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The edge length of the unit cell of NaCl...

The edge length of the unit cell of NaCl crystal lattice is 5.623 Å and density is `2.16 g cm^(-3)` and the molar mass of NaCl is `58.5 g mol^(-1)`. The number of moles per unit cell is

A

4

B

3

C

1

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
`rho = (ZxxM)/(N_A xx a^3)=(2.16xx6.023xx10^(23) (5.623xx10^(-8))^3)/(58.5)~~4`
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