the density of air is 1.29 kg/m^3. What is the mass of air in a room that is 4.50 m x 7.88 m x 13.0 m?
Mass = Density * Volume
So
Mass = 1.29 kg / m^3 * (4.5)(7.88)(13)m^3
Mass = (1.29) (4.5)(7.88)(13) kg ≈ 594.66 kg