The density of a sample of FCC palladium is 11.98 g/cm 3 and

The density of a sample of FCC palladium is 11.98 g/cm 3 and its lattice parameter is 3.8902a. Calculate the fractions of the lattice points that contain vacancies and the total number of vacancies in a cubic centimetre of Pd. The atomic weight for palladium is 106.4g/mol