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 1 c m 3 t i m e s 1 c m 3 5 × 10 6 m 3 t i m e s 1 m o l 63.55 g = 1.40 × 10 5 m o l m 3 {\displaystyle {8.885g \over 1cm^{3}}times{1cm^{3} \over 5\times 10^{6}m^{3}}times{1mol \over 63.55g}=1.40\times 10^{5}{mol \over m^{3}}}
