2NO2(g)+F2(g)→NO2F(g)ΔH∘rxn=−284kJ/mol rxn NO2(g) and F2(g) can react to produce NO2F(g), as represented above. A proposed mechanism for the reaction has two elementary steps, as shown below. Step 1: NO2+F2→NO2F+F (slow)       Step 2: NO2+F→NO2F (fast) (a) Write a rate law for the overall reaction that is consistent with the proposed mechanism.

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