Â Âproduces 3.3 mol PH 3 C. Â Âreacts with 2.5 mol P 4 D. Â Âreacts with 5…
  • Hello, I need help with these questions, please? Â 1. Write the name & formulae for these compounds a. Â h2-1h13, this means: combine the ions. h2 to h13 means take h cation and h-13 anions and …
  • Surface charging affects the analysis in XPS and SIMS. What are the similarities and differences in problems of surface charge among those techniques?
  • I need help with this writing  https://www.babysfirstyears.com/press-releaseÂ(Links to an external site.)  Read the press release (linked above) about a recent study of infant brain development. …
  • Need help with the graph shown. Do know where to start.. POSTLABORATORY ASSIGNMENT 1. Naphthalene is a compound used in closets to destroy moth larvae and protect clothes. Use the following data to gr…
  • Question 31 2 pts What is the separation distance, in meters, between masses m1 = 53 x 10′ kg and m2 = 86 x 10′ kg when the gravitational force between them is F = 12 x 102 N? Please round your answer…
  • How much work is done when a 11-kg box is lifted to a height (vertical distance) of 11 m? Take g = 9.80 m/s2. Please round your answer to the nearest whole number (integer). Equation: W = mgd D Questi…
  • An employee pushes a crate with an applied force of 62 N over a smooth floor. The crate moves over a distance of 15 m. How much work does the employee do? Please round your answer to the nearest whole…
  • A ball is released from a height of 29.2 m. How fast is the ball moving just before it hits the ground? Take g = 9.80 m/s. Please round your answer to one decimal place. Equation: v = V2gh
  • .. What is the kinetic energy of an 13-kg object moving at 22 m/s? Please round your answer to the nearest whole number (integer). Equation: KE = – mv D Question 40 2 pts What is the potential en…
  • A 3,924-kg SUV can climb up a 361-m high hill in 34 seconds. How much is its power output in horse-powers? Take g = 9.80 m/s2. Please round your answer to the nearest whole number (integer). Equation:…
  • A ball is released from a height of 70 m from the ground. How fast (speed) is the ball moving when it is at a height of 18 m from the ground? Take g = 9.80 m/s2. Please round your answer to one decima…
  • Please help with the following question based upon the Environment of Aqueous Ions. Subject: Biological Inorganic Chemistry. Question 3 The ‘H NMR spectrum of a 1.54 M aqueous solution of ZnCl2 showed…
  • Can someone help me answer this, it’ll be a great help! Thanks! ________________________________________________________________________________________________________________________________ Questio…
  • View Policies Current Attempt in Progress Which of the following compounds will be expected to be strong electrolytes in aqueous solution? Select all that apply. CaF2 O Fe(CH302)3 O AI(NO 3) 3 O C6H 1…
  • i need help with dilution concentration and absorption and any other blanks that you know how to fill. Name of dye (1 pt)Concentration of stock solution 4×10^-5 (2 Amix (with units) $19mm (2 pac.) Bur…
  • iew Policies urrent Attempt in Progress Vinegar contains acetic acid (HC2H302), which is responsible for its acidity. In one analysis of a commercial vinegar brand, a 15.00 ml sample was titrated with…
  • ew Policies urrent Attempt in Progress NaHCO3 can be used to neutralize excess acid in situations such as, for instance, acid spills in the laboratory. The reaction is: H*(aq) + HCO3"(aq) – H2O(1…
  • Please help the following questions on the topic of Environment of Aqueous Ion. Subject: Biological Inorganic Chemistry. This is all the information I was given. a) Use a sketch to illustrate the mode…
  • In which group of elements do the atoms have the smallest radii as you move across a period?
  • The colors of the rainbow are given by the acronym ROYGBIV (red, orange, yellow, green, blue, indigo, violet).ÂIf I tell you that sunlight passed through a prism will separate into colors by bending …
  • What are the molar concentrations of the ions in 0.31 M FeCl3? C (Fe3+) – M c(CI) = i M e Textbook and Media Hint Save for Later
  • Need help figuring out equilibrium expressionsÂ. Consider the following balanced reaction. 1 N44043 (8)-> 44 N (g) + 43 0 (g) When writing the equilibrium expression, what is the exponent for O (g…
  • In which group of elements do the atoms have the smallest first ionization energy as you move across a period?
  • An AM radio station broadcasts at a wavelength of 0.500 kilometers. Microwaves can have a wavelength of 12 cm. A fire place can give off photons with a wavelength of 1.5 x 10 -3 millimeters and th…
  • How many milliliters of water have to be added to 144.8 mL of 0.41 M HCI to reduce the concentration to 0.10 M HCI? Vwater= mL
  • I need help with this question. Base on significant figures rule, what should be the correct answer of: 2 x 6 = Select one: O a. 1.2×101 O b. 10 O c. 12 O d. 12.0
  • Predict two bubble/tank gas combinations that will result in a bubble that sinks. Â Write the gas combinations in the table below. You will test them in Part 4. Â Only these 5 gases can be used in P…
  • Which one of the equations below represents what happens when HC2H302 is dissolved in water? O HC2H302 + H20 HaO"(aq) + C2H3Oz*(aq) O HC,H302+ H20- C2H3Oz+(aq) + OH-(aq) O HC2H302 + H20 H3O+(aq) …
  • I need help with these questions. Base on significant figures rule, what should be the correct answer of: 5.23 x 10’+ 2.1 x 107 = Select one: O a. 7.3x 107 O b. 7.33×107 O c. 7×107 O d. 7.0×107
  • I need help with this question. When adding or subtracting the final significant figure must be in the same position as the most precise number. Select one: O a. False O b. True
  • Which of the following QC rules would be broken 1 out of 400 times by chance alone? 1 2s 2 2s 1 3s 1 4s
  • I OH H O =C – C- C – OH – I – C – CEC – AZOH H I- I-I=0 – N I- V- I H – I 20. Review the valences of carbon, oxygen, nitrogen and hydrogen, and then determine which of the following =O I OH – I O=C …
  • A ball that weighs 30.6 N travels at a velocity of 13.7 m/s. What is its momentum? Take the acceleration due to gravity as g = 9.80 m/s2. (Hint: first find the mass of the ball). Please round your ans…
  • Review the density data from part 2 for the gases used in part 4.  Which gas should always float in a bubble regardless of what other gas is used in the tank? argon   CO2   nitrogen   ox…
  • How large is the gravitational force between two large masses, m1 = 4.8 x 10 kg and m2 = 4.8 x 10′ kg? The distance between the two masses is 29 m. Please round your answer to the nearest whole number…
  • Ice floats in water. From this we can infer that Ice is less dense than water   Ice is more dense than water.
  • Let’s say that your weight on earth is 722 N. How much would you weigh if you were on a planet where the acceleration due to gravity is 3.6 m/s ? Accelerations due to gravity on earth is 9.8 m/s . Ple…
  • Buoyancy is due to relative densities of substances. Which of the following is true? A less dense substance will sink in a more dense substance. Â Â A less dense substance will float in a more dense…
  • A 27-kg cart is pushed with a force of 462 N. What is the acceleration of the cart? Please round your answer to one decimal place. Equation: a = F m
  • The 1-4 linkage shown below is most likely found in which compound: CH,OH OH I O U I C I OH I . (I OH a. glycogen; O b. starch; U – I mical pathways c. pectin; OH d. cellulose; CH,OH pecific compo…
  • . Question 23 1 Point Identify which of these orbitals has the lowest energy. A 1s B 5f 2p D 2s Question 24 1 Point Identify which of these orbitals has the lowest energy. A 7p B 5f 6f D 5p
  • . Question 19 As a medical professional, it is very important to understand the types of radiation and wavelengths in the electromagnetic spectrum. At 400nm, would the wavelength be short or long? W…
  • Make your own data table including all the data collected by all 6 groups. Use the following column headers: Group number and components present in jar (salt, sand and zinc). Don’t worry if what you d…
  • For the following reaction K = 30.0 2A(aq) -> B(aq) + C(aq) The initial concentration of A is 2.3 M (with no B or C). What is the equilibrium concentration of B in M? Your Answer:
  • Calculate the wavelength of light absorbed (in nm) corresponding to the n = 1 to n = 5 excitation in a hydrogen atom. ΔE=−(2.18×10−18ÂJ)(1nf2−1ni2) E=hν=hcλ
  • • If you drop a 3.5 g gold cube (d = 19.3 g/ cm3 ) into a graduated cylinder with the initial water level at 35 mL, what will the final water level be?
  • Copper 11 sulfate pentahydrate. 1. Describe any evidence during the experiment that the copper(II) sulfate pentahydrate was under heated. 2. Explain what effect would under heating have on your result…
  • how to find that number ( 0.09959) ?. Sample concentration calculation: 1.105 = 0.0076x + 0.9959 1.105 – 0.9959 = 0.0076X 0. 1091 = 0.0076 X – X = = 14.35 % (w/v)
  • The box shown in the figure below has a mass of m = 14 kg. Two forces act on the box in opposite directions: F1 = 931 N and F2 is an unknown force. What is the unknown force F2 (in Newtons) if the acc…
  • Copper 11 sulfate pentahydrate. 4. Explain what effect would over heating have on your results, specifically would the result for the % water be too high, too low, or not affected at all? 5. Examine t…
  • A ball is dropped from the top of a tall building and it takes 4.14 s to hit the ground. Ignoring air resistance, how tall is the building in meters? Take the acceleration due to gravity as g = 9.80 m…
  • A ball that was moving at 26 m/s started to slow down. The ball slowed down to 13 m/s in 5 seconds. What is the acceleration of the ball? Note that acceleration is negative (put the negative sign in t…
  • A car is traveling at an average speed of 58 mph. What is the distance, in miles, that the car covers in 6 hours? Please round your answer to a whole number (integer) Equation: d = vt
  • An airplane that was initially moving at 47 m/s is accelerated at 7 m/s2 for 18 s. What is the final speed of the airplane? Please round your answer to the nearest whole number (integer). Equation: of…
  • D Question 13 2 pts ents Given that: $2 = 2.0 a (3.0 b + 4.0 t3). What is the value of t if s = 119, a =5, and b = 16. Please round your answer to two decimal places. D Question 14 2 pts Write the pro…
  • Your Annotated Bibliography ÂON Gentrification meaning by 3different authors.
  • WebAdvisor Main… FTCC Student Email N Novell WebAccess FTCC Management… Imported From IE M Gmai Question 8 2 pts The mass of a large rock is measured to be 82,546 grams. How many kilograms is the …
  • Mass of Beaker 29. 8101 9 2 Mass of Beaker and NaHCO3 before heating 35. 6585 3 Mass of Beaker and NaHCO3 after heating 73 . 5052 4 Mass of NaHCO3 (#2 – #1) 5.8484 5 . Mass of Decomposition Product…
  • Give the number of significant figures in each of the following: Value 1.05 g 0.0003040 mm 2908.0 g 9 × 104 L 9.00 × 104 sec  2. Round each of the following to 3 significant figures. Value Rounded…
  • I -is called and it is formed via a[n] H- O-C-C-O-H 1,2 diol oxidation of ethene * reaction X H TI-C H H H H I O-I I 1 C-C- C-( mis called I 1 and it is formed via a[n] H H Jn polyproplyene polymeriza…
  • Calculate the volume of 4.04 mol Ar gas at 8.25 torr and 27.0 C. Enter your answer in the box provided. S
  • Question 1 (1 point) 2 C4H10 + 13 02 —> 8 CO2 + 10 H20 Using the equation above what is the mole ratio between C4H10 and CO2 ?
  • 21-cm of a metallic cylinder has a mass of 157 grams. What is the density of the cylinder in g/cm ? Please round your answer to two decimal places. Equation: p = m V
  • The density of gasoline is 721 kg/m . What is the mass of 47 liters of gasoline? (One liter = 0.001 m ). Please round your answer to two decimal places. Equation: m = p V.
  • Need help figuring out equilibrium equationsÂ. Consider the following balanced reaction: 5 A (s) + 1 B (aq) – -> 1 C (1) + 9 D(g) When writing the equilibrium expression, what is the exponent for …
  • thank you for the help.. 3. Given below is the bond-force curve (i.e. the atomic force between two neighboring atoms as a function of bond-distance) for a solid-state system. From this curve, determin…
  • Â 3. Â Â 4. Â Â 5. 6. Â Â. E O MEASUREMENT AND MATTER Setting up the math for a one-step problem with unit conversion 0/5 V The speed of light is 2.998* 10" m/s. How long does it tak…
  • What is the significance of the disappearance of the blue color?
  • 4 . How manes moles of oxygen must be placed in a 3.00 liters container in order to exert Ot presure OF 2:00 atmospheres at 250 0 ?. NO: DATE: 5). A gas is heated Froin 263 k to 298k. The volume is in…
  • NO: DATE: 1. Determine the number OF moles in a container of gas at STP with a volume of 99. 26 . 2. A sample of gas with a volume of 30-0 mL at 25. 0 % is heated to 50.0 0 what is the new volume OF t…
  • What is volume of a block whose density is 415 kg/m and whose mass is 67 kg? Please round your answer to three decimal places. Equation: V – m
  • What is mass of a block whose density is 849 kg/m and whose volume is 0.037 m3? Please round your answer to one decimal place. Equation: m = p V.
  • . Data: Here is the table needed when preparing the solutions of known concentration. Note that the final volume for all the solutions will be 10 mL because we’re using 10 mL volumetric flasks. Summ…
  • What is density of a block whose mass is 11 kg and whose volume is 0.054 m3? Please round your answer to one decimal place. Equation: p =
  • quelim Tetrafluoroethylene is a compound manufactured for industrial processes. It can be formed via two types of Not yet rest lions, addition ex elimination mealians. I o each reaction, answered – wi…
  • Your Annotated Bibliography  on Gentrification definition by two authors
