# Question #f0861

##### 1 Answer

Jan 16, 2017

The rate constant

#### Explanation:

We are given that the reaction is a first order reaction, meaning that it can be expressed through the first order reaction integrated rate law:

Let us assume a sample size of 1 M. Therefore,

40%, or .4 of the sample remains after 45 minutes. Therefore,

.4 =

While we are given minutes, I prefer to use seconds for rate law calculations.

Now, we can plug in the numbers to get this equation:

Solving for