Copper crystallizes into a fcc lattice with edge length 3.61xx10^(-8) cm. Show that the calculated density is in agreement with its measured value of 8.92 "g cm"^(-3).

Copper crystallizes into a fcc lattice with edge length 3.61xx10^(-8)

1.	Copper crystallizes into a fcc lattice with edge length 3.61xx10^(-8) cm. Show that the calculated density is in agreement with its measured value of 8.92 "g cm"^(-3).
Answer» SOLUTION :`rho=(ZxxM)/(a^3xxV_0)` For fcc LATTICE of copper , Z=4 Atomic mass of copper , `M=63.5 "g MOL"^(-1)` `therefore rho=(4xx63.5 "g mol"^(-1))/((3.61xx10^(-8) cm)^3xx(6.022xx10^23 "mol"^(-1)))=8.97 "g cm"^(-3)` which is in CLOSE agreement with the measured value.