  • The phase in transition in which a solid is converted to a gas is called _____________. A(n) increase or decrease in pressure or the addition or removal of heat can accomplish such a phase transition….
  • need help figuring out equilibrium exprssions. Consider the following balanced reaction: 6 A (s) + 6 B (aq) –> 8 C (1) + 9 D(8) When writing the equilibrium expression, what is the exponent for D …
  • Which element is oxidized and which is reduced in the following reactions? Drag the appropriate items to their respective bins. Reset Help the Cl atom in Cl2 (g) + 2NaBr(aq)- the Cl atom in the Cl ato…
  • https://docs.google.com/document/d/1S-ykzAkWKWZ0g0yx2vph0e5cmIp1Ahts/edit?usp=sharing&ouid=111997302866772400253&rtpof=true&sd=true
  • . ues Ion ‘ W Calculate the average atomic mass for the following isotopes: Lithium: lithium-6 (6.0151 amu) at 7.59%, lithium-7 (7.0160 amu) at 92.41% Use the editor to format your answer Question…
  • I did the two that are left by my answers keep getting further away from the answer options shown on the right. please help me T_T. 1-15 In the following reaction, how many moles of KCI will be produc…
  • . 5. Choose the shape (1 to 6) that matches each of the following descriptions: 1. linear 2. bent (109.) 3. trigonal planar 4. bent (1209) 5. trigonal pyramidal 6. Tetrahedr Description Shape Number…
  • . 5. Choose the shape (1 to 6) that matches each of the following descriptions: 1. linear 2.bent(109′) 3.trigonal planar 4. bent(120′) 5.trigonal pyramidal 6.Tetrahedra| Description Shape Number A…
  • A sample of oxygen, at 24 C, occupies a volume of 5.96 x 102 milliliters (mL) at 1.60 atm pressure. "What pressure must be applied to compress the gas to a volume of 1.65 x 10 mL, with no tempera…
  • Question 8 X Answered – Incorrect . 1 attempt left At 298 K the reaction N2(g) + 3 H2(g) – 2 NH3(8) has Kc = 4.2 x 108. What is the value of Kc for the reaction 1/3 N2(g) + H2(g) – 2/3 NH3(g)? Respond…
  • Can I get help answering these chemistry Gas Law problems? Please and Thank you! Â Convert the following pressure units as instructed. Be sure to show all your work with units in your work 1.) Conver…
  • If you drop a ball bearing (mass = 11.4 g) into a graduated cylinder and the ball bearing displaces 5 mL of water, what is its density in g/cm3?
  • Observe the peptide bonds in a-helix. What is the direction of the dipole for each one? How does this affect the dipole of the a-helix as a whole? What implications does this have for a protein st…
  • Complete a model for each of the six nuclear changes. You can use diagrams or pictures. Â Alpha decay of an element with an atomic number of 84 and a mass number of 210 Beta-plus decay of an element …
  • Molecular weight data for a polymer is tabulated below (x; denotes the molar fraction of the polymer of the indicated molecular weight). Compute (i) the number average molecular weight, (ii) the w…
  • Part D – Net ionic equation 2Lit (aq) + SO,2-(aq) + Sr2+(aq) + 2CIO, (aq) – SrSO4(s) + 2Lit (aq) + 2CIO, (aq) The complete ionic equation you determined in Part C is shown above for your conveni…
  • What is the mass (in grams) of the solid product when 7.74 g of iron (iii) chloride reacts in solution with excess sodium phosphate? Step by step answer please? FeCl3 (aq) + Na3PO4 (aq) ——&g…
  • What is the mass (in grams) of the solid product when 6.95 g of iron (II) nitrate reacts in solution with excess sodium hydroxide? Step by step answer please. Fe(NO3)2 (aq) + NaOH (aq) ——>…
  • Original NaOH Stock solution concentration (M): Volume of stock used (ml): Total volume of solution in flask after dilution (ml): New NaOH solution concentration (Working Stock) (M): Hint: Label out w…
  • Notice that at first there is air at the bottom of the buret below the stopcock. Enough base needs to be added to the buret to fill up the tip and get rid of the air bubble. If he had not done this…
  • What mass of oxygen (in grams) reacts when 14.6 g of methanol (CH3OH) are combusted in oxygen to produce carbon dioxide and water? Step by step answer please.
  • This assignment uses a ChemCollective virtual lab. Using a computer that is running Microsoft windows or Macintosh OS 10.1 or higher, go to http://chemcollective.org/activities/autograded/124 1. Make …
  • Titration a. Slowly begin to titrate by adding 1 mL increments. Then 0.5 mL increments and then 0.25 mL. Please watch the prelab video to see how to do this. b. Once the solution turns pink, stop your…
  • nce and Mathematics. In this part of the lab, you will be watching the video to see technique, and getting the data needed to answer the following questions. The link is s://www.youtube.com/watch?v=ht…
  • What is the theoretical yield (in mol) of carbon dioxide when 2.35 mol oxygen reacts with 2.73 mol of ethanol (CH3CH2OH) to produce carbon dioxide and water? Step by step answer please.
  • If I have 500 mL of vinegar and it contains 50.4 g of acetic acid (MW = 60.052 g/mol), what is the concentration of acetic acid in units of molarity?
  • What is the theoretical yield (in grams) of the solid product when 6.98 g of iron (iii) nitrate reacts in solution with 4.68 g sodium phosphate? Step by step answer please. Fe(NO3)3 (aq) + Na3PO4…
  • Concentration of unknown CH,COOH is ? Titration: NaOH versus CH3COOH Ph at which equivalence occurred: 10.31 Volume of titrant needed to reach equivalence: 41ml
  • What is the percent yield of the solid product 15.46 g of iron (iii) nitrate reacts in a solution with excess sodium phosphate and 5.517 g of the precipitate is experimentally obtained? Step by s…
  • For the next three questions, consider the reaction A( g ) + 2B( g ) → 2C( g ) + 2D( g ) and associated that was collected at a constant temperature.  1) ÂConsider the same reaction carried out t…
  • Exercise 1ÂExercise 1: Water of Hydration In thisÂexercise, you will determine the chemical formula of a hydrated potassium aluminumÂsulfate sample (alum). Procedure Put on the safety goggles and g…
  • What is the percentage yield of the solid product 19.34 g of barium nitrate reacts in solution with excess sodium phosphate and 4.401 g of the precipitate is experimentally obtained? Step by step…
  • What is the experimental yield (in grams) of the solid product when the percent yield is 82.81% when 2.33 g of iron (iii) chloride reacts in a sodium which excess sodium phosphate? Step by step a…
  • What is the experimental yield (in grams) of solid product when the percent yield is 82% with 11.56 g of iron (II) nitrate reacting in solution with excess sodium phosphate? Step by step answer p…
  • The following question is with regards to the chemical reaction between CV+ and OH-.  Express equations (1) and (2) for 𝑚=2 using the absorbance of CV instead of its concentration. Define your te…
  • How many total moles are produced when 0.627 mol of ethanol (CH3CH2OH) are combusted in oxygen to produce carbon monoxide and water? Step by step answer please?
  • The following question is based on the reaction between NaOH and CV+. What would the practical issues be if the flooding technique was used by applying an excess of CV instead of OH-?
  • What is the total sample size (in grams) for a sample of sodium nitrite which contains 3.23 g of oxygen? Step by step answer please.
  • . Part C Solid sodium oxide reacts with liquid water to form aqueous sodium hydroxide Express your answer as a chemical equation including phases. O_ AEd O Xb h X X 2Na(s) + 2H, O(1)-H, (g) + 2NaOH(…
  • What is the total sample size (in grams) for a sample of ethanol (CH3CH2OH) which contains 2.93 g of oxygen? Step by step answer please.
  • please pay attention to sig figs thank you. V Here is u youph of the pressure of oxygen (O, ) In a reaction vessel during a certain chemical reaction. Use this graph to answer the questions in the tab…
  • What is the total sample size (in grams) for a sample of aluminum acetate which contains 2.64 g of oxygen? Step by step answer please.
  • What is the mass of oxygen in 6.8 g of iron (ii) oxide? Step by step answer please.
  • Step by step answer please.. Question 73 What is the mass of oxygen in 7.35 g of aluminum oxide? Not complete Marked out of 1.0 Answer: Flag question Check
  • Step by step answer please.. Question 72 What is the mass (in grams) of 1.04 mol of carbon dioxide? Not complete Marked out of 1.0 Answer: Flag question Check
  • Exercise 1 – Questions Question 1 Â 1. Calculate the moles of anhydrous (dry) KAl(SO 4 ) 2 that were present in the sample. Show all work including units. Â Question 2 2. Calculate the ratio of mole…
  • How many mol of carbon are in 26.7 g of potassium cyanide? Step by step answer please?
  • How many mol of carbon are in 25.5 g of carbon disulfide? Step by step answer please?
  • How many mol of carbon are in 27.5 g of aluminum acetate? Step by step answer please.
  • What is the pressure in atmospheres exerted by a column of mercury that is 100. m high? (density of mercury = 13.5951 g/cm, gravitational constant = 9.80665 m/s2, 1 atm = 101,325 Pa = 760 torr = 760 m…
  • What is the mass (in kg) of helium if it filled a square room if the room has walls that are 9.45 feet high and 9.45 long and the density of helium is 0.18 g/L step by step answer please.
  • What is the mass (in g) of a cube of aluminum (density = 2.702 g/mL) with an edge length of 0.14 feet? Step by step answer please.
  • Calculate the value of the equilibrium constant, Ke, for the reaction Q(g) + X(g) – 2M(g) + N(g) given that M(g) = Z(g) Kel = 3.49 6 R(g) – 2N(g) + 4Z(g) Kc2 = 0.571 3 X(g) + 3Q(g) -9R(g) Kc3 = 14.9
  • What is the length (in cm) of an edge of a cube of lead (density = 11.3 g/mL) which has a mass of 21.08 Ib? Step by step answer please.
  • The density of octane is 0.703 g/mL. What mass (in g) will a 0.7941 gallon sample of octane have? Step by step answer please.
  • Step by step answers please.. Question 1 The density of gold is 19.3 g/mL. What volume (in mL) will a 1.069 lb sample of gold occupy? Not complete Marked out of 1.0 Answer: Flag question Check
  • If I have 500 mL of vinegar and it contains 50.4 g of acetic acid (MW = 60.052 g/mol), what is the concentration of acetic acid in units of molarity? answer: 1.68M. need to know how this was solved
  • Write a formula for the molality (m) using msol (mass of benzoic acid solute in g), M (the molar mass of benzoic acid), and msolv (mass of the lauric acid solvent in kg). Use symbols only, NO NUMBERS …
  • tion 15 et According to the VSEPR model, a molecule with the general formula ABs with one lone pair on the central atom will have a vered molecular geometry. ts out of Select one: O a. tetrahedron Fla…
  • The concentration of mercury, a toxic pollutant, in some yellowfin tuna is 354 mg in 1.0 x 10 6 g of fish. The Food and Drug Administration recommends that women who are pregnant should eat no more th…
  • Write a balanced chemical equation for each chemical reaction. Â Â. Part C Solid sodium oxide reacts with liquid water to form aqueous sodium hydroxide. Express your answer as a chemical equation in…
  • without using Google, is this the proper way to name these? I always had trouble naming and also the teacher asked us not to the name the acidic as found on Google. please let me which ones are wrong …
  • Predict the ground electronic configuration of a Ti 2+ Âion. a.[Ar]4s 1 4p 1 b.[Ar]4s 2 c.[Ar]3d 2 d.[Ar]3d 1 4s 1 Â 2. A line in the Balmer series of the emission spectrum of atomic hydrogen is …
  • (4 pts) Extra Credit: Determine Kc at 300K for the unbalanced equation CH4 (g) -C2H2 (g) + H2(8) Report to 2 significant figures and given the following data CH4(g) + H20(g) – CO(g) + H2(g) Kp = 1….
  • don’t copy answers from Internet. 4. The measured specific heat of BAs is listed below. Calculate the Debye temperature and Sommerfeld coefficient of BAs. BAs has a Zinc blende crystal structure. The …
  • The concentration of mercury, a toxic pollutant, in some yellowfin tuna is 354 mg in 1.0 x 106 g of fish. The FDA recommends some populations should eat no more than 6.0 oz of yellowfin tuna per we…
  • (6 pts) Relating Free Energy and Equilibrium Constant Supposed a reaction is given by: aA + bB – cC + dD where a, b, … are the coefficients and A, B, …, C, D are the reactants and products. (a)…
  • What is the concentration of PO43′ in a 3.17 M solution of phosphoric acid (H3PO4) at equilibrium? For the online retake enter your answer in the following format: 1.23e-4 (no spaces) a —
  • You have been tasked to give a report about the difference in the Bohr Model v. Quantum Mechanical Model of the atom. Describe 5 main difference between the Bohr Atom Model and the Quantum Mechanical …
  •  2.  3.    4.  5.  6.    7.. D LSU Louisiana State University X Homework #7 due Wednesday, F X + X C A & https://moodle.Isu.edu/mod/quiz/attempt.php?attempt=27…
  • For a hydrogen atom, calculate the wavelength of light (in m) that would be emitted for the orbital transition of n(initial) = 5 to n(final) = 3. Submit an answer to four significant figures. The Rydb…
  • What is the wavelength of light (in nm) emitted when an electron transitions from n = 5 to n = 2 in a hydrogen atom? Submit an answer to three signficant figures.
  • . MISSED THIS? Watch KCV 7.3, /WE 7.2: Read Section 7.4. You can click on the Review link to access the section in your e Text. V Part A Write a balanced chemical equation for the photosynthesis rea…
  • Calculate the pH of a solution that is made up of 1.75 M hypochlorous acid (HCIO) and 1.21 M potassium hypochlorite (KCIO). 7.697
  • Acids and Bases  1. What different ways are there to view Acids and Bases other than the simplistic Arrhenius model in which acids produce hydrogen ions and bases produce hydroxyl ions in aqueous …
  • . Determine the temperature at which the following system is at equilibrium, spontaneous and non-spontaneous. FORMULA : G = H -TS G >0 non spontaneous G = 0 equilibrium G < spontaneous C3H8…
  • Provide the subheading for each .  summarize Prednisolone mechanism of action, pharmacology, structure-activity relationship, and general routes of metabolism. Also, provide reference.
