What is the number of tetrahedral voids present in 0.5 mole of compound forming hcp structure?

Step-by-step solution

Number of atoms in 0.5 mole of the compound = 0.5 N_A = 0.5 6.022 10²³ = 3.011 10²³ . In a close-packed structure, the number of tetrahedral voids is twice the number of atoms forming the lattice. Number of tetrahedral voids = 2 3.011 10²³ = 6.022 10²³ . Answer: 6.022 10²³