Question

why humid air is less dense ?​

Answer 1

●The units of density are mass divided by volume (m/V).

●Thus, when water vapor increases, the amount of Oxygen and Nitrogen decrease per unit volume and thus density decreases because mass is decreasing.

Answer 2

The units of density are mass divided by volume (m/V). Thus, when water vapor increases, the amount of Oxygen and Nitrogen decrease per unit volume and thus density decreases because mass is decreasing.