3.31 A first-order reaction that results in the destruc- tion of a pollutant has a rate constant of 0.1/day. (a) How many days will it take for 90 percent of the

chem- ical to be destroyed? (b) How long will it take for 99 per- cent of the chemical to be destroyed? (c) How long will it take for 99.9 percent of the chemical to be destroyed?