Chemistry - Solid State Question with Solution | TestHub

Number of atoms in $0.5$ mole of the compound $=0.5\times N_A=0.5\times 6.022\times 10^{23}=3.011\times 10^{23}$.

In a close-packed structure, the number of tetrahedral voids is twice the number of atoms forming the lattice.

Number of tetrahedral voids $=2\times 3.011\times 10^{23}=6.022\times 10^{23}$.

Answer: $6.022\times 10^{23}$