Calculate the number of atoms present in 1.58 g metal if it forms bcc structure.

$$\left[\rho \times \mathrm{a}^3=1.58 \times 10^{-22} \mathrm{~g}\right]$$

What is the total number of tetrahedral voids in 0.6 mole of compound that forms hcp structure?

Calculate the number of unit cells in 0.4 g metal if the product of density and volume of unit cell is $1.2 \times 10^{-22} \mathrm{~g}$.