The experimental rate law for the decomposition of nitrous oxide (N2O) to N2 and O2 is Rate = k[N2O]^2 . Two mechanisms are proposed: Mechanism I….

The experimental rate law for the decomposition of nitrous oxide (N2O) to N2 and O2 is Rate = k[N2O]^2 .

Two mechanisms are proposed:

Mechanism I.

N2O → N2 + O

N2O + O → N2 + O2

Mechanism II.

2N2O → N4O2

N4O2 → 2N2 + O2

Which of the following would be the correct mechanism?

A. Mechanism I with the second step as the rate-determining step

B. Mechanism II with the second step as the rate-determining step

C. Mechanism I with the first step as the rate-determining step

D. Two of these could be correct.

E. None of these could be correct.

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