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At 27^@C the average thermal energy of H...

At `27^@C` the average thermal energy of He atom is `[K = 1.38 xx 10^-23 J]`

A

`2.51xx10^21J`

B

`6.21xx10^-21J`

C

`6.21xx10^-2J`

D

`6.21xx10^-23J`

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