X-ray diffraction studies show that copper crystallises in an fcc unit cell with cell edge of 3.608 x 108cm. In a separate experiment, copper is determined to have a density of 8.92g cm-3. Calculate the atomic mass of copper.
Edge length ‘a’ = 3.608 x 10-8cm Density (d) = 8.92g cm ,– 3 For fcc “Z’ = 4 Atomic mass ‘M’ = ?
= 63.1 g mol-1 Hence the atomic mass of copper = 63.1g mol-1
