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The energy absorbed by each molecule (A2...

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.

A

`2.2 xx 10^(-19) J`

B

`2.0 xx 10^(-19) J`

C

`4.0 xx 10^(-20) J`

D

`2.0 xx 10^(-20) J`

Text Solution

Verified by Experts

The correct Answer is:
D
K.E. per atom `= ((4.4 xx 10^(-19)) - (4.0 xx 10^(-19)))/(2)J`
`= (0.4 xx 10^(-19))/(2) J = 2.0 xx 10^(-20) J`
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