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The mechanism for the gas-phase reaction 2NO + Cl2 → 2NOCl is suggested to be: (1)...

The mechanism for the gas-phase reaction
2NO + Cl2 → 2NOCl
is suggested to be:
(1) NO + NO → N2O4 (slow)
(2) N2O4 + Cl2 → 2NOCl (fast)
Based on this mechanism, the rate law for the overall reaction is:

Select one:

a. Rate = k [NO]

b. Rate = k [NO]2

c. Rate = k [NO2]2[Cl2]

d. Rate = k [Cl2]

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