The half-life of a first order reaction is determined to be 79.0 years. How long will it take for the concentration of the reactant to reach 2% of its initial value?

Answer 1

.02 = (1/2)^(t/79)
t = 445.865 years

Answer 2

This is a question from the second midterm of 3.091x by edx. Stop cheating, it's silly and pointless.

Answer 3

482.5