Moles and mass of the air in a room

A room measures $5.0\mathrm{m}\times 4.0\mathrm{m}\times 3.0\mathrm{m}$ and contains air at $1.013\cdot 10^5\mathrm{Pa}$ and $20{}^{\circ }\mathrm{C}$. Treating air as an ideal gas with molar mass $29g/mol$, compute the number of moles and the mass of the air.