题目
题目

CHM-1020-LD01.2025SU PS 1-Part I (Kinetics)

单项选择题

The rate constant for a zero-order reaction is 0.54 M/s. What is the half-life of this reaction if the initial concentration is 0.49 M?

选项
A.0.45 s
B.2.6 s
C.0.90 s
D.0.11 s
E.1.1 s
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标准答案
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思路分析
The problem asks for the half-life of a zero-order reaction given k = 0.54 M/s and [A]0 = 0.49 M. For a zero-order process, the half-life is t1/2 = [A]0 / (2k). Option 1: 0.45 s. If we compute t1/2 = 0.49 / (2 × 0.54) = 0.49 / 1.08 ≈ 0.4537 s, which rounds to 0.45 s. This value closely matches the calculated result, ......Login to view full explanation

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