For a reaction `Rto P`, the concentration of a reactant changes from 0.03 M to 0.02M in 25 minutes. Calculate the average rate of the reaction using the units of seconds.

Options

A. `6.66xx10^(-5)`
B. `6.6xx10^-6`
C. `5.67xx10^(-5)`
D. `7.26xx10^(-6)`

Answer

B

Explanation

For the reaction, `RrarrP`
Average rate of reaction
`=("change in concentration of reactant/product")/("time taken")`
`=(Delta[R])/(Deltat)=-[(R_(2)]-[R_1)]/(t_(2)-t_(1))`
`((0.02-0.03)M)/((25xx60)s)=((-0.01)M)/((1500)s)`
`=6.66xx10^(-6)Ms^(-1)`
`=6.66xx10^(-6)molL^(-1)s^(-1)`