22. For the first order reaction below, the initial concentration of - ProProfs Discuss
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22. For the first-order reaction below, the initial concentration of A is 0.80 M. What is the half-life of the reaction if the concentration of A decreases to 0.10 M in 54 seconds? A → B rate = k[



A. 18 s
B. 24 s
C. 36 s
D. 48 s
E. 51 s

This question is part of CHEM 2425
Asked by Ochiengj, Last updated: Dec 18, 2019

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ochiengj

Ochiengj

Answered Feb 20, 2018

18 s

Solving: ln[A]0/[A] = kt ln0.80/0.10 = 54 k k = 2.079/54 =0.0385 t1/2 =0.693/0.0385 = 18 s
 

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