$A$ 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 ................. $g \, mol^{-1}$.
($N_A$ Avogadro's constant $= 6.02 \times 10^{23} \, mol^{-1}$)
($N_A$ Avogadro's constant $= 6.02 \times 10^{23} \, mol^{-1}$)
- A$27$
- B$20$
- C$40$
- D$30$
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