Question

An element (atomic mass `= 100 g//mol`) having bcc structure has unit cell edge 400 pm .Them density of the element is
A. `10.376g//cm^(3)`
B. `5.188g//cm^(3)`
C. `7.289g//cm^(3)`
D. `2.144g//cm^(3)`

Answer 1

Correct Answer - B
`p=(ZxxM)/(a^(3)xxN_(0)xx10^(-30))=(2xx100)/((400)^(3)xx(6.02xx10^(23))xx10^(-30))`
`=5.188g//cm^(3)`