The rate constant for a first-order reaction is 6.47 x 10 -7 hr -1. How long would it take for the reaction to be 28.75% complete?
A. 2.28 x 105 hours
B. 8.37 x 105 hours
C. 6.09 x 105 hours
D. 5.24 x 105 hours
E. 1.93 x 105 hours
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