Question

At what temperature(in celcius) will oxygen molecules have the same K.E as ozone molecules at ${30}^{o}C$

Answer 1

Average kinetic energy $=\frac{1}{2}m{v}_{rms}^2=\frac{1}{2}m{\left(\sqrt{\frac{3RT}{m}}\right)}^2=\frac{3}{2}RT$

So, average kinetic energy of the molecules is independent of the type of molecules as the equation does not contain any molecular weight term. So, at 30$℃$ both $O_2$ and $O_3$ have same kinetic energy.