The energy absorbed by each molecule `(A_2)` of a substance is `4.4 xx 10^-19 J` and bond energy per molecule is `4.0 xx 10^-19 J`. The kinetic energy of the molecule per atom will be.

Options

A. `2.0xx10^(-20)` J
B. `2.2xx10^(-19)` J
C. `2.0xx10^(-19)` J
D. `4.0xx10^(-20)` J

Answer

A

Explanation

K.E. per atom =`((4.4xx10^(-19))-(4.0xx10^(-19)))/2`
`=(0.4xx10^(-19))/2=2.0xx10^(-20)`