Room dimensions: length 4m, width 2.5m, height 2m. Determine the mass of air that occupies the entire volume of the room

Room dimensions: length 4m, width 2.5m, height 2m. Determine the mass of air that occupies the entire volume of the room, if its density is 1.3 kg / m3 in a cube?

It is known that mass can be found using the formula m = V * ρ, where m is the mass, V is the volume, and ρ is the density of the substance.
Let’s find the volume of the room using the formula V = l * w * h, where l, w and h are the length, width and height of the room, respectively.
V = 4 m * 2.5 m * 2 m = 20 m ^ 3.
Now let’s find the mass of air in the room.
m = V * ρ = 20 m ^ 3 * 1.3 kg / m ^ 3 = 26 kg.
Answer: m = 26 kg.