Chemistry - Solid State Question with Solution | TestHub

The packing efficiency of a body-centered cubic (bcc) unit cell is $68\%$.

This implies that $68\%$ of the total volume of the unit cell is occupied by the constituent particles.

Given the volume of the unit cell, $V=8.0\times 10^{-23}{\mathrm{cm}}^3$.

Volume occupied by all particles = $\frac{68}{100}\times V$

Volume occupied by all particles = $0.68\times 8.0\times 10^{-23}{\mathrm{cm}}^3=5.44\times 10^{-23}{\mathrm{cm}}^3$.

Answer: $5.44\times 10^{-23}{\mathrm{cm}}^3$