A tractor tyre contains $31 \mathrm{~L}$ of air at a pressure of $190 \mathrm{kPa}$ and a temperature of $30^{\circ} \mathrm{C}$. Using $\mathrm{R}=8.314\mathrm{~J}(\mathrm{gmol})^{-1} \mathrm{~K}^{-1}$ and molecular mass of air $=29 \mathrm{~g}(\mathrm{gmol})^{-1},$ the mass of air contained in the tyre is $\mathrm{M} \times 10^{-3} \mathrm{~kg}$. The value of $\mathrm{M}$ is___________
A tractor tyre contains $31 \mathrm{~L}$ of air at a pressure of $190 \mathrm{kPa}$ and a temperature of $30^{\circ} \mathrm{C}$. Using $\mathrm{R}=8.314\mathrm{~J}(\mathrm{gmol})^{-1} \mathrm{~K}^{-1}$ and molecular mass of air $=29 \mathrm{~g}(\mathrm{gmol})^{-1},$ the mass of air contained in the tyre is $\mathrm{M} \times 10^{-3} \mathrm{~kg}$. The value of $\mathrm{M}$ is___________