Explanation:
Density of air = 1.20 g/L = [tex]\frac{1.20\times 10^{-3}kg}{10^{-3}m^3}=1.2kg/m^3[/tex]
Size of room is 24.0m by 15.0 m by 4.0 m
Volume of room = 24 x 15 x 4 = 1440 m³
We know the equation
Mass = Volume x Density
Mass = 1440 x 1.2
Mass = 1728 kg
Mass of air in a room that measures 24.0 m by 15.0 m by 4.0 m is 1728 kg.
