Question

Part A

Half-life equation for first-order reactions: t1/2=0.693k where t1/2 is the half-life in seconds (s), and k is the rate constant in inverse seconds (s−1). Part A What is the half-life of a first-order reaction with a rate constant of 6.60×10−4 s−1? Express your answer with the appropriate units. 105 s

Part B

What is the rate constant of a first-order reaction that takes 167 seconds for the reactant concentration to drop to half of its initial value?

Express your answer with the appropriate units.

Part C

A certain first-order reaction has a rate constant of 2.70×10^−3 s−1. How long will it take for the reactant concentration to drop to 1/8 of its initial value?

Express your answer with the appropriate units.