Molecular velocities of two gases at the same temperature (T) are u₁ and u₂. Their masses are m₁ and m₂ respectively. Which of the following expressions is correct at temperature T?

At 273 K temperature and 76 cm Hg pressure the density of a gas is 1.964 g L^-1. The gas is

For a van der Waals' gas, the term $$\left( {{{ab} \over {{V^2}}}} \right)$$ represents some