The rate of the reaction in terms of the disappearance of re

The rate of the reaction in terms of the \"disappearance of reactant\" includes the change in the concentration of the reactant, the time interval, and the coefficient of the reactant.

Consider the following reaction:

Time ()	0	20	40
	0.0400	0.0240	0.0180

Solution

rate = -(1/2) dA/dt ,

dA/dt = (0.024-0.04)/20-0 =- 0.0008

rate = (- 1/2)(-0.0008)

= 4 x10^ -4