  • Human blood has a molar concentration of solutes of 0.30 M. What is the osmotic pressure of blood at 25.C? A) 0.012 atm B) 0.62 atm C) 6.8 atm D) 7.3 atm E) >10. atm Ans: D Difficulty: E
  • What is an exact number of surface area of a 10 ngwee coin
  • Â 3. Â 4. Â 5 Â Â 6. Â Â 7. Â 8. Â 9. Â 10. Â. E O ATOMS, IONS AND MOLECULES Finding isoprotonic atoms 2/5 Write the chemical symbols for three different atomic cations that all have …
  • Iron ores have different amounts of iron per kilogram of ore.    Part B Which ore has the highest iron content of the 3 listed below?     hematite magnetite siderite       …
  • A cubic centimeter is a unit of length A) true B) false
  • two main types of chemical reactions (acid-base reactions and oxidation-reduction reactions), provide an explanation of how the reaction occurs, and two common examples of where those reactions occur …
  • . Enthalpy and Entropy Changes for Borax Dissolution Objectives Students will determine the enthalpy change (AH) and entropy change (AS) for the dissolution of borax (sodium tetrab…
  • Classifying material as either solids, liquids, or gasses is not always simple. In this module’s essay, you will be exploring this concept and the limitations of categorizing various materials. Case A…
    • moles of octane, a component of gasoline, are burned in the presence of 8 moles of 02. The complete combustion of octane, C8H18 proceeds as follows: 2C8H18 + 2502 – 16CO2 + 18H20 – Who is the limi…
  • A researcher needs to create 100 mL of a buffer solution that can maintain a pH of 10.0 at 25 .C. a) First, which weak acid/conjugate base pair is preferable for this buffer: CH3COOH/CH3COO- (acetic a…
  • For each of the following, write a relationship between moles of oxygen and moles of molecules. Then determine the total number of oxygen atoms present. (HH-white; OO-red; CC-black; SS-yellow) **Us…
  • A vat of lye contains 2.93 x 1024 formula units of NaOH. How many moles of NaOH are in the vat?
  • ) Some antacid tablets contain Al(OH)3 to react with stomach acid (HCl): 𝐴𝑙(𝑂𝐻)3 + 3𝐻𝐶𝑙 → 𝐴𝑙𝐶𝑙3 + 3𝐻2𝑂 – Calculate the number of grams of HCl that can react …
  • Unit B Module 3 Lesson 1 Assignment (1) 2.doc – Physics 30:
  • How many copper atoms are in a pure copper statue with a mass of 121 kg ? Â Express your answer to three significant figures.
  • A pure gold coin contains 0.150 molmol of gold. What is its mass? Express your answer in grams to three significant figures.
  • Since Sodium Hydroxide is omitted from the equilibrium equation how would I go about solving this?. NaOH(s) <> Na*(aq) + OH'(aq) + 10.6 kcal (Remember that pure solids and liquids do not affect …
  • . Part D 0. 175 mol Na Express your answer using three significant figures. VO AEd ? N = atoms Submit Request Answer. Part B 6.5×10- mol C Express your answer using two significant figures. AEd ? N …
  • . What is the pH of a solution that results from adding 0.061 mol KOH (s) to 1.25 L of a buffer comprised of 0.361 M HF and 0.361 M NaF? | 3.0245
  • [References] INTERACTIVE EXAMPLE The Combined Gas Law A gas in a flexible container has a volume of 0.52 L and a pressure of 1.0 atm at 398 K. When the gas Is heated to 499 K, Its volume expands to 2….
  • WORKING WITH POLYVALENT ELEMENT WRIT The chart below shows five elements that are polyvalent. It shows the different oxi numbers and the names that their compounds have. Writ OXIDATION NUMBERS OF META…
  • [References] TUTOR Charles’s Law A sample of gas has a volume of 3.28 L at a temperature of 40.30 .C. The gas sample Is cooled to a temperature of -21.80 .C (assume pressure and amount of gas are held…
  • TUTOR Boyle’s Law A sample of gas has a volume of 587 ml at a pressure of 4.95 atm. The gas is compressed and now has a pressure of 8.45 atm. Predict whether the new volume is greater or less than the…
  • [References] Aspirin Is made by the reaction of salicylic acid with acetic anhydride. COOH O O COOH + CHq-C-O-C-CH3 + CH3 COOH OH OCCH3 (C7HO3) (CHgog) O: Salicyclic acid (s) Acetic anhydride (() (C,H…
  • Can you help me? I’m doing a Spectrophotometric Determination of Kc lab. Â. . Set up an ICE table for the reaction in each of the five flasks and use your initial 10concentrations to fill it in compl…
  • Consider the titration curve below, that shows a strong acid titrated with a strong base. Which point represents the equivalence point? E 10 D B C A SD Volume of Base Added
  • You add 5.0 mL of a 2.0 M solution of compound “A” to 2.0 mL of a 3% (m/v) solution of compound “A” (MW of “A”: 90g/mole). What is the concentration of compound “A” in mg/mL in the final solution?
  • [References] Calculate the number of: a. nitrogen atoms in 42.6 g of TNT, C7H; N3 06 N atoms b. carbon atoms in 11.8 g of ethanol, C2H6 O C atoms c. oxygen atoms in 0.810 g of aspirin, CHg O4 O atoms …
  • 1-Liv is trying to decide which molecules to use for her chemistry reaction. The first thing she has to do is find the molar mass of each of the molecules she can potentially use. Calculate the molar …
  • Why can licorice be harmful if consumed in excessive amounts and which specific populations should avoid consuming high amounts of the sweet treat? Are there special circumstances when licorice and it…
  • A beaker containing 0.400 g KHP was titrated with NaOH solution. The pale pink end point was reached after 17.89 mL of NaOH solution was dispensed. What is the molarity (in mol/L) of the NaOH solution…
  • Calculate the collision frequency (s-1) of O2Â(σÂ= 0.40 nm2) molecules in a gas at 1.00 atm and 25°C. Â. 1/2 OurelP op 8RT Z = = x V2x KT KT
  • Answer the following questions with no light, light, very bright light and then whether it is electrolytes or non-electrolytes: Answer the following questions with observations like what color it make…
  • Nickle has a face-centred cubic structure and has a density of 8.90 grams per cubic centimeter. What is the mass of a single unit cell of nickle? A. 3.899 X 1022 g O B. 1.026 X 1022 g O C. 1.974 X 10-…
  • Subject: Science, Chapter 12 Topic: Rates of Reaction Can you please help me answer this assignment in science? Thank you. Please see the image below. CHAPTER 12 9 a) What is the name of catalysts in …
  • Use the identities of the following amino acids to answer Questions 1 to 3: Histidine (His)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂPhenylalanine (Phe)ÂÂ…
  • Subject: Science, Topic: Rates of Reaction Can you please help me answer this assignment in science? Thank you. Please see the image below. Catalysts Here are some statements that could describe catal…
  • An unknown compound contains only CÂ, HÂ, and OÂ. Combustion of 9.50Âg of this compound produced 22.4Âg CO2 and 6.11Âg H2OÂ. What is the empirical formula of the unknown compound? Insert subscr…
  • Subject: Science, Topic: Rates of Reaction. 5. David is investigating the volume of gas produced in a reaction. Here are the results (Shown below on what I draw under 5. b) (ii)) Can you please help m…
  • . Module 02 Content Why is it necessary for the spins of two electrons that occupy one orbital, to be in the opposite directions? What is that law called? Use the editor to format your answer
  • Please explain the process in detail and legible manner :). Problem 1 The Schrodinger equation for the hydrogen atom can be written V 2 y e 2 4TTEor 1 = Ey (1) where e is the charge of an electron (an…
  • Describe the pathophysiology and epidemiology of Cushing’s syndrome and how its development can be avoided or the condition be treated?
  • . PART A: Pre Pop Procedure 1. Prior to lab obtain two packages of microwavable popcorns. 2. Each package should have approximately 80-110 grams of popcorn in the package. Weigh each sealed package …
  • 1: 2: 3: Â. Using the phase diagram for benzene shown below a)What is the Normal Boiling Point of benzene? b)Does benzene sublime at STP? The following phase diagram is for benzene C6116. (For refere…
  • 1: 2: Â. Given the following balanced equation, determine the rate of reaction with respect to [H2]. N2(g) + 3H2(8) – 2NH3(8) 34[H2] A) Rate = + At B) Rate = _ 2 4[H2] At C) Rate = + 3 A[H2] 2 At D) …
  • HI! CAN SOMEONE ANSWER THE NUMBER 4? 1. Take some water with a straw and put a few drops on plastic sheet. a. What is the shape of the drop? answer: The droplet creates a sphere/ball shape. The spheri…
  • 1: 2: 3: Â. Nickle has a face-centred cubic structure and has a density of 8.90 grams per cubic centimeter. What is the mass of a single unit cell of nickle? A. 9.746 X 10-23 g O B. 1.974 X 10-11 g O…
  • A buffer solution was prepared by mixing 30.0 mL of 0.250 M HCH303 (furoic acid) with 20.0 mL of 0.220 M NaCH303 (sodium furoate) and diluting to a total volume of 125 mL. The pH of the buffer solutio…
  • Thank you!!:). For this discussion assignment I’d like for you to find something that you use on a regular basis and analyze it for it’s chemical content. The only requirement is that the item must co…
  • Hello, I’d appreciate help completing this with steps. These are the data  Dodecanoic acid, M = 200.32 g/mol Benzoic acid, M = 122.12 g/mol  Freezing temperature of dodecanoic acid: 43.494 C…
  • 1: 2: Â 3: Â. A buffer solution was prepared by mixing 30.0 mL of 0.250 M HCH303 (furoic acid) with 20.0 mL of 0.220 M NaCH303 (sodium furoate) and diluting to a total volume of 125 mL. The pH of th…
  • In the US, nutritional energy is reported in Calories (Cal). One nutritional Calorie is equal to one kilocalorie (kcal). If a food package reports 250.0 Calories (Cal) per serving, how many calories (…
  • point of acid A? The graph below shows two titration curves: 40.0 ml of two different acids are titrated with 0.100 M NaOH. What is the pH at the half-equivalence 14 12 Figure taken from: Brown, LeMay…
  • . The graph below shows two titration curves: 40.0 mL of two different acids are titrated with 0.100 M NaOH. Which acid is more concentrated? 14 Figure taken from: Brown, LeMay, Bursten, 12 Langford…
  • . The graph below shows two titration curves: 40.0 mL of two different acids are titrated with 0.100 M NaOH. Which curve is for the titration of a strong acid? 14 Figure taken from: Brown, LeMay, Bu…
  • An unknown solution gave a strong yellow flame test. The solution gave no reaction with ammonium carbonate, ammonium phosphate, or ammonium sulfate. The halide test produced a – yellow-orange color…
  • Please provide a step by step solution with an explanation for each step. Thanks you. Please be accurate and do the work. Don’t copy off chegg or something. Â. 1. A modified equation of state for a…
  • What element forms an ion with an electronic configuration of 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 10 4 p 6 (or [Kr]) and a −2 charge? Give the symbol for theÂelement.
  • Please provide a full detailed step by step solution to the provided problems. Thank you. Â. 1. A modified equation of state for a real gas is the following: RT a P = (V -b) TV (V + c) With a,b,c and…
  • . Write and balance the equation for the complete combustion of ethane, C, H . Phase symbols and energy changes are optional. equation: 2C,H6 + 702=4CO2 + 6H, 0
  • . Balance the equations by inserting coefficients as needed. equation 1: 2Sb + Cl, – SbCl, equation 2: 2Mg, N, +HCI – MgCl2 + NH3
  • [References] Calculate the number of: a. nitrogen atoms In 34.8 g of TNT, C7H; N3 06 N atoms b. carbon atoms In 37.5 g of ethanol, C2 H; O C atoms of c. oxygen atoms In 0,770 g of aspirin, Co H O4 O a…
  • What is the concentration of N2 gas in surface waters? Please explain
  • If the partial pressure of carbon dioxide in the atmosphere were to increase to 500 ppm, what would the pH of rainwater be (assuming the only weak acid in the water is carbonic acid). Solve by any…
  • Which of the following represent the Lewis structure for Br – ?
  • . 37 Chapter 2 Quality Assurance and Legal Issues in Healthcare 19. A phlebotomist using an armband for patient ID 16. Risk factors in phlebotomy can be identified by a. adhering to national standar…
  • Some copper compounds are green, while others are blue. Is the color of a copper compound a physical property or a chemical property? Explain your reasoning.
  • no additional details I just dont get this. How many moles are in 0.0111 L of CO2? Your answer: 4.96 x 104 mol 0 0.249 mol 2.52 x 10-4 mol 1.84 x 10-26 mol Clear answer
  • . 32 Unit I The Healthcare Setting KNOWLEDGE DRILL 2-6: THE LITIGATION PROCESS Number the following phases in the litigation process in chronological order from 1 through 7. A. A deposition is taken…
  • 1 Enter the electron configuration for N. Q.2 Construct the Lewis Symbol for N. ÂDraw the Lewis Structure dot for N. Include all lone pairs of electrons and nonbonding electrons.
  • . 26 Unit I The Healthcare Setting LABELING EXERCISE 2-2: REFERENCE MANUAL Describe what each numbered item on the underlined portion of the reference manual page tells the reader about the laborato…
  • S + 6 HNO3 –> H2504 + 6 NO2 + 2H20 In the above equation how many moles of water can be made when 188.9 grams of HNO; are consumed?
  • . 25 Chapter 2 Quality Assurance and Legal Issues in Healthcare edical procedure ermission for medical LABELING EXERCISES procedures LABELING EXERCISE 2-1: MICROBIOLOGY QUALITY ASSESSMENT FORM at mu…
  • The data below was collected for the reaction BrO 3- +5Br – +H 3 O + Â→ 3Br 2 + 9H 2 O  Exp# Conc BrO 3 – Con Br – Conc H 3 O + Initial Rate (mol/dm -3 s -1 ) 1 0.10 0.10 0.10 1.2 2 0.20 0.10 0…
  • Given the following drugs in a urine specimen: Cocaine alkaloid Secobarbital (a derivative of barbituric acid) Carisoprodol (a neutral drug) ÂÂÂÂ Devise an analytical flow chart that will be us…
  • . dll WiFi Call – F’+ 4:54 94% Hamad A 2022/2/19 FF 4:31 app.crowdmark.com 7- crowdmark Q1c (3 points) 1 page submitted The concentration of Z is believed to be 100 times greater than W. Assuming th…
