Convert -40. kcal/mol to kJ/mol using the fact that 1kcal = 4.184 kJ. Show work using dimensional analysis. O a. 40, kcal mol 1 kcal 4.184 kJ kJ = -9.6 mol -40, kcal , 4.184 kJ mol O b. kJ -170 1 kcal mol Once we know the value of AHrxn it is possible to solve many other types of problems. For example, how many moles of zinc should we react with 6HCI to generate 120 kJ of heat? O a. 120 kJ 1 mol = 0.71 mol -170 kJ O b. 120 kJ -170 kJ = 20,000 mol 1 mol How many grams of zinc react with excess 6M HCI if 500. kJ of heat are released? Use dimensional analysis, the AHxn and the atomic mass of zinc. O a. 500. kJ 1 mol 65.39 g = 190 g Zn -170 kJ 1 mol O b. 500. kJ 1 mol 1 mol

Convert -40. kcal/mol to kJ/mol using the fact that 1kcal = 4.184 kJ. Show work using dimensional analysis. O a. 40, kcal mol 1 kcal 4.184 kJ kJ = -9.6 mol -40, kcal , 4.184 kJ mol O b. kJ -170 1 kcal mol Once we know the value of AHrxn it is possible to solve many other types of problems. For example, how many moles of zinc should we react with 6HCI to generate 120 kJ of heat? O a. 120 kJ 1 mol = 0.71 mol -170 kJ O b. 120 kJ -170 kJ = 20,000 mol 1 mol How many grams of zinc react with excess 6M HCI if 500. kJ of heat are released? Use dimensional analysis, the AHxn and the atomic mass of zinc. O a. 500. kJ 1 mol 65.39 g = 190 g Zn -170 kJ 1 mol O b. 500. kJ 1 mol 1 mol

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Consider these reactions: AH = -184.6 kJ Reaction 1: H₂(g) + Cl₂ (g) → 2HCl(g) Reaction 2:20F2 (g) O2(g) +2 F2 (g) AH = -49.4 kJ Reaction 3: N₂(g) + 2O2(g) → 2NO2(g) AH = +66.4 kJ Use Reaction 1. Determine the mass, in grams, of chlorine gas consumed (with excess H₂) when 1,891.0 kJ of energy is released from the system. Answer: g (mass must be positive; round to nearest whole number)
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