6. Which one of the following is not a redox reaction? a. 2H2(g) O2(g) 2H20 b. Z

Question

6. Which one of the following is not a redox reaction? a. 2H2(g) O2(g) 2H20 b. Zn(s) H2SO4(aq) ZnSOe(aq) H2(g) 7. Based on the balanced chemical equation shown below, what volume of 0.250 MK2Szoalaa), is needed to completely react with 24.88 mL of 0.125 M Kio(aq), according to the chemical equation: a. 6.22 mL b, 12.4 mL c. 24.90 mL d. 99.5 mL 8. What is the pressure in a 7.50-L flask if 0.15 mol of carbon dioxide gas is added to0.33 mol of oxygen? The temperature of the mixture is 48.0 C. a. 0.252 atm b, 0.592 atm c, 1.69 atm d. 3.96 atm 9. A sample of an ideal gas has its volume doubled while its temperature remains constant. If the original pressure was 100 torr, what is the new pressure? a. 10 torr b. 50 torr c. 100 torr d. 200 torr 10. What volume of NO is formed at STP from 8.44 moles of NO2 if there is plenty of water present? 3 NO2 (g) H2O(l) 2 HNOs(aq) NO(g) a. 63.1 L b. 66.5 L c. 68.1 L d. 187 L

Explanation / Answer

Post one more question to get the remaining two answers, i have solved the first three problems

6) The correct answer is Option C

Since the oxidation number of none of the molecule is changed in the reaction

Hydrogen remains in +1 oxidation state

Nitrogen remains in -3 oxidation state and Oxygen remains in -2 oxidation state

Hence this is not a redox reaction

7)

2 moles of K2S2O3 requires 1 mole of KI3

Moles of KI3 = 24.88/1000 * 0.125M

Moles of K2S2O3 = 2 * 24.88/1000 * 0.125M

Volume of K2S2O3 required = V/1000 * 0.250 = 2 * 24.88/1000 * 0.125M

V = 24.88 mL

Hence the correct answer is Option C

8) Using ideal gas equation

PV = nRT

P*7.50 = (0.15+0.33) * 0.0821 * (273+48)

P = 1.686 atm

Hence the correct answer is Option C

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