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A metallic element exists as a cubic lat...

A metallic element exists as a cubic lattice. Each edge of the unit cell is 2.88 Å and the density of the metal is `7.2gcm^(-3)`. The number of unit cells in 100 g of the metal is

A

`5.82xx10^(23)`

B

`6.023xx10^(23)`

C

`8.52xx10^(23)`

D

none of these

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The correct Answer is:
A
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