The oxygen molecule has a mass of `5.30 × 10^(-26)` kg and a moment of inertia of `1.94×10^(-46)` kg `m^2` about an axis through its centre perpendicular to the lines joining the two atoms. Suppose the mean speed of such a molecule in a gas is 500 m/s and that its kinetic energy of rotation is two thirds of its kinetic energy of translation. Find the average angular velocity of the molecule.