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A crystalline solid of a pure substance ...

A crystalline solid of a pure substance has a face-centred cubic structure with a cell edge of 400 pm. If the density of the substance in the crystal is `8 g cm^(-3)`, then the number of atoms present in 256g of the crystal is `N xx 10^(24)`. The value of `N` is

A

4

B

2

C

3

D

5

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The correct Answer is:
B
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