Question

Part A

The rate constant for a certain reaction is k = 6.30×10−3 s−1 . If the initial reactant concentration was 0.150 M, what will the concentration be after 9.00 minutes? Express your answer with the appropriate units.

Part B

A zero-order reaction has a constant rate of 4.90×10−4 M/s. If after 60.0 seconds the concentration has dropped to 2.50×10−2 M, what was the initial concentration? Express your answer with the appropriate units.

Answer 1

For the 1st question it is based on the concept of first order reaction equation and for the 2nd question we used the concept of zero order equation to find the value.