3. (a) Consider the first order reaction, A ---->  products , which has a rate constant, k = 2.95 X 10-3 s-1. What percent of A remains after 150 s ? (b) The reaction, A ------> products is second order in A. Initially [A]0 = 1.00 M; and after 25 mins, [A] = 0.25 M. What is the rate constant for this reaction?

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