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Potassium crystallises in a body centred...

Potassium crystallises in a body centred cubic unit cell. The mass of one unit cell is

A

`1.29xx10^(-23)gm`

B

`1.295xx10^(-22)gm`

C

`6.2xx10^(-23)gm`

D

`1.29xx10^(-24)gm`

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The correct Answer is:
2
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