chemistry

According to the mechanism below, what is the correct expression for the rate consumption of A?
In the mechanism, M is a molecule that collides with A and A* is a highly-energized for of A.

Step 1: A+M <--> A*+M : rate constants k1 and k-1

Step 2: A* <--> C : rate constants k2, and k-2

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asked by Jin

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