Chemistry - Solid State Question with Solution | TestHub

$\text{M}=\frac{\text{ρ}\times {\text{a}}^3{\text{N}}_{\text{A}}}{\text{Z}}$

$=\frac{10\times {\left(100\right)}^3\times 6.02\times {10}^{23}\times {10}^{-30}}{4}=1.505$

∴number of atoms in 100 g$=\frac{6.02\times 10^{23}}{1.505}\times 100$

$=4\times 10^{25}$