Chemistry - Solid State Question with Solution | TestHub

$$\begin{array}{rl}& \text{ Density }=\frac{\text{ mass of atomsin unitcell }}{\text{ Volume of unitcell }}\\ & \text{ mass of atoms in unit cell }=\frac{\mathrm{Z}\times \mathrm{M}}{{\mathrm{N}}_{\mathrm{A}}}=\frac{2\times 25}{6.023\times 10^{23}}\\ & \text{ Volume of unit cell }=\frac{2\times 25}{6.02\times 10^{23}\times 3}=2.76\times 10^{-23}{\mathrm{cm}}^3\end{array}$$