  • . dll WiFi Call – F’+ 4:50 95% Hamad 2022/2/19 F’+ 4:31 10 6 V=-20740x # 29.739 Ink 2 0.0002 0.0004 0.0006 0.0008 0.001 0.0012 0.0044 0.0016 0.0018 -2 -6 1/T From the graph the activation energy of …
  • Can I please get answers to the entire document.. b. Copper(II) chloride which is one of the salts used in fireworks is Copper(II) chloride.
  • Just b. Calculate molarity of 100g Nacl in 0.5 L of solution. Show work. Q 3.a. Define Molarity b. Calculate Molarity of 100 g Nacl in 0.5 L of Solution
  • . Write the equilibrium constant expression for this reaction: 2 H (aq)+ CO3 (aq) – H, CO, (aq) X 5 2. A tiny sample of an aqueous solution of two substances R and P is sketched below, as if it was …
  • . 22 Unit I The Healthcare Setting MATCHING Use choices only once unless otherwise indicated. Key 23 . 24 . MATCHING 2-1: KEY TERMS AND DESCRIPTIONS 25 . Match each key term with the best descriptio…
  • To convert 1 mol of iron (III) oxide to its elements requires 196.5 kcal: Fe203(s) + 196.5 kcal -> 2 Fe(s) + 3/2 02(g) How many grams of iron can be produced if 174.0 kcal of heat is absorbed by a …
  • What is the electron configuration of calcium, which has 20 electrons? Formula: MgSO4MgSO4 Name: Manganese (II) sulfite Which of the following statements identifies why this formula-name combination i…
  • How many liters of  H 2 gas are made when 1.50 moles  of Al are reacted @ STP?
  • FROM DRUG MONOGRAPH AND THE USP/NF ACETAMINOPHEN SPECIFICATION SHEET Â 1. Identify the test where Reference Standards are generally used 2. In the identification test using infrared absorption, name …
  • Please answer Â. select the formulas of any of the compounds that would be classified as binary compounds. CO2 HC,H,Oz NaHCO, CuzHaOn NaOH Mg(OH), HO MgSO. Fe,O, NH,OH CaCO,
  • Subject: Science, Topic: Rates of Reaction Can you please help me answer this assignment in Science? Thank you. Please see the image below:. Factors affecting rates of reaction RATES OF REACTION What …
  • . Naz Cop ( s ) + 2 HCI (ag ) – 2 Nacl(s) + H20(1) + CO219, K 2 ( 0 2 ( s ) + 2 HC ( ag ) , 2 KCI ( s ) + H20 ( ) + CO( 9 ). Na, Coheat 3 No reaction K-CO.Istheat, No reaction 2 NaHCO,(s) heat , Na,…
  • . VHF 12. What is the change in vapor pressure at 41 .C made from 142 g of water made by dissolving 73.0 g of potassium bromide? At 41 .C, the vapor pressure of pure water is 58.3 mmHg. Raoult’s Law…
  • . 8. Using the electronegativity table, predict whether each of the following bonds is nonpolar covalent, polar covalent, or ionic: a. Si-Br b. 1-1 C. Li-F d. N-P e. C-H f. Si-O g. P-Br h. S-F
  • The label on a soft drink bottle gives the volume in two units 2.0 L and 67.9 fl oz. using this information tell me how many milliliters is in 100.0 fl oz.
  • Deepen Performance Task: Isomers in reality! Direction: Provide a (1) concept map of how isomers are utilized in various fields in life. Example: medicine, transportation, agriculture etc. You are adv…
  • Experiment 6: Precipitation Reactions Start Beyond Labz, select the Inorganic laboratory. React each of the cations (across the top) from the top shelf with each of the anions (down the left) from the…
  • Someone help me answer this, it’s about Properties and Chemical Structure of Matter . I t’ll be a great help! Thank you!
  • Why do the atomic number of the periodic table increased, the specific heat capacity tends to go down?
  • One of the early methods to produce brick was to mix clay and straw and dry the mixture in the sun. This is an example of a   a. Physical process   b. Chemical process   c. One of the proc…
    • Option 1 – Laboratory Techniques Alternative Lab Report Instructions: For this investigative phenomenon, you will need to determine the densities of an unknown solid and liquid using different me…
  • Can you please solve the computer ARM assembly program below. Please show all your steps detailly and clearly. Write an ARM assembly program to convert temperatures from Celsius to Fahrenheit or from?…
  • Quiz will focus on describing fatty acids and saturation, hydrogenation and its relationship to trans fats, the two types of rancidity and their effects on food, how fat melting/crystallization effe…
  • What volume of 0.0105-M HBr solution is be required to titrate 125 mL of a 0.0100-M Ca(OH)2 solution?
  • Hello, I need help with these questions, please? 1. Â 2 & 3 4 & 5 6. 7. 8. Â. Ch 5 activity 1 1. Write the symbol and charge of ion formed from the following main group elements [3 ptSI Pota…
  • Can you answer these questions please show working out also thank you: Â Q2) A nutritional preparation contains potassium at a concentration of 16 millimoles L. Extra information: The molar mass of p…
  • A solution was prepared by dissolving 5.76 g of KCl # MgCl2 # 6H2O (277.85 g/mol) in sufficient water to give 2.000 L. Calculate (a) the molar analytical concentration of KCl # MgCl2 in this solut…
  • Hello, I need help with these questions, please? Â 1. Write the name & formulae for these compounds a. Â h2-1h13 b. 12a-12m 2. Name one ternary ionic compound and its formula. Â 3. Write the…
  • Which period in the periodic table has the highest value in specific heat capacity? Why? (period 1 don’t count)
  • Please help me in this thankyou. ANIMAL CELL 1. How big are mitochondria? 2. What does the Golgi apparatus do? 3. What is the difference between smooth and rough ER? 4. Where is the nucleolus found? P…
  • Can someone help me answer this, it’ll be a great help! Thanks! Â. Materials: Procedure: 1. Mix substances A and B. Substance A (oil) 2. Mix substances B and C. Substance B (distilled water) 3. Mix s…
  • Someone help me answer this, it’ll be a great help! Thank you! Â Q: 1. Using your knowledge of intermolecular and intramolecular forces of attractions, how would you explain the relationship of the s…
  • Please identify the polarity and the type/s of intermolecular forces that is present in each of the following systems given below. Please provide a brief explanation. Thank you. Â Note: Please list a…
  • . A. Write a balanced chemical equation, total ionic equation, and net ionic equation for the given pairs of salt solutions. [1] Pb(NO3)2 + K2504 – [2] FeCl3 + NaOH – CENTRO B. For the precipitate f…
  • Can you please help me with these questions? Â Please don’t give me just the answers. Please help me understand how to solve it. Thank you!. Practice Problems 4.4.1 – Predicting Whether a Precipitate…
  • What is the test to identify the haloalkane functional group?
  • Show your own work.. 2. Acid-Base Reactions a) One liter of treated drinking water has a pH of 9.8 which is quite basic. How much 0.01 N sulfuric acid in mL is necessary to bring the pH down to 7 assu…
  • Show your own workÂ. b) In your garage, there is a drum containing a mixture of degreasing solvents in water. One of the solvents is trichloroethylene and the measured gas phase concentration above t…
  • can you please help me fill out this chart. Comparing lonic and covalent compounds Covalent lonic Property Bonding Conductivity Exist as … Composed of … Jiffaleg com amosed brio Melting point Foun…
  • Make a concept map in one of the organic reaction of compounds learned. Â. Scoring Rubric Category 1 point 3 points 5 points Provided 1 sentence Explained less Explained well only Provided evidences …
  • Provide a concept map of how isomer are utilized in various fields in life Example medicine, transformation, agriculture etc. you are advised to use diagrams and illustration for the output.Â. Scor…
  • Titration of acid by a base Standardization of NaOH Mass of Initial buret Final buret Volume of Trial KHP reading NaOH used Molarity of reading (mL) NaOH (g) (mL) ( ML ) 1 (1) (2) (3) (4) (5) 2 (6)…
  • A ALEKS – Delta Hathorn – Learn LOW BATTERY www-awa.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3jH-IBjSzwu8qGsfmBxLWEUDiYeCmloA5WJ3oDXBhWblv4FFmfhQhHIzj4Et9DBb4p4V Do you want to disconnect iPhone&q…
  • Create/design and perform experiments that show at least 3 properties (related to the intermolecular forces) of 3 kinds of liquids. List the procedures that you will follow, write the resulting data, …
  • Question 6 B. Acid/base Dissociation constant Initial Solution Concentration PH [H*] [A] [HA] Ka/Kb (M) Weak acid (1 )_ (2) (3) (4) (5) (6 Response: 0.045 Response: 5.67 Response: 2.1×101-6 M Response…
  • Question 1 (1 point) The amount of oxalic acid in a sample of rhubarb is determined by reacting it with Fe 3+ . After extracting a 14.20 grams sample of rhubarb with a solvent, oxidation of the oxal…
  • Show complete solution for analysis of acetic acid (trial 1only) calculate the average mass of acetic Â. Analysis of Unknown Volume of NaOH mass (9) Acetic used (mL) acid Response: 100 mL ‘ Respons…
  • Answer this with complete solution Â. B. Acid/base Dissociation constant Initial Solution Concentration PH [H+] [A ] [HA] Ka/Kb (M) Weak acid (1) (2) (3) (4) (5) (6)
  • Challenge #2: How is the electrostatic force, FF, related to the separation distance , mr, between the two charges? Keeping the magnitude of charge on both objects constant, conduct a systematic study…
  • Fill a small glass jar all the way to top the water. 1. What do you think will happen if you were to add twenty-five centavo coins to it? Explain why it will overflow. Â 2. Try adding coins one at a …
  • Compound S o (J K -1 mol -1 ) A 4 B 26 C 1 D 71 At 298 K, Δ G o is 137 kJ for the reaction 3A + 2BÂ→Â3C + 3D Calculate Δ H o for this reaction in kJ.
  • The rate of the overall reaction SO2(8) + 2 02(8) <> SO3(8) changes with the concentration of SO, as shown below [SO,] Which of the following mechanism predicts this behavior?. Which of the foli…
  • I only need is the solution because the answer is provided below Answer: Response 0.04 is answer in number 1. B. Acid/base Dissociation constant Initial Solution Concentration PH [H+] [A ] [HA] Ka/Kb …
  • I need is the solution, the answer is provided below  Answer:  Response 10.0 is answer in number 1 Response 1.00ml answer in number 2 …….. Analysis of Unknown Volume of Acetic Trial Acid Initi…
  • I need is solution and the answer is provided below! Answer:Â. C. Titration of acid by a base Standardization of NaOH Mass of Initial buret Final buret Volume of Trial KHP reading reading NaOH used M…
  • Activity 3 The Octet Rule Grade Level: 11-STEM Date of Submission: January 7. 2022 I. OBJECTIVES: . apply the Octet Rule in the formation of molecular covalent compounds (STEM_GC11CBIId-g-76) II. MATE…
  • Analyze the pictures and graph of the properties of liquids and complete the table by answering the questions under prediction. Provide explanation for each.. 1. Direction. Analyze the pictures and gr…
  • What is the trend for atomic size across a period? Why is this the trend ? 2. What is the trend for atomic size down a group? Why is this the trend ? 3. Please circle the atom with the larger atomi…
  • Can someone help me construct f/o/our/ stanzas poem on REDOX Reaction? Â A redox reaction is defined as a reaction in which oxidation and reduction take place simultaneously . In fact, both these pro…
  • Determine the drying time for a 10-um-diameter water droplet at 0% relative humidity and 293 K [20°C]. Calculate an answer with and without correc tion for droplet temperature depression.
  • Question 1 (1 point) I’ve taken 411 mLs of acetic acid with a concentration of 0.302 mol/L and mixed it with 353 mLs of sodium acetate with a concetration of 0.958 mol/L. To this solution, I add 10 …
  • Â Â 2. Â Â 3. Â Â 4. Â 5. Â Â Â Â Â Â Â Â Â Â Â Â Â Â. A molecular biologist measures the mass of cofactor A in an average yeast cell. The mass is 60_52 pg. What is the t…
  • Please help Â. Table 1 – Signals of Cast standards and unknown samples. [Ca)+]/[Na+] [Ca +] Emission (ppm) 1 2 3 Avg 0 (blank) 2694.018 2716.238 2734.244 2714.833 2 855.4037 869.8925 894.2058 873.167…
  • WRITING FORMULAS Write the correct formulas in the chart below. Two formulas have been written for you Remember. The plus oxidation number goes first. Then criss-cross the oxidation numbers For exa…
  • NAMING COMPOUNDS Eight compounds are listed in the chart below. Each one contains at least one radical. Nan compound. Choose from the list below. Note: In a compound, the hydroxyl radical (OH) is call…
  • The chart above shows eight common polyatomic ions. Now look at the chart below. The names of the eight radicals are listed in Column A. Do the following: . In Column B, write the formula of each poly…
  • Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is: 2Mg(s)+O2(g)→2MgO(s) When 10.1 g of Mg are allowed to react with 10.5 g o…
  • In the laboratory a student combines 34.8 mL of a 0.190 M silver fluoride solution with 28.0 mL of a 0.422 M nickel(II) fluoride solution. What is the final concentration of fluoride anion ?. [Review …
  • . EXPERIMENT 6: Air Quality Monitoring Introduction Humans can survive for couple of days without water but the same case cannot be observed without the air we breathe. A lot of air pollutants are p…
  • this all about kinetic molecular model.please help me..your answer must be based from your experiment. Activity 1. Travelling Water Experiment! property of Liquid and their Intermolecular Forces. The …
  • Important Note:    Use the following standards for all your calculations. STP = 273.15 K and 101.325kPa SATP = 298.15 K and 100.000kPa    Question 1Â(1 point)         …
  • NITROGEN AND PHOSPHORUS bonding patterns. Repeat the process above for these molecules containing either nitrogen or phosphorus.
  • group 13 14 15 16 17 18 Ne Al Ar Ga Ge As Kr NEXT: Fill in the above elements where they would go in the partial periodic table shown. 6. Can you see the pattern in the number of covalent bonds that e…
  • POSSIBLE DIATOMIC If it actually exists: name it. Ball and Stick Model Sketch Type of Bond between MOLECULE? If it doesn’t actually exists write Atoms "no" and cross off the formula
