For a reaction a A → products, [A] 0 = 4.0 M, and the first three successive half-lives are 48, 96, and 192 min.
-Calculate k (without units).

Name: For a reaction a A → products, [A] 0 = 4.0 M, and the first three successive half-lives are 48, 96, and 192 min. -Calculate k (without units).
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Question

Quizplus · Accepted Answer

The correct answer is A because the half-life of a first-order reaction is given by t1/2 = ln2/k, so k = ln2/t1/2. The first half-life is 48 min, so k = ln2/48 = 5.2 × 10-3 min-1.

For a Reaction a A → Products, [A]0 = 4

For a Reaction a A → Products, [A]₀ = 4