How many tetrahedral voids are present in 0.4 mole of a compound that forms hcp structure?

Step-by-step solution

In HCP structure for each atom one octahedral void and two tetrahedral voids will be present. No. of atoms =0.4 N _ A =0.4 6.022 10²³ No. of tetrahedral voids = No. of atoms 2 aligned & =0.4 6.022 10²³ 2 & =4.8 10²³ aligned