Question

Part A

The rate constant for a certain reaction is k = 1.20×10^−3 s−1 . If the initial reactant concentration was 0.700 M, what will the concentration be after 4.00 minutes?

Express your answer with the appropriate units.

Part B

A zero-order reaction has a constant rate of 1.00×10^−4M/s. If after 40.0 seconds the concentration has dropped to 1.50×10^−2M, what was the initial concentration?

Express your answer with the appropriate units.