Question

An element $X$ crystallises in $BCC$ lattice. The edge length of unit cell is $5\overset{^\circ }{A}$ If molar mass of $X$ is $125gmol^{- 1},$ then calculte density of crystal.

• A. $5gcm^{- 3}$
• B. $2.66gcm^{- 3}$
• C. $1.5gcm^{- 3}$
• D. $3.33gcm^{- 3}$

Answer 1

Answer: (D)

$d=\frac{ZM}{N_{A} \times a^{3}}$