1. CHM114 Final Review

2. Calculate standard cell potential of 2Cr(s) + 3Fe2+ (aq) -> 3Fe(s) + 2Cr3+ (aq) Given standard half cell potential for Cr/Cr3+ is -0.74V and standard half cell potential for Fe/Fe2+ is -0.44V.

3. An unknown element has two naturally occurring isotopes. Calculate the average atomic mass in amu.

4. Calculate the moles of carbon dioxide in 52.06 grams carbon dioxide.

5. Calculate the concentrations of Na+ and SO42- when dissolving 0.500 mol Na2SO4 in 1.33 L water.

6. Calculate the amount in grams of NO2 produced by the combustion of 43.9 grams of ammonia. 4NH3(g) + 7O2(g) -> 4NO2(g) + 6H2O(g)

7. Calculate the grams of H3PO4 in 175mL of 3.5M solution of H3PO4.

8. Calculate delta H for the following reaction.

9. Calculate the partial pressure of neon in a container of nitrogen gas, argon, helium and neon. Given the partial pressure of N2 is 44.0 torr, Ar is 486 torr, He is 218 torr, and the total pressure is 987 torr.

10. Determine which has the strongest intermolecular forces.

11. Calculate the energy required to convert 50.0g ice at 0 degrees C to liquid water at 22.0 degrees C. Given the heat of fusion of water is 6.01kJ/mol, the heat capacity of liquid water is 75.3 J/(molK)

12. Calculate the freezing point of 0.055 m aqueous NaNO3. Given the molal freezing point depression of water is 1.86 degrees C/m.

13. Calculate the average rate of disappearance of A between 10s and 20s in mol/s. Assume reaction proceeds A(g) -> B(g)

14. Calculate the rate law for the reaction 2A + 3B -> products Given A is first order and B is second order.

15. Calculate the time (minutes) it takes for a concentration to decrease from 0.13M to 0.088M. Given the reaction is first order and the rate constant is 0.33 min-1

16. Calculate the minimum temperature for the reaction to be spontaneous under standard conditions. C(s) + H2O(g) -> CO(g) + H2(g) Given the standard delta H = 131.3 kJ/mol and the standard delta S = 133.6 J/(Kmol) at 298K.

18. According to kinetic-molecular theory, if the temperature of a gas is raised from 100 °C to 200 °C, the average kinetic energy of the gas will __________.