The rate constant of a first-order process that has a half-life of 225 s is __________ s^-1.

Name: The rate constant of a first-order process that has a half-life of 225 s is __________ s -1 .
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Question

Quizplus · Accepted Answer

The half-life of a first-order process is given by: 
t1/2 = ln2/k
where k is the rate constant. 
Rearranging the equation, we get:
k = ln2/t1/2
Substituting the given value of t1/2 = 225 s, we get:
k = ln2/225 = 0.00308 s-1
Therefore, the rate constant is 3.08 × 10-3 s-1, which corresponds to answer choice B.

The Rate Constant of a First-Order Process That Has a Half-Life