Question

Question #31e24

Answer 1

`0.1"M"`

Explanation:

If `t_(1/2)=5"min"` then after `15"min"` 3 half - lives have elapsed (15/5 = 3).

So after 1 half - life the concentration will fall to 0.4M

After 2 half - lives the concentration will fall to 0.2M

After 3 half - lives the concentration will fall to 0.1M

Here is a video that explains the integrated rate law (Zero, First and Second order) and their half-lives. First order starts at minute 3:47.