Gaseous State

At \(600 \mathrm{~K}\), the root mean square (rms) speed of gas \(\mathrm{X}\) (molar mass \(=40\) ) is equal to the most probable speed of gas \(\mathrm{Y}\) at \(90 \mathrm{~K}\). The molar mass of the gas \(\mathrm{Y}\) is ___________ \(\mathrm{g} ~\mathrm{mol}^{-1}\). (Nearest integer)