The half-life of a pesticide determines its persistence in the environment

Question

The half-life of a pesticide determines its persistence in the environment. A common pesticide degrades in a first-order process with a rate constant of 6.9 1/hours. What is the half-life in hours of the breakdown reaction? Enter to 4 decimal places.

Answer 1

t_1/2 for first order = 0.693/k = 0.693/6.91 = 0.1003 hr^-1