# Problem: The initial rate of a reaction which is first order in A is 1.0 × 10  −6 M/s when the initial concentration is 0.0040 M. What is the first order rate constant (s−1)? A. 4.0 × 10 -9 B. 1.0 × 10 -9 C. 2.5 × 10 -3 D. 1.0 × 10 -4 E. 2.5 × 10 -4

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The initial rate of a reaction which is first order in A is 1.0 × 10  −6 M/s when the initial concentration is 0.0040 M. What is the first order rate constant (s−1)?

A. 4.0 × 10 -9

B. 1.0 × 10 -9

C. 2.5 × 10 -3

D. 1.0 × 10 -4

E. 2.5 × 10 -4

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