A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is $2.72 \; g \;cm^{–3}$. The molar mass of the metal is : <br> [NA Avogadro's constant = $6.02 \times 10^{23} mol^{–1}$]

Question

( A ) $27 \; g \; mol^{-1}$
( B ) $30 \; g \; mol^{-1}$
( C ) $20 \; g \; mol^{-1}$
( D ) $40 \; g \; mol^{-1}$