A vessel of $120 \mathrm{mL}$ capacity contains a certain amount of gas at ${35}^{\mathrm{o}} \mathrm{C}$ and $1.2$ bar pressure. The gas is transferred to another vessel of volume $180 \mathrm{mL}$ at ${35}^{\mathrm{o}} \mathrm{C}$. What would be its pressure?

Pressure of $1 \mathrm{g}$ of an ideal gas A at ${27}^{\mathrm{o}} \mathrm{C}$ is found to be $2$ bar. When $2 \mathrm{g}$ of another ideal gas B is introduced in the same flask at same temperature the pressure becomes $3 \mathrm{bar}$. Find a relationship between their molecular masses.