Question

If [A]₀ is the initial concentration of a reactant taking part in a first order reaction, how much of the reactant will be left after n half-lives?

Answer 1

If a reactant follows first-order kinetics and its initial concentration is [A]₀, then after n half-lives, the amount of reactant left is given by the formula:

`[A] = [A]_0 xx (1/2)^n`