Chemistry - Solid State Question with Solution | TestHub

Mass of one unit cell is given by the product of its volume and density.

Mass of one unit cell = $6.65\times 10^{-23}$ g

Total mass of the metal = $0.5$ g

Number of unit cells = $\frac{\text{Total mass}}{\text{Mass of one unit cell}}$

Number of unit cells = $\frac{0.5}{6.65\times 10^{-23}}$

Number of unit cells = $7.518\times 10^{21}$

Answer: $7.518\times 10^{21}$