Silver crystallizes in a face centred cubic system, 0.408 nm along each edge. The density of silver is 10.6 and the atomic mass is 107.9 g/mol. Calculate Avogadro's number.
(1) The unit cell has a volume of (0.408 per unit cell and contains four atoms. The volume of 1 mole of silver is,
; where 107.9 g/mol is the molecular mass of the silver
The number of unit cells per mol. is,
unit cells per mol.
and the number of atoms per mol. is, atom/mol.