You will need
  • the density of air molar mass of air quantity of air, the volume occupied by the air
Instruction
1
Let us known the volume V, which takes the air. Then, by the well-known formula m = p*V, where p is the density of air, we can find the mass of air in this volume.
2
Density of air depends on its temperature. The density of dry air is calculated using the Clapeyron equation for an ideal gas according to the formula: p = P/(R*T) where P is the absolute pressure, T is the absolute temperature in Kelvin and R is the specific gas constant for dry air (R = 287,058 j/(kg*K)).
At sea level at a temperature of 0oC the density of air equal to at 1.2920 kg/(m^3).
3
If we know the amount of air, its mass can be found by the formula: m = m*V, where V is the amount of substance in moles, and M is the molar mass of air. Average relative molar mass of air equal to of 28.98 g/mol. Thus, substituting it in the formula, you get a lot of air in grams.