  • When aqueous solutions of ammonium carbonate and chromium(II) nitrate are combined, solid chromium(II) carbonate and a solution of ammonium nitrate are formed. The net ionic equation for this reaction…
  • For the following molecules, draw the Lewis formula, structural formula, and provide the molecular shape : (7.5 marks) CH 3 CH 2 OH PCl 3 C 2 H 2 Â Â Â What is the main difference between an ato…
  • What solution should be used as the reference sample in the colorimetry measurements?
  • . The distance between the red and green balls at the corners of this tube is 1651 pm: Calculate the distance between the red and blue balls. Round your answer to the correct number of significa…
  • REACHING OUT Oxidation numbers can help you find a formula. It goes the other way too. A formula can help you find the oxidation number of the elements in a compound. For example, Nil, is the formula …
  • 1,5 pm of CaCO, was dissolved in hydrochlone acid and the solution made up to 1000mL with distilled water. 50mL of the solution required 32 mL of EDTA solution for titration. S0ml. of hard water sampl…
  • Determination of the Formula of a Metal Oxide  Part A) Show calculation and explain how you get? Calculate the percentage, by weight,Âof sulfur (S, molar mass 32.06) in silver sulfide, Ag 2 S. Re…
  • hi! please helppp  Â. ARELLANO UNIVERSITY MODULE IN GENERAL CHEMISTRY 2 VITY/EXERCISES ection: Explain your observations. ART 1 . Fill a small glass jar all the way to the top with water. 2. What d…
  • write the correct formulas in the spaces belong. Three formalis Base Bent writter fire yet NONMETALS S-2 HCI 2. H.O A1+3 6. 7. 10 ALI, METALS Ca*2 11. 12. 13 16. 10 17. 18 19 15 14. Mg*2 21. 22 23. 30…
  • Answer the calculation buy using the following data Â. 20.3 nperature of water used in pipet C rrected temperature C Trial 1 Trial 2 Trial 3 ss of Erlenmeyer + ~ 10 mL H20 (gross mass) 59.289 50.443 …
  • <Assignment 5 – Chapter 05 Problem 5.36 – Enhanced – with Feedback < 5 of 22 Enter an abbreviated electron configuration for phosphorus: Express your answer in complete form, in order of increas…
  • using the the data giving calculated the next step. 10:52 7 Photos Screen Shot Done 80 E. Measuring the Density of Antifreeze 81 21.4 82 Temperature of antifreeze C 83 Trial 1 Trial 2 Trial 3 53.788 5…
  • Data : Mass of KHP Trial 1 = 0.567g Trial 2 = 0.557g Trial 3 = 0.560 g  Volume of NaOH Trial 1 = Initial burette reading = 0.50 mL and final burette reading = 36.00 mL Trial 2 = Initial burette read…
  • Shows the formuka using the dataÂ. E. Measuring the Density of Antifreeze 21.4 emperature of antifreeze C Trial 1 Trial 2 Trial 3 53.788 53.883 54.147 Mass of flask + antifreeze 43.962 44.138 44.131 …
  • . compound length of highlighted energy of highlighted bond bond H H H-C-C- – H – choose one – choose one -v H H H H – choose one – – choose one -v H-CEC- :0: – H H-CEC- :0: – H – choose one – – cho…
  • If 55.5 g of phosphorus and 25.5 g of oxygen react to produce 25.5 g of Tetraphosphorus decoxide: Calculate the theoretical yield of tetraphosphorous decoxide Identify the limiting reactant Identify t…
  • What volume of oxygen at 323.0 K and a pressure of 147.4 kPa is produced by the decomposition of 139.7 g of BaO2BaO2 to BaOBaO and O2O2?
  • Determine the wavelength and frequency for each of the following: a photon of green light with an energy of 3.32 x 10^-19 J a photon of ultraviolet radiation with an energy of 3.49 x 10^-18 J Â 3…
  • Question 1 of 15 The electron configuration for a chlorine atom is: 1s2 2s2 2p6 352 3p5. What electron configuration represents the electrons that make up only the valence electrons for a c…
    • What volumetric flowrate (in litres per minute) would be required to have fully developed turbulent flow in a tube with an outer diameter of 1.25 inches and a wall thickness of 0.1 inch? Use th…
  • are they diastromers enantiomers or identical. CI a. C. Br, CH3 HaC Br H- H&C CI CH3 OH OH H CH3 H H b d. CI- J..CI CI- -CI H&C H H2C CH3 CI CI
  • i need to convert these projections to skeletal form and give their iupac names. H H H H H CH3 a. b. Br II Br CH3 HH C. d.
  • n the lab, you dissolve an unknown mass of silver nitrate (AgNO 3 , 169.87 g/mol) in 93.6 g of water at 22.8 °C. Once the silver nitrate has dissolved, the temperature of the water is 15.1 °C. The h…
    • (1 pt) Benzene Compound AHform (Hartree) H2 Benzene 1,3-cyclohexadiene Cyclohexene Cyclohexane First AHhyd (KJ/m
  • Answer the following: a) List the temperature range that corresponds to H2O being solid ice. b) List the temperature range that corresponds to H2O being liquid water. c) List the temperature at whi…
  • Question 1: (1 pt each) Give the following structures an unambiguouse. Preferably IUPAC! =
  • . Mass Mark Given & Unknown.. Mass 3 How many grams of C H grams grams 8 must be used to produce 378Vi PERIODIC TABLE 3.75 X 1024 molecules of CO, gas? 10 0 MOLAR MASS Particles anknows BALANCED…
  • Thank you!. Mass Mark Given & Unknown .. Mass 2 ; grams grams How many liters of H gas are made when 1.50 moles of Al 0100183d 378VI PERIODIC MOLAR MASS TABLE 10 0 given 9 MOLAR MASS are reacted @…
  • LABORATORY REPORT FORM  Part I. Determination of the Formula of a Known Hydrate     (CaSO4.5H2O) 1. Mass of empty evaporating dishÂ_     38.173__ g 2. Mass of evaporating d…
  • What is the expression for the equilibrium constant for the reaction below? 2NH3(8) > N2(8) + 3H2(8) O a Keq [N2] [H2] = [NH 3] [NH 3 ]2 Keq = [N2] [H2] O Keq = [N2] [H2]3 [NH 3]2
  • What is the expression for the equilibrium constant? 2H20(1) + 2H2(8) + 02(8) O a Keq P2 H, Po2 PHO Ob) Keq = P2 H, P02 O c Keg = P’ H2 PO2 PHO O d Keg = PH, Poz
  • Below is an equation for the production of sodium nitrate. What mass (in g) of sodium nitrate (NaNO 3 , 84.99 g/mol) can be produced from the reaction of 160 g of nitric acid (HNO 3 , 63.01 g/mol) and…
  • Suppose you are a tour bus company and need full tour buses in order to make a profit. Each tour bus can seat 56 passengers, with rows of 4 seats (with an aisle down the middle between every pair of s…
  • Why was it necessary to make diluted bleach solution before taking an aliquot to tirate
  • d) Nitrate is commonly used to determine the reaction of coloured species that are absorbed at 550 nm. Table 1 shows the result of a sample containing an unknown amount of nitrate using the standard a…
  • . Fill in the name and empirical formula of each innit: compound that could he formed from the ions in this table: Some hull: compound: :mplrlul l’urmull name at complain!
    • Consider the tertiary structure of proteins. Identify and draw 3 types of interactions observed between amino acid residues in the tertiary structure of proteins. b. Give two differences betwe…
  • Question 14 of 15 Using the image of the galvanic cell below, what is the reaction that occurs at (a) the anode and (b) the cathode? 2 (ed) A. Anode: Zn(s) – Zn2+(aq) + 2e- Cathode: Cu(s) -…
  • KINETICS AND EQUILIBRIUM E Using a rate law The rate of a certain reaction is given by the following rate law: rate = k [ N 2 ] [H2 ] Use this information to answer the questions below. What is the re…
  • How many additional grams of KNO3 are required to keep the solution (from 2) saturated during the temperature change from 35.0 °C to 45.0 °C, mass of KNO3 2.561 g, n of mol=0.02533 Temperature (ËšC)…
  • . (c) Figure 1 show the shape of the peaks in gas chromatography that causes loss of column efficiency. Determine the type of shape and identify two possible solutions to fix it. INJ Time (mm) (3 ma…
  • According to the balanced equation: N 2 (g) + 3 H 2 (g) → 2 NH 3 (g), how many L of NH 3 gas can be formed when 3.9 L of H 2 gas reacts with excess N 2 if all gases are measured at the s…
  • An ideal solution is made by dissolving 0.398 moles of a non-volatile solute in 3.00 moles of water. When measured at 100°C, what is the pressure in torr of water above this solution?
  • How many grams of the non-electrolyte C 3 H 8 O 3 must be dissolved in 701g of water to produce a solution whose calculated boiling point is 101.00°C?
  • please explain give complete answer no copy paste
  • . Which of the following is an example of a homogeneous catalyst? Select all that apply. ‘ The destruction of atmospheric ozone ‘ Making ammonia ‘ Acid catalysis ‘ Making nitric acid ‘ Enz…
  • . M5LE2 Hand-In Assignment: Identifying Conjugate Pairs In this assignment, you will identify conjugate pairs for some chemical reactions. Unless you are instructed differently this assignment is wo…
  • . Consider the following reaction and experimental data. Trial [Ajo [BJo [C]o Rate (M/s) 0.34 0.61 0.34 2.645 2 0.68 0.61 0.34 5.29 0.34 1.22 0.34 5.29 0.34 0.61 0.68 2.64 Two mechanisms are propose…
  • D Question 7 1.5 pts The heat capacity of hydrogen may be represented by Cp,m = (1.554 + 0.00227) J K 1 mol-1 Calculate the total change in entropy for the irreversible heating of 4.8 moles of hydroge…
  • I did one solution but need a second one.  Using this lab. http://chemcollective.org/vlab/90  Must show screen shot.
  • The heat capacity of hydrogen may be represented by Cp,m = (1.554 + 0.00227) J K 1 mol-1 Calculate the change entropy of the system for the irreversible heating of 2.9 moles of hydrogen from 334 K to …
  • Question 1 1 pts A sample of monatomic gas is initially at 330 K and 1.0 atm is expanded from 1.61 L to 4.63 L and simultaneously heated to 364 K. Assume the gas is ideal and use the initial parameter…
  • How many grams of CO 2 are in a 5.04 L sample of CO 2 if the pressure of the gas is 5.30 atm and the temperature of the gas is -57°C?
  • . (c) Figure 1 show the shape of the peaks in gas chromatography that causes loss of column efficiency. Determine the type of shape and identify two possible solutions to fix it. INJ Time (mn) (3 ma…
  • . O manitoba.brightspace.com MOLE1 Hand-in Assignment: Predicting Spontaneity In this assignment, you will compare some metals in terms of oxidation difficulty and predict the spontaneity o…
  • . c) An analysis of acid mixture was conducted using reversed-phase liquid chromatography with 20 mL/min flowrates and 10 cm column length. The retention time of Y acid was 4.4 min with a width of 1…
  • rlvatlon Obtain an expression for the most probable radius at which an electron will be found when it occupies the hydrogen ls orbital. (Hint: Differentiate the Is wave function in the Complex Hydroge…
  • . 2. Given the following effective nuclear charge (Zeal a. Calculate the energy of all valences atomic orbitals of K and Cl b. Using the atomic orbital energy calculate In a.) draw a MO-correlation …
  • 8A 1A H 2A 3A 4A 5A 6A 7A He Li Be C N 0 F Ne Na Mg 3B 4B 5B 6B 8B 1B Si p S CI Ar K La SC Mn re LO NI CU zn Ga Ge As Se Br Kr Rb ST ND MO TC RU Rn Pd Ag CO In Sn Sb Te ke US Ba La a Re P1 AU Hg PD BI…
  • 1 2 atomic absorption spectroscopy and interference involved in AAS analysis. 1. Select the following statement that is not related to the principles of Atomic Absorption Spectroscopy (AAS). A. specif…
  • one factor that is insignificant to AAS and chromatographic techniques of separation. 4. AAS is the most widely used instrumentation for the analysis of metal and traces metal samples. State one facto…
  • chromatographic technique. 6. The separation occurs on a thin film of the immobilized solid support surface of liquid stationary phase. The solute moves to and pro between the stationary phase and the…
  • 7 8 9, column resolution, gas chromatography and Gc carrier gas. 7. Column resolution is an indicator to identify the selectivities and efficiencies of the column ability to separate two or more analy…
  • 10,11,12 carrier gas, retention time and technique for hplc method. 10. Select which of the following is not a feature of carrier gas used in gas chromatography? A. It must be chemically inert B. It s…
  • 13,14,15 reversed phase hplc, refractive index detector and degassing mobile phase of hplc. 13. Reversed phase HPLC refers to the condition of stationary phase and a mobile phase of separation. Select…
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â. c) The following organic solvents were used in reversed phase HPLC analysis. Propose the elution or…
  • describe sample properties that suitable for GC and HPLC analysis. (marks) b) Describe the sample properties that would be suitable for; i) Gas chromatography (GC) analysis ii) High-performance liquid…
  • Instructions: Using information provided in material 1 of Introduction on Univariate and Bivariate Analysis, particularly about addiction and services referred, conduct a chi-square analysis using IBM…
  • sketch standard addition graph and determine concentration of nitrate compound. d) Nitrate is commonly used to determine the reaction of coloured species that are absorbed at 550 nm. Table 1 shows the…
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â. d) Gasoline samples containing pollutant S was analysed using GC-FID. The data of analysis was show…
  • Consider only ions with charges of +1, +2, -1 and -2, or neutral atoms, give the symbols for 4 species that are isoelectronic with the selenide ion, Se2- 2. Consider only ions with charges of +1, +…
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating.
  • predict type of interference caused by formation of metal ion-anion compounds and describe methods used. b) Predict the type of interference caused by the formation of metal ion-anion compounds which …
  • Chapter Liquid Chromatography Â. QUESTION 4 a) Explain the term gradient elution mode in HPLC (2 marks) b) Differentiate between gel filtration and gel permeation chromatography. (4 marks) c) The fol…
  • please help me solve number 74 a-d. that x b. 0.100 M MISSED THIS? Read Section 17.6; Watch KCV 17.6, IWE 17.5, 17.7 a. 0.500 M C. 0.0100 M 66. Determine the pH of an HF solution of each concentration…
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â. 14. Select the true statement(s) of the refractive index detector in HPLC? A. It is more sensitive …
