(ii) calculate the density of the material,given that its atomic weight is 141g/mol
(b) Molybdenum (Mo) has a Bcc crystal structure,an atomic radius of 0.1363nm and an atomic weight of 95.94g/mol. compute its theoretical density.
(a) calculate the activation energy for vacancy formation in aluminium,given that the equilibrium number of vacancies at 500 degree (773) is 7.57 x 10^23m^-3. The atomic weight and density (at 500 degree) for aluminium are respectively 26.98g/mol and 2.62g/cm^3