Integrated Rate Laws & Half-Life

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1.
A first-order reaction has k = 2.303 x 10^-3 s^-1. The time for 90% completion is:
2.
A zero-order reaction has k = 0.02 M/s and [A]_0 = 1 M. When is [A] = 0?
3.
The fraction remaining after 4 half-lives of a first-order reaction is:
4.
For a second-order reaction with [A]_0 = 0.4 M and k = 0.5 M^-1 min^-1, the half-life is:
5.
For a first-order reaction, 50% is complete in 10 min. Time for 75% completion is:

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