The pressure exerted by 6.0 g of methane gas in a 0.03 m^3 vessel at 129°C is (Atomic masses: C =12.01, H =1.01 and R =8.314 JK^-1 mol^-1 )

The pressure exerted by $\displaystyle 6.0$ g of methane gas in a $\displaystyle 0.03 \mathrm{~m}^3$ vessel at $\displaystyle 129$°C is (Atomic masses : $\displaystyle \mathrm{C}=12.01, \mathrm{H}=1.01$ and $\displaystyle \mathrm{R}=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ )