Question

If molar mass of $AB$ is $95 \,g \,mol ^{-1}$ and a is edge length, then the density of crystal structure is

• A. $\frac{4 \times 95}{ a ^{3} \times N _{ A }}$
• B. $\frac{4 N _{ A }}{ a ^{3} \times 95}$
• C. $\frac{2 \times 95}{ a ^{3} \times N }$
• D. $\frac{2 N _{ A }}{ a ^{3} \times 95}$

Answer 1

Answer: (A)

Here number of $AB$ per unit cell $=4$
Density $=\frac{Z \times M}{a^{3} N_{0}}$
$=\frac{4 \times 95}{a^{3} N_{0}}$