Chemistry - Solid State Question with Solution | TestHub

Let number of atoms are $\mathrm{N}$ Mass of one atom $=2.43/\mathrm{N}$ $\mathrm{d}=\frac{\mathrm{Z}\times \text{ mass of one atom }}{\text{ Volume of unit cell }}[\mathrm{Z}=2$ for $\mathrm{BCC}]$ $$9=\frac{2\times 2.43/\mathrm{N}}{2.7\times 10^{-23}}\mathrm{N}=\frac{2\times 2.43}{2.7\times 10^{-23}\times 9}=2\times 10^{22}$$