Does gas have density?

6 Answers
this is my new question: does gas have density?, thanks collaborators

Yes they do. Density is mass per unit volume. While a gas is much less dense than a solid or a liquid its density can still be measured.

The density of a gas can be calculated using the ideal gas law, PV = nRT.

First substitute mass/molar mass for the moles.

PV = massRT/Molar mass

Then rearrange the equation to solve for the density (or the mass/ the volue)

density = mass/V = P molar mass/ RT.

Real gases will vary a little depending on their intermolecular interactions.


Yes. The density of gases is the least from amongst the three states of matter. The molecules of constituent gases are at very large distances from each other as compared to the molecules of