A vessel contains $1 \mathrm{mole}$ of ${\mathrm{O}}_2$ gas (molar mass $32$) at a temperature $\mathrm{T}$. The pressure of the gas is $\mathrm{p}$. An identical vessel containing one mole of the gas (molar mass $4$) at a temperature $2\mathrm{T}$ has a pressure of