Silver (atomic weight = $107.88$) crystallises with f.c.c lattice for which the side length of the unit cell is $4.0774\overset{\circ}{A}$. Density of $Ag$ is $10.53\; g\;cm^{-3}$. Calculate the Avogadro's number.

Question

$(a)\;6.023\times10^{23}\qquad(b)\;6.045\times10^{23}\qquad(c)\;6.045\times10^{22}\qquad(d)\;6.023\times10^{22}$