  • Chapter Gas Chromatography Â. QUESTION 3 a) Gas Chromatography (GC) is one of the useful techniques in analytical chemistry. Give two important components in GC. (2 marks) (b) Choose the suitable GC …
  • calculate capacity factor(k’), find resolution of acid and determine average theoretical plates in column. c) An analysis of acid mixture was conducted using reversed-phase liquid chromatography with …
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â Â. 13. Reversed phase HPLC refers to the condition of stationary phase and a mobile phase of separa…
  • choose suitable GC detector. (b) Choose the suitable GC detector (Thermal conductivity, Flame lonization or Electron capture) which are described by the given statements. i) Organic compounds that can…
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â. 10. Select which of the following is not a feature of carrier gas used in gas chromatography? A. It…
  • determine type of shape in gas chromatography. (c) Figure 1 show the shape of the peaks in gas chromatography that causes loss of column efficiency. Determine the type of shape and identify two possib…
  • Chapter Atomic Spectroscopy  Â. QUESTION 1 a) Explain the difference of an operational principle between flame atomic absorption spectroscopy (FAAS) and flame atomic emission spectroscopy (AES). …
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â. 8. Select which of the following ways gas chromatography can be performed? A. Only in columns B. On…
  • Task ———————- – Write a 1-page story describing the “Tungsten” Element – Also make sure to write a story and add the requirements in the story somehow – ÂI want a story not a page of an…
  • amount of s presence in the sample. d) Gasoline samples containing pollutant S was analysed using GC-FID. The data of analysis was shown in Table 2. Table 2 Injection tR (min) peak area 21.1 ppm tolue…
  • 3 1 5 1. An experiment has been designed to test food preference in dogs. In this experiment, a dog will be given the opportunity to choose between their current food and four new food options. To tes…
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â. 6. The separation occurs on a thin film of the immobilized solid support surface of liquid stationa…
  • gradient elution mode and gel filtration and gel permeation. a) Explain the term gradient elution mode in HPLC (2 marks) b) Differentiate between gel filtration and gel permeation chromatography. (4 m…
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â. 5. Indicate the contrast statements of the following chromatographyc techniques of separation. A. A…
    • The following organic solvents were used in reversed phase HPLC analysis. Propose the elution order of the listed solvent and give a reason for your answer. Propanol, Isopropyl ether, Propanoic aci…
  • propose elution order of solvents. C) The following organic solvents were used in reversed phase HPLC analysis. Propose the elution order of the listed solvent and give a reason for your answer. Propa…
  • help me answer this questionÂ. c} An analysis of acid mixture was conducted using reversed—phase liquid chromatography with 2D mUmin flowrates and 10 cm column length. The retention time of Y acid …
  • Hi,kindly reply with quick and correct,accurate answers and working. I will give helpful rating. Â. 1. Select the following statement that is not related to the principles of Atomic Absorption Spectr…
  • help me answer this question. d) Gasoline samples containing pollutant S was analysed using GC-FID. The data of analysis was shown in Table 2. Table 2 Injection tR (min) peak area 21.1 ppm toluene 10….
    • Choose the suitable GC detector (Thermal conductivity1 Flame Ionization or Electron capture} which are described by the given statements. i} Organic compounds that can be burnt ii) Halogen—conta…
  • . One day in lab, while taking apart a complicated distillation apparatus, your friend Keisha (an expert chemist) says this: "Ammonium salts heated with aqueous hydroxides form ammonia, water, …
  • HELP ME ANSWERS THESE QUESTION. JUST WRITE THE ANSWER NO NEED TO EXPLAIN FOR EXAMPLE, 1. A 2. ? 3. ?. 8. Select which of the following ways gas chromatography can be performed? A. Only in columns B. O…
  • Bb My G X | "Pira X myU X Bb Chap X Bb awww-awu.aleks.com/alekscgi/x/Isl.exe/10_u-lgNslkr7j8P3jH-IQiu5JxZnxj_1SoekWMaP1AsIfEhnC179H4Snwuo-Q2HNIfS3CZF4GOru6vXgDhRj2-iuPKint8zYCcYf0Bp… ( Gmail Yo…
  • HELP ME ANSWERS THESE QUESTION. JUST WRITE THE ANSWER NO NEED TO EXPLAIN FOR EXAMPLE, 1. A 2. ? 3. ?. 1. Select the following statement that is not related to the principles of Atomic Absorption Spect…
  • Find a specific application of chemical equilibrium that is applied in industries online. Describe this in a short but detailed, please do it in a paragraph form. Please provide the link of the chosen…
  • use the data above to draw graph and questions 5,6. 10 – 4 Chemistry with Computers Vapor Pressure of Liquids DATA AND CALCULATIONS Atmospheric pressure 110.4 kPa Substance Methanol Ethanol Trial 1 2 …
  • how can i link those questions to Acidosis and Alkalosis ? Â 6. Calculate the concentration and volume of a solution given solute and solvent parameters. 7. Predict the properties of and identify red…
  • An experiment has been designed to test food preference in dogs. In this experiment, a dog will be given the opportunity to choose between their current food and four new food options, To test this…
  • . 4. In 2005, Yellowstone Park had 112 wolves, which was a 75% increase from the number of wolves re-introduced into the park in1995-96. How many wolves were introduced into the park at that time? (…
  • . er as a whole number.) were introduced into N 5. The moon is, on average, 238,000 miles from the Earth. The newly launched Webb telescope is on average, 1.5 X 10 km from the Earth. What percentage…
  • Carbon in the Oceans (14 points) In class, we showed that the pH of the ocean is 8.2 assuming that it is at equilibrium with both atmospheric CO2 and calcium carbonate. We also qualitatively discus…
  • The initial rates listed in the table for the following reaction Â10 -1 Trial  Initial [A]  Initial [B]  Initial Rate   (M)  (M)  (M/min) 1  0.200  0.100  6.00 × 10 -2 2  0.100…
  • TABLE I: Data Table Parameter CuSO4.X-H20 CoCl2 .x-H20 Mass of crucible and lid (g) Mass of crucible, lid and sample (g) Mass of sample (g) Mass of crucible, lid and sample No Entry Here No Entry Here…
  • . 10 ) X "OWLV2 | Online teaching and lea x + https://east.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References To convert 1 mol of iron(III) oxide to …
  • In 2009, the fishing fleet caught 90.0 megagrams of fish. In 2021, it caught 85 megagrams of fish. What is the % decrease?
  • Chapter ÂAtomic Spectroscopy Â. QUESTION 1 a) State the principle of atomic absorption spectroscopy (AAS). (2 marks) b) The flame is the most important part in flame emission spectrometer (FES). Dis…
  • FSS 220 – Lipids Lab Activity 3 Post-lab Questions: 1. Which food (chocolate chips or potato chips) contained more fat based on the % you calculated? Â 2. Is yourÂcalculation in line with what is pr…
  • . Net dipole moment of PH, O H H H O I-D: H H O I-0: H H No net polarity
  • . Consider a solution containing two volatile liquids A and B where the mole of B and A are 1.2 mol and 0.8 mol, respectively. The vapor pressures of pure liquid A and B at 25 C are 137.0 torr and 3…
  • . Question 6 (3 points) [You can attach an image/capture of your hand-written work for this question]. Given the enthalpy change for the reactions below: A + J -> D + G +E AH = -201 KJ 2G + 2M – …
  • . Question 5 (3.5 points) The decomposition of dinitrogen pentoxide is first-order N205(g) – 2 NO2(8) + 1/2 02(8) If we start with a 5.54-g sample of N205 and have 1.52 g remaining after 169s, a) (1…
  • . To determine how many Calories an organic product X contains, 309 g X was burned completely in a bomb calorimeter. The process caused the surrounding water temperature in the calorimeter to increa…
  • Chem 111 Chemical Reactions of copper lab answers
  • . A chemical reaction takes place in an expandable container. When it occurs, the volume of the container compresses from 5.00 L to 2.00 L under 3 atm and a heat of 1234J is released. Calculate the …
  • . 3 H2 SO4 (ag) + 2Al(s) – Al2 (SO4) 3 (aq) + 3H2(9) AH = -1063 kJ a. (2pts) What is the enthalpy change when 25.3 mL of 0.430 M sulfuric acid reacts with 0.436 g aluminum? b. (1pt) Use the course’s…
  • . X OWLV2 | Online teaching and lea X + https://east.cengagenow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-take [References] For the reaction: pt pt 2 N2(9) + 3 02(9) -+ 2 N2…
  • . Which of the following pairs of substances has the higher vapor pressure at 298 K given first? A) H,O, H,Se B) CF , CBr. C) Kr, Ne D) CH,, CH,. E) CH,OH, CH,OCH,
  • LOW BATTERY awww-awu.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3jH-IQiu5JxZnxj_1SoekWMaP1As1fEhnC179H4SwwZD8GsZzH6GpFNjCTUE2BMk4Svn Your Mac will sleep soon unle power outlet. Gmail YouTube Maps Ex…
  • La energia minima necesaria para extraer un electron de una lampara sodio es de 2,3 eV. Explique si se producira el efecto fotoelectrico cuando se ilumina una lamina de sodio con las siguientes rad…
  • JH-IQlubJxZnx]_1SoekWMapAsIfEhnC179H4SwwZD8GsZzH6GpFNjCTUE2BMk4Svn Your Mac will sleep soon power outlet. Gmail YouTube Maps Extra Credit (Limiting reagents) Question 2 of 3 (1 point) | Question Attem…
  • un laser de un semiconductor empleado en un reproductor de CD tiene una longitud de onda de salida de 780 nm y un nivel de potencia de 10MW (mega watts) Cuantos fotones incidenten la superficie de …
  • How can the three rules, Aufbau principle, Pauli Exclusion principle, and Hund’s rule, potentially apply to passengers filling in a TTC bus? Be specific in your answer. You can even discuss how these …
  • . Which of the following statements is incorrect? A) Molecular SOIIdS typically have high melting points. B) The binding forces in a molecular solid include London dispersion forces. C) lonIc …
  • Question 1 Of 3 (1 point) | Question Attempt: 1 of Unlimited 2 3 Gaseous ethane (CH, CH3 ) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2 0). Suppose…
  • . What quantity of heat, in kJ, is required to convert 45.0 g of ethanol (C,H,OH) at 23.0 C to a vapor at 78.3 C (its boiling point)? (specific heat capacity of ethanol = 2.46 J/g . C; AHvap = 39.3 …
  • Which point is the Gas phase?  2. from between which two points does melting take place?  NEXT PHOTO  3. which point on the diagram is at the normal boiling point for this substance 4. Po…
  • Polarity of bonds in Co2 Â C=O :Â a. nonpolar b. Dipole with negative at C c. Dipole with negative at O
  • I need help with a few questions on my sheets. What is the balanced reaction that occurs when HCL is added?  what is the NET ionic reactionÂ. Reaction #2 – Barium Chromate Equilibrium What is t…
  • Instructor REPORT SHEET LAB Energy and Matter 5 B. Graphing a Cooling Curve 1. Time (min) Temperature (C) 71.1 65.2 58.0 52.1 45.2 40.1 37.2 41.1 41.2 41.0 41.0 41.0 41.0
  • We are watching this video and following along with questions, I have done most of it but need some help with the three questions on here. It is time stamped to this exact page  https://www.youtub…
  • Worksheet Week 5 F Nitrogen gas (N2) and hydrogen gas (H2) react to form ammonia gas (NH3). a) ÂWhat is the recipe (balanced chemical equation) for this reaction? b) ÂAssume the picture on the right…
  • Please answer questions 1-8 No explanation needed Pls type out the answer and not handwritten.Â. Question 1 For the reaction below, the equilibrium constant is Kc = 3.2x 10-10 at 25 .C. P…
  • A 50.00 mL aliquot of a hard water sample is titrated with 15.00 mL of 0.01280 M EDTA. A second 50.00 mL aliquot portion is made sufficiently alkaline with NaOH to precipitate the Mg ions. The pre…
  • Worksheet Week 5 F Urea is prepared by reacting ammonia with carbon dioxide: 2NH3Â(g) + CO2Â(g) → (NH2)2CO (aq) + H2O (l) . In one process, 637.2 g of NH3Âare treated with 1142 g of CO2. a) Â…
  • CHMI30 Score Name Section Date Post-lab Assignment Show calculation details. include units, and give the correct number of significant digits. 1. A 14.325-gram silver sample was heated to 98.1 .C in a…
  • How do you calculate the mass of the limiting and excess reactants in a chemical equation?
  • . Question 1 For the reaction below, the equilibrium constant is Kc = 3.2x 10-10 at 25 .C. Pb(s) + 2 Cr3+(aq) = Pb2+(aq) + 2 Cr2+(aq) 1 point Excess Pb(s) is added to a solution for w…
  • -lab Assignment For full credit, write complete sentences to explain your answers. 1. Which of the following processes requires more heat energy? a. raising the temperature of 100. g of water by 10.0 …
  • . Net dipole moment of CCl O : CI: : Chu.C ci CI O : CI: + : ChuC CI ci; O : CI: : ChuC ci No net polarity
  • Draw TWO acceptable resonance contributors of the conjugate base of each acid listed below. Label any nonzero formal charges and include lone pairs of electrons if there are any. (10 points) a. =O …
  • What is the calculation if you put in 73.66 instead of 75.84jQuery22404673409153427075_1645222591048. AT 75.84-25 .C- 41.95-25 .C =16.945 . C/M M 3-1 M Then: AT 50-25 . C =16.945 . C/ M M M AT 50-25 ….
  • 10 ; What mass of iron (III) oxide is produced when 3.88 X 1022 molecules of oxygen reacts with excess iron? 4Fe + 30 – 2Fe O 2 2 3
  • Question Calculate the pOH of a solution that has [ H, Of] = 0.050M at 25. C. Select the correct answer below: 12.70 1.30 O 7.00 O 0.050 FEE
  • . BIO LAB 6 REPORT Name Organic Molecules Last 101 Value 5 points (Sp2022) Section_ Table Date e.Q. Mon 12:30 DIRECTIONS: Answer Questions #1 – #4. The value of this report is 5 points. The value…
  • Complete solution. The following data are obtained from the Experiment Determination of Molar mass Using Freezing point depression Mass of Lauric acid = 80.00 g Mass of unknown = 10.00 g Lauric acid L…
