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
