Q.8

8. The critical density of the gas CO₂ is 0.44 g cm^-3 at a certain temperature. if r is the radius of the molecule, r³ in cm³ is approximately. ( N is Avogadro number).
$\left(\mathrm{A}\right) \frac{25}{\mathrm{\pi N}} \left(\mathrm{B}\right) \frac{100}{\mathrm{\pi N}} \left(\mathrm{C}\right) \frac{6}{\mathrm{\pi N}} \left(\mathrm{D}\right) \frac{25}{4\mathrm{N\pi }}$