Question

What is the average rate of the reaction from 20-40 seconds?

Answer 1

STEP - BY - STEP EXPLANATION

What to find?

Average rate of the reaction from 20-40 seconds.

Given:

The average rate of the reaction from 20-40 seconds can be calculated following the steps below:

Step 1

State the formula.

`average\text{ rate of change}=\frac{change\text{ in concentration}}{change\text{ in time}}`

`=(f(b)-f(a))/(b-a)`

From the graph given:

If a =20, f(a) =0.14

If b =40 , f(b) = 0.11

Step 2

Substitute the values into the formula.

`=(0.11-0.14)/(40-20)`

Step 3

Simplify

`=(-0.03)/(20)`
`=-0.0015`

ANSWER

The average rate of change is -0.0015 M/L/sec.