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What is the number of unit cells in 6.4g...

What is the number of unit cells in 6.4g of X (atomic mass = 64) (X crystallises in body centred cubic-lattice)

A

`N_(A)/10`

B

`N_(A)/20`

C

`N_(A)/5`

D

`2N_(A)`

Text Solution

Verified by Experts

The correct Answer is:
B
Number of atoms in 6.4g of `X=6.4/64xxN_(A)=N_(A)/10`
= 1 bcc unit cell `-=` 2 atom
`thereforeN_(A)/10` no. of atom `-=N_(A)/20` no. of bcc unit cell.
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