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Zero and first order integrated rate laws
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ck010
The percentage of a reactant remaining after three half-lives of a first order reaction is
A
12.5%
B
25%
C
33.3%
D
6.25%
Answer: A
After each half-life the amount halves, so the fraction left is
(
1/2
)
3
=
1/8
=
12.5%
.
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