  • Can any help explain why this statement is true?. We know oil and water do not mix, so explain using the terms entropy and intermolecular force (at a minimum) why this statement is true.
  • Need help solving problems 1-4. 1. In an industrial tank a company wants to put 1000.0 kg of Hydrogen Cyanide (HCN). The material will vaporize into a gas inside the container. The company has a syste…
  • Complete the solution thank you. The following data are obtained from the Experiment Determination of Molar mass Using Freezing point depression Mass of Lauric acid = 80.00 g Mass of unknown = 10.00 g…
  • . Which of the following statements is true about spectrophotometry? {may be more men one) [:1 A. monochromatic light is light of single wavelength C] B. it can be performed with different types of …
  • Forensic evidence is increasingly used in legal proceedings. What technologies do forensic chemists used in this field and how do they work on a chemical level?
  • Question 5 Titration of Acid and Base 1. Standardization of NaOH The following data are obtained for the standardization of NaOH Trial 1 Trial 2 Mass of KHP 0.2100 g 0.2090 g Initial buret reading 2.0…
  • Assign the formal charge to the atoms that require it in the following structures.. 10. Asigne la carga formal a los atomos que lo requieran en las siguientes est H C=N=NO H H H-C H =O Se O 1 . . …
  • ……. …. The rate constant for a reaction is affected by which factors? I. an increase in temperature Il. a change in the concentration of the reactants Ill. the addition of a catalyst O I and II …
  • Using the VSEPR Theory, assign to each compound the group to which it belongs (AX2, AX3, AX4, AX5, AX6, AX2F2, AX3E). Indicate the state of hybridization of the element center and the geometric st…
  • A rectangular block of metal has dimensions of 2.7 cm × 3.2 cm × 1.9 cm. The mass of the block is 48.9 g. What is the density of the block of metal in g/cm 3
    • A sample gives you a %T of 91. Calculate its absorbance. (rounded up to the second decimal) Â Â Â (b) A sample in a 2 cm test tube gives you an absorbance of 0.28. Another sample of the same mo…
  • The staging area manager accounts for all incoming emergency response units and assigns resources from the staging area to their tactical assignment at the request of the O A. logistics section chief …
  • please show me how to do this step by step. One 55 g serving of a cereal provides 281.0 mg of sodium, which is 11.2 % of the recommended daily allowance. Determine the amount of sodium (in grams an…
  • Find two common household products that contain a polyatomic ion. Each product should have a different polyatomic ion. Research the purpose of that polyatomic compound in each of your products. What p…
  • How many milliliters of bromine, Br 2 , would be needed in order to have 18.5 grams of bromine? The density of bromine is 3.10 g/mL.
  • If there are 1.20 x 10 24 argon atoms, how many moles of argon is that
  • If there are 4.50 moles of beryllium, how many beryllium atoms is that
  • What is the rate for the zero order reaction A –> Products when [A] = 0.200M? (k=9.47 M/min) Given molarity: 0.200 M Given k: 9.47 M/min Integrated rate law equation on zero-order reaction Hi! I’m…
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  • whatÂis the diff between real science from pseudoscience. List three examples of each Once you are comfortable telling them apart, identify a claim or idea that someone would come across in daily l…
  • What element is the electron configuration representing? 1s2 2s2 2p6 3s2 3p6 4s2 OF ORu Oca OGa
  • ¿Cuánto dióxido de carbono liberas tú al ambiente, yendo de tu casa a tu centro de estudio, en vehículo de combustión interna? ¿Que procedimientos se deben hacer?
  • 2#. Data Material(s) Mass (g) Beaker Baking Soda 33. 25 3215 31. 79 31.79 Calculations 1. From the background, what are the three possible reactions you could have witnessed in this experiment? – 1,90…
    • How much energy would it take to melt 1 aluminum soda can if the can starts out at 20°C, melts at 660°C, and has a mass of 14 g? (4 points) B. For the following questions, use the reaction SO 3 (…
  • Predict the products and balance the following single replacement reactions. If we reaction occurs write N.R. Foper Cyxitian metals use the following charges: Iron: Fe Also write out the libel equa…
  • Types of chemical reactions-Word equations Classify each of the following chemical reactions as synthesis ($). decomposition (D). single replacement (SR), double replacement (DR), or neutralization (N…
  • Classify each of the following reactions as synthesis ($). decomposition (D), single replacement (SR), double replacement (DR). neutralization (N), or combustion (C). Place the correct letter represen…
  • Question 4 (1 point) Listen Which of the following would form an ion that is LARGER than the atom in which it formed? Magnesium Indium Titanium Bromine
    • Two imaging techniques that doctors use are MRI imaging and CT imaging. Use the table of electromagnetic wavelengths to answer the following questions. (8 points) Electromagnetic Wave Category Ap…
  • We are following this video which I time stamped for this specific page I am having trouble with. Can you please help in order. https://www.youtube.com/watch?v=1_5dhbOvkO4 Time Stamp 13:07- 17:00 Â…
  • Draw the structural formula (using C and H) for 3,3-diethylheptane. (4 points)   B. Oil of wintergreen is otherwise known as methyl salicylate . What kind of organic compound is this? Draw the…
  • Freon 12 data ( for question (b) ) Â Â. P 5.6 Evaluating the Effect of Temperature on the Solubility and/or the Activity Coefficient of a Gaseous Compound (Freon 12) in Freshwater and in Seawater Fo…
  • El oxigeno este unido entre dos de los carbonos c. El oxigeno y los tres carbonos formen un compuesto ciclico. 4. La molecularOs tiene los siguientes enlaces entre los N y los O. Co estructura de L…
  • Preguntas de Informe 1. Escriba la estructura de Lewis para las siguientes molecular: a. AsH3 b. NOF c. CSCI2 2. Escriba la estructura de Lewis para los siguientes iones. a. CON- b. CIO4 c. SO42- d. B…
  • Asigne el estado de hibridacion y la geometria a cada elemento enumer siguiente estructura. Dibuje la forma geometrica de cada elemento. H 8 :OH O-B-H 2 |11 9 H-B=N-N-C- -C-CEN: 3 5 10 11 : CI: :N-…
  • Estructura Formula Hibridacion geometrica Forma geometrica C= CH2Cl2 CI = N = NF 3 F = Se = H2Se C= C2N2 N =
    • PBr3 6. Indique el estado de hibridacion de los elementos presentes en las estructu pregunta anterior. a. b. C. d.
  • Determine the empirical formula for each compound. a) ethylene (C2H4) b) ascorbic acid (C6H8O6) 2. What is the empirical formula of a compound that contains 10.52 g Ni, 4.38 g C, and 5.10 g N? 3. N…
  • A student was asked to determine the mass, in grams, of calcium carbonate present in 0.125 g sample of chalk. the student placed The chalk in a 250ml Erlenmeyer flask and added 50 ml of 0.200 mol L hc…
  • . The following acid-base reaction occurs spontaneously in the gas phase at 25.0 C: NH,(9) + HCI(g) = NH CI(s) Calculate the equilibrium constant for this reaction at 306.65 K. Substance AGfo (kJ/mo…
  • QUESTION 7 The number of calories needed to raise the temperature of 32 g of water from 150C to 45c (water specific heat is Ical/g.c) For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Para…
  • . Preview File Edit View Go Tools Window Help 7 Q 2 0 Fri Feb 18 1:09 PM Chemistry 30 Unit B Module 4 Summative Assessment.pdf Page 1 of 2 Q Q 1 Q Search Highlights and Notes Screen Shot :022-01…1…
  • which of the following regions or provinces of Canada has the greatest proportion of soils or bedrock with high buffering capacity? a. alberta b. quebec c. southern ontario d. coastal mountains of BC …
  • explain how calcium carbonate functions as a buffer. Include a chemical reaction in your explanation (4 marks).
  • The world oceans hold most of the carbon in a dissolved form these organisms use the carbon and release oxygen back into the atsmosphere
  • 50 g of unknown mixture containing magnesium was reacted with sodium carbonate and resulted in 2.91 g of magnesium carbonate. What percentage of magnesium was in the mixture?
  • …. Write balanced molecular, complete ionic and net ionic balanced equations for the following acid-base, or gas-forming reactions. Include states of matter. a) mixing aqueous solutions of perchlori…
  • …. Understanding the difference between molecular, total ionic and net ionic equations for a given chemical reaction. Aqueous solutions of strontium perchlorate and potassium sulfate are mixed toget…
  • I’m not sure how to make this plot, please give me some hints.. In this homework, you will be exploring the liquid-vapor equilibrium for a mixture of acetophenone (ACE) and 2-phenylethanol (2PE). Vari…
  • … Show work. Calcium chloride is a common "electrolyte" found in sports drinks. It is highly soluble in water. A concentrated solution of calcium chloride is prepared by dissolving 80.0 gr…
  • … Show work. Glucose (CH1206, M= 180.16 g/mol) is a simple sugar and a polar, molecular compound. Blood sugar (glucose) levels are considered normal when the concentration of glucose in the blood…
  • The order of bases on the template strand of DNA a gene is 3′ AATACCTTGCAA 5′. This segment of DNA is from the beginning of a gene. (5 pts)  What is the sequence of nucleotides in the other (compl…
  • Please could you help me with finding the relative atomic mass for this and the other question? Thank you very much.. Iron 54Fe 5.8% 26 29Fe 91.8% 2.1% 0 20%
  • For the reaction C + 2H2 -> CH4, how many grams of hydrogen are required to produce 17.4 moles of methane, CH4?
  • 2 NH3 + 3 Cu0 – 3 Cu + N2 + 3 H20 In the above equation, how many grams of N2 can be made when 6.1 moles of CuO are consumed?
  • S + 6 HNO3 – H2SO4 + 6 NO2 + 2 H,O In the above equation, how many grams of water can be made when 12.6 moles of HNO, are consumed?
  • 2 NH3 + 3 Cu0 – 3 Cu + N2 + 3 H20 In the above equation, how many grams of N2 can be made when 6.4 moles of CuO are consumed?
  • For the reaction C + 2H2 -> CH4, how many grams of hydrogen are required to produce 8.8 moles of methane, CH4 ?
  • 3 Cu + 8HNO3 > 3 Cu(NO3)2 + 2 NO + 4 H20 In the above equation, how many grams of water can be made when 12.4 moles of HNO3 are consumed?
  • general chem hw step by step Â. 4) Suppose you have a 100.0 mL graduated cylinder containing 50.0 mL of water. If you drop a 154 g piece of brass (d = 8.56 g/ cm3) into the water, how high does t…
  • CHM 251 Lab: Distillation 1) Please label the parts of the distillation apparatus: A (a) ( 9) (c) (e) ( f ) 2) Is this apparatus used for simple or fractional distillation? Please explain. B E Water o…
  • General chem hw step by step Â. Practice with Density Calculations 1) Etylene glycol, C2HoO2, is an ingredient of automobile antifreeze. Its density is 1.11 g/cm3 at 20 C. If you need exactly 500…
  • Answer all questions completely and IN YOUR OWN WORDS:. e) What is the relative standard deviation of the molarities? Show all steps in the calculation. 7. Is the data within the precision standard? 8…
  • 2 NH3 + 3 Cu0 – 3 Cu + N2 + 3 H2O In the above equation, how many grams of N2 can be made when 4.3 moles of Cuo are consumed?
  • Please could you help me with finding the relative atomic mass for this and the other question? Thank you very much.. Krypton 3 6kr 0.4% 36Kr 2.3% 36- 11.6% 83 Kr 11.5% 8+K 57.0% 17.3%
  • Please could you help me with finding the relative atomic mass for this and the other question? Thank you very much.. Copper 69.2% BCu 30.8%
  • Please could you help me with finding the relative atomic mass for this and the other question? Thank you very much.. Magnesium Mg 79.0% 25Mg 10.0% Mg 11.0%
  • Please could you help me with finding the relative atomic mass for this and the other question? Thank you very much.. Chlorine 1′ ECI 75.8% A, = [ (35 x 75.8) + (37 x 24.2) ] = 3548.4 = 35.5 (3…
  • For the reaction C + 2H2 -> CH4, how many grams of hydrogen are required to produce 7.9 moles of methane, CHA ?
  • A student performed the Avogadro’s Number experiment and collected the following data: Concentration of Steric acid solution: 1.2 x 10 -4Â g/mL Pipet calibrated as 30 drops/mL Diameter of the Petri D…
  • General chem hw need help w these two pages w steps  Â. 9. (6.25 x 102)3 10. (2.35 x 10-3) 1/3 11. (5.46 x 10-2) (16.0 x 104) (7.779/55.85) = 12. [ (1.7 x 106) / (2.63 x 105) ] + 7.33 Practice …
  • Additional Data Points To fill in the last column, multiply the number of spoonfuls by the number of grams in one spoonful. For example, if your spoon holds approximately 10 grams of sugar, multiply t…
  • Additional Data Points * To fill in the last column, multiply the number of spoonfuls by the number of grams in one spoonful. For example, if your spoon holds approximately 10 grams of sugar, multiply…
  • S + 6 HNO3 – H2SO4 + 6 NO2 + 2HO In the above equation, how many grams of water can be made when 2.7 moles of HNO3 are consumed?
  • 3 Cu + SHNO3 -›3 Cu(NO3)2 + 2 NO + 4 H20 In the above equation, how many grams of water can be made when 19.6 moles of HNO3 are consumed?
  • Use the identities of the following amino acids to answer Questions 1 to 3: Histidine (His)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂPhenylal…
  • Explain how calcium carbonate functions as a buffer. Include a chemical reaction in your explanation. (4 marks)
  • Samples of simulated lake water were exposed to SO 2 (g). Two graduated cylinders containing samples of simulated lake water had CaCO 3 (s) added. Describe the effect of the added CaCo 3 (s).
  • . requires Respondus LockDown Browser + Webcam it: 0:20:00 Time Left:0:19:45 Salsabeel Aljaouni: Attempt 1 Question 2 (5 points) 3 An aqueous solution at 25.0C contains [H+] = 0.085 M. What is the p…

