First and second order reaction question.
A first order reaction has a half-life of 196 seconds at 25oC. How long (in minutes) does it take for the concentration of the reactant to drop to 3.125% of the original concentration?
A second order reaction with a single reactant has a rate constant of 3.75×10-3 M-1s-1. After 500.0 seconds the concentration has dropped to 0.104 M. What was the initial concentration?