Question 1
The decomposition of N
2O
5 in solution in carbon tetrachloride proceeds via the reaction
2N
2O
5(
soln) → 4NO
2(
soln) + O
2(
soln)
The reaction is first order and has a rate constant of 4.82 × 10
-3 s
-1 at 64 °C. If the reaction is initiated with 0.073 mol in a 1.00 L vessel, how many moles remain after 151 s?
◦ 15 mol
◦ 0.077 mol
◦ 0.038 mol
◦ 0.053 mol
◦ 0.035 mol
Question 2
SO
2Cl
2 decomposes in the gas phase by the reaction
SO
2Cl
2(
g) → SO
2(
g) + Cl
2(
g)
The reaction is first order in SO
2Cl
2 and the rate constant is 3.0 × 10
-6 s
-1at 600 K. A vessel is charged with 6.4 atm of

at 600 K. The partial pressure of SO
2Cl
2 at

is ________ atm.
◦ 2.6
◦ 0.064
◦ 3.8
◦ 0.29
◦ 0.41