An element with molar mass 27 g mol^(-1) forms a cubic unit cell with edge length 4.05 xx 10^(-8) cm. If its density is 2.7 g cm^(-3), what is nature of cubic unit cell ?

An element with molar mass 27 g mol^(-1) forms a cubic unit cell with

1.	An element with molar mass 27 g mol^(-1) forms a cubic unit cell with edge length 4.05 xx 10^(-8) cm. If its density is 2.7 g cm^(-3), what is nature of cubic unit cell ?
Answer» SOLUTION :`rho=(ZxxM)/(a^3xxN_A)` or `Z=(rhoxxa^3xxN_A)/M=((2.7 G cm^(-3))(4.05xx10^(-8)cm)^3(6.02xx10^23 mol^(-1)))/(27 g mol^(-1))=4` Hence, it has face-centred cubic UNIT cell.