Question

A metal crystallises face-centred cubic lattice with edge length of 450pm. Molar mass of the metal is 50 g `"mol"^(-1)` . The density of metal will be :
A. `2.64 g cm^(-3)`
B. `3.64 g cm^(-3)`
C. `4.64 g cm^(-1)`
D. `2.68 g cm^(-3)`

Answer 1

Correct Answer - B
Density `rho=(ZM)/(a^(3)xxN_(A))=(4xx50)/((450xx10^(-10))^(3)xx6.023xx10^(23))`
`=3.64 g cm^(-3)`