Chemistry - Solid State Question with Solution | TestHub

Total volume of the element $V=\frac{\text{Mass}}{\text{Density}}$

$V=\frac{100}{9.0}{\text{ cm}}^3$

Number of unit cells $=\frac{\text{Total volume}}{\text{Volume of one unit cell}}$

Number of unit cells $=\frac{100}{9.0\times 4.445\times 10^{-23}}$

Number of unit cells $=\frac{100}{40.005\times 10^{-23}}$

Number of unit cells $\approx 2.5\times 10^{23}$

Answer: $2.5\times 10^{23}$