X-ray diffraction studies show that of copper crystallizes in an fcc unit cell with cell edge of 3.608xx10^(-8) cm. In a separate experiment, copper is determined to have a density of 8.92 g//cm^3, Calculate the atomic mass of copper .

X-ray diffraction studies show that of copper crystallizes in an fcc u

1.	X-ray diffraction studies show that of copper crystallizes in an fcc unit cell with cell edge of 3.608xx10^(-8) cm. In a separate experiment, copper is determined to have a density of 8.92 g//cm^3, Calculate the atomic mass of copper .
Answer» SOLUTION :`RHO=(ZxxM)/(a^3xxN_0)` or `M=(rhoxxa^3xxN_0)/Z` For fcc lattice, Z=4 HENCE, `M=((8.92 G cm^(-3))(3.608xx10^(-8) cm)^3 (6.022xx10^23 "atom mol"^(-1)))/"4 atoms"=63.1 g mol^(-1)` `therefore` Atomic mass of copper =`63.1 g mol^(-1)`