At 25°C the Rate Constant for the First-Order Decomposition of a Pesticide

Multiple Choice

At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 × 10^-3 min^-1. If the starting concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25°C?

A) 1.14 × 10^{-1 M}
B) 47.4 M
C) 1.25 ×10^{-2 M}
D) 2.11 × 10^-2 M
E) 2.68 × 10^-2 M