# Question #a5353

##### 1 Answer

Dec 6, 2015

#### Explanation:

(a)

This is a 1st order reaction so:

We can integrate this rate law (I won't go into the maths here) to give:

Taking natural logs of both sides

Now we put in the values:

(note we must convert "min" to "s" so x t by 60)

(b)

To get the 1/2 life we use:

Again, I won't go into the derivation of this.