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If edge length of an unit cell =4xx10^(-...

If edge length of an unit cell `=4xx10^(-8)` cm and the unit cell is a face-centered cubic with atomic mass of metal is 40 then density of the unit cell will be `[N_(2)=6xx10^(23)]`

A

`(100)/(24)` gm/ml

B

`(25)/(24)` gm/ml

C

`(50)/(24) `gm/ml

D

`(1)/(4)` gm/litre

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The correct Answer is:
A
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