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The energy absorbed by each molecule (A(...

The energy absorbed by each molecule `(A_(2))` of a substance is `4.4xx10^(-19)J` and bond energy per molecule is `4.0xx10^(-19)J`. The kinetic energy of the molecule per atom will be

A

`4.0 xx 10^(-20)` J

B

`2.0 xx 10^(-10)J`

C

`2.2 xx 10^(-19)` J

D

`4 xx 10^(-19)` J

Text Solution

Verified by Experts

The correct Answer is:
B
`KE=4.4xx10^(-19)-4.0xx10^(-19)`
KE/ molecule `=0.4xx10^(19)`
`KE//"atom"=(0.4xx10^(19))/(2)`
`=2xx10^(-20)J`
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