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FAQs

How do you answer chemistry questions? ›

Get to the exam early enough that you have time to get organized and relax.
  1. Write Down What You Know. Don't risk drawing a blank when confronted with a calculation! ...
  2. Read the Instructions. Read the instructions for the test! ...
  3. Preview the Test. ...
  4. Read Each Question Completely. ...
  5. Answer Questions You Know. ...
  6. Show Your Work.
11 Jul 2019

What is the most important question in chemistry? ›

The most important question in chemistry is "Where are the electrons?" electronegative atoms (e.g. F, Cl, O, N) of a molecule. The electronegative atoms pull electron density away from the less electronegative atoms (e.g. C, H) to which they are bonded.

What are the 7 types of chemistry? ›

Areas of Chemistry
  • Analytical Chemistry.
  • Biological/Biochemistry.
  • Chemical Engineering.
  • Inorganic Chemistry.
  • Organic Chemistry.
  • Physical Chemistry.

What is an acid in chemistry? ›

What is an acid, as defined in chemistry? An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions (acid catalysis).

How many elements are there? ›

Since then, the periodic table has evolved to reflect over 150 years of scientific development and understanding in chemistry and physics. Today, with 118 known elements, it is widely regarded as one of the most significant achievements in science.

Why is chemistry so hard? ›

The primary reason chemistry is so hard is because of the topic progression. You really have to fully understand several topics before you can fully understand other topics. It's important to keep in mind, memorization isn't the key here. There's a certain element of memorization.

How do I pass chemistry? ›

Be Smart on Tests
  1. Don't cram for a test. Don't put yourself in a position where you have to stay up all night studying. ...
  2. Get sleep before a test. Eat breakfast. ...
  3. Read through the test before answering any questions. ...
  4. Be sure to answer the high-point questions. ...
  5. Review returned tests.
19 Jan 2019

What is the hardest question in chemistry? ›

Answer: which has more calories : table sugar or aspartame ? what does synthetic gas (water gas) consist of ?

What are the 3 types of acids? ›

Usually acids can be divided into three major types. First one is binary acid, second one is oxyacid, and the last one is carboxylic acid. Binary acids are all written in “H-A” form, which means hydrogen bond to a nonmetal atom.

What are the 5 types of chemistry? ›

Traditionally, chemistry has been broken into five main subdisciplines: Organic, Analytical, Physical, Inorganic and Biochemistry.

Is Class 11 chemistry hard? ›

Besides Ionic, Electrochemistry and Thermodynamics are also considered tough. On the contrary, Organic Chemistry which is one of the most tough topics of Class 12, is comparatively easy in Class 11 and deals with basic topics like IUPAC, Hydrocarbons and Reaction Mechanism.

What are the 2 types of chemistry? ›

In a more formal sense, chemistry is traditionally divided into five major subdisciplines: organic chemistry, biochemistry, inorganic chemistry, analytical chemistry, and physical chemistry.

What are the two types of chemicals? ›

The substances mentioned above exemplify the two basic types of chemical compounds: molecular (covalent) and ionic.

What does pH stand for? ›

pH, explained

The abbreviation pH stands for potential hydrogen, and it tells us how much hydrogen is in liquids—and how active the hydrogen ion is.

What is pH a measure of? ›

Detailed Description. pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

Which one is a strong acid? ›

Strong acids consist of seven main acids – chloric acid, hydrobromic acid, hydrochloric acid, hydroiodic acid, nitric acid, perchloric acid, and sulfuric acid. These can completely dissociate in water, giving them the title of strong acid.

Which is a pure element? ›

A pure element is one which constitutes of similar kind of atoms. Thus, sodium is a pure element having only sodium atoms. While glass and cement are made up of different kinds of atoms. ​

What is the symbol of 118 element? ›

Oganesson is a synthetic chemical element with the symbol Og and atomic number 118.

Is water an element? ›

Water is a compound because it is made up of water molecules. There is no such thing as water atoms. Water molecules are made of hydrogen and oxygen atoms, in the definite proportion of two hydrogens for one oxygen.

Is chemistry or biology harder? ›

Chemistry is more difficult than Biology because it requires critical thinking to solve complex problems. Chemistry is also more difficult than Biology because it requires more math and calculations to explain solutions to problems. Up Next Biomedicine Achievements.

Is chemistry easier than physics? ›

Physics is considered comparatively harder than chemistry and various other disciplines such as psychology, geology, biology, astronomy, computer science, and biochemistry. It is deemed difficult compared to other fields because the variety of abstract concepts and the level of maths in physics is incomparable.

How can I study smart? ›

Studying 101: Study Smarter Not Harder
  1. Reading is not studying. Simply reading and re-reading texts or notes is not actively engaging in the material. ...
  2. Understand the Study Cycle. ...
  3. Spacing out is good. ...
  4. It's good to be intense. ...
  5. Silence isn't golden. ...
  6. Problems are your friend. ...
  7. Reconsider multitasking. ...
  8. Switch up your setting.

What should I do if I fail in chemistry? ›

Steps to Take
  1. Talk to Your Instructor. This should be the very first thing you do because nearly all of the options for minimizing the damage involve your teacher. ...
  2. Keep Doing Your Homework. ...
  3. Keep Attending Lectures and Labs. ...
  4. Take Notes. ...
  5. Get Someone Else's Notes. ...
  6. Try a Different Text. ...
  7. Work Problems.
12 Sept 2019

How do I study if I hate chemistry? ›

Maybe start with merely 30 minutes every day, and then work your way up. Remember, reading every day is important, the crucial words being 'reading' and 'every day'. It doesn't matter if your portions are small. Just keep reading.

What is the old name of chemistry? ›

The word chemistry derives from the word alchemy, which is found in various forms in European languages. Alchemy derives from the Arabic word kimiya (كيمياء) or al-kīmiyāʾ (الكيمياء).

What is the biggest question of life? ›

The biggest question for most must be, “What is the purpose of life?” A fundamental purpose of earth life is personal growth and attainment.

What is a good scientific question? ›

A good scientific question should be objective and testable. It may be a verification question, theory question, or experimental question. A scientific question should be narrow enough to answer with data gathered by observation or testing. It should not be a question about opinion.

What is the hardest question in chemistry? ›

Answer: which has more calories : table sugar or aspartame ? what does synthetic gas (water gas) consist of ?

What are topics in chemistry? ›

General chemistry is the study of matter, energy, and the interactions between the two. The main topics in chemistry include acids and bases, atomic structure, the periodic table, chemical bonds, and chemical reactions.

How do I prepare for a chemistry interview? ›

Make sure your suit fits you properly.
...
Follow these tips to ensure you look and act presentable during your chemistry job interview:
  1. Research the company you're interviewing with.
  2. Smile and use positive body language.
  3. Send a follow-up thank you note addressed to your interviewer(s).
18 Jul 2017

What are the hardest topics in chemistry? ›

That said, here are a few example concepts that A-level chemistry students may find particularly challenging.
  1. Equilibrium. ...
  2. Le Chatelier's Principle. ...
  3. Redox and electrochemistry. ...
  4. pH. ...
  5. NMR spectroscopy. ...
  6. Optical isomerism/chirality.

What is the old name of chemistry? ›

The word chemistry derives from the word alchemy, which is found in various forms in European languages. Alchemy derives from the Arabic word kimiya (كيمياء) or al-kīmiyāʾ (الكيمياء).

What is the biggest question of life? ›

The biggest question for most must be, “What is the purpose of life?” A fundamental purpose of earth life is personal growth and attainment.

What is a good scientific question? ›

A good scientific question should be objective and testable. It may be a verification question, theory question, or experimental question. A scientific question should be narrow enough to answer with data gathered by observation or testing. It should not be a question about opinion.

What are the 4 types of chemistry? ›

Traditionally, chemistry has been broken into five main subdisciplines: Organic, Analytical, Physical, Inorganic and Biochemistry.

What are uses of chemistry? ›

Chemistry is essential for meeting our basic needs of food, clothing, shelter, health, energy, and clean air, water, and soil. Chemical technologies enrich our quality of life in numerous ways by providing new solutions to problems in health, materials, and energy usage.

What are acid bases and salts? ›

Acid:- An acid is defined as a substance whose water solution tastes sour, turns blue litmus red, and neutralizes bases. Base:- A substance is called base if its aqueous solution tastes bitter, turns red litmus blue, or neutralizes acids. Salt:- Salt is a neutral substance whose aqueous solution does not affect litmus.

Who is the father of chemistry and why? ›

He invented the contemporary naming system for chemical compounds. Therefore, Lavoisier is known as the "Father of Modern Chemistry" because of his significant impact on the history of chemistry.

What questions do they ask during interview? ›

50+ most common job interview questions
  • Tell me about yourself.
  • Walk me through your resume.
  • How did you hear about this position?
  • Why do you want to work at this company?
  • Why do you want this job?
  • Why should we hire you?
  • What can you bring to the company?
  • What are your greatest strengths?
2 Sept 2022

What compound is inorganic? ›

An inorganic compound is a substance that does not contain both carbon and hydrogen. A great many inorganic compounds do contain hydrogen atoms, such as water (H2O) and the hydrochloric acid (HCl) produced by your stomach. In contrast, only a handful of inorganic compounds contain carbon atoms.

Is chemistry easy or hard? ›

Chemistry is considered very hard. In fact, Chemistry is considered one of the most difficult subjects in College. Some of the more advanced chemistry courses (like Physical Chemistry) have been determined to be the hardest classes in College.

What is the easiest topic in chemistry? ›

As far ''Easiest topics" in chemistry is concerned, Polymers & Biomolecules, S&P block elements, Hydrocarbons, Physical Chemistry chapters are very scoring topics.

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