What are the number of octahedral and tetrahedral voids in 0.3 mole substance respectively if it forms hcp structure?

Step-by-step solution

Number of atoms in 0.3 ~mol aligned & =0.3 N _ A & =0.3 6.022 10²³ & =1.8066 10²³ aligned i. For hep structure, Number of octahedral voids = Number of atoms =1.8066 10²³ ii. For hcp structure, Number of tetrahedral voids aligned & =2 Number of atoms & =2 1.8066 10²³ & =3.6132 10²³ aligned