10m3 of air weighs 13 kg. how much does the air weigh in a room that is 4.2m long, 3.5m wide, and 2.6m high?

For this case, we need to know the density of the air. Density is a physical property of a substance that represents the mass of that substance per unit volume. From the given values, it is calculated as follows:

Density = 13/10 = 1.3 kg/m^3

Mass of air in the room = 1.3 (4.2 x 3.5 x 2.6) = 49.69 kg