Chemistry

Problem

A pesticide degrades by a first-order process with a half-life of

4.0\,\text{min}

. Approximately how much time is required for the pesticide concentration to fall to

15\%

of its initial value? a)

8.0\,\text{min}

11\,\text{min}

4.6\,\text{min}

26\,\text{min}