The gas phase decomposition of dinitrogen pentoxide at 335 K:
N2O5(g) → 2 NO2(g) + ½ O2(g)
is first order in N2O5 with a rate constant of 4.70×10-3 s-1.
If an experiment is performed in which the initial concentration of N2O5 is 8.15×10-2 M, what is the concentration of N2O5 after 364.0 s have passed?
A. 3.81×10-2 M
B. 6.37×10-2 M
C. 3.07×10-2 M
D. 1.47×10-2 M