Question
Calculate molecular diameter of He from its Van der Waal's constant b=24ml/mole.
Joshi sir comment
b = 4V, where V is volume of 1 mole particles
so 24*10-6 cm3/mole = 4*[4πr3/3] cm3/mole
now solve
b = 4V, where V is volume of 1 mole particles
so 24*10-6 cm3/mole = 4*[4πr3/3] cm3/mole
now solve