A Compound Hydrolyzes in Water with a Rate Constant Of 1.9

Multiple Choice

A compound hydrolyzes in water with a rate constant of $1.9 \times 10 ^ { - 3 } \mathrm {~min} ^ { - 1 }$ at pH 6.0 and $26 ^? \mathrm { C }$ . If a freshly prepared solution of the compound has a concentration of 0.086M, what is the percent completion of the reaction after 3 half-lives?

A) 63%
B) 87%
C) 94%
D) 79%
E) 56%