Cu, density ρ = 8.885 g c m 3 {\displaystyle \rho =8.885{g \over cm^{3}}} , atomic mass m a = 63.57 a m u {\displaystyle m_{a}=63.57amu} , fcc structure
a. In 1 m 3 {\displaystyle 1m^{3}} , the number of moles is 8.885 g ( c m 3 ) x 1 c m 3 / o v e r ( 1 x 10 − 6 m 3 ) x 1 m o l / o v e r ( 63.55 g ) = 1.40 x 10 5 m o l / o v e r m 3 {\displaystyle 8.885{g \over (cm^{3})}x{1cm^{3}/over(1x10^{-}6m^{3})}x{1mol/over(63.55g)}=1.40x10^{5}{mol/overm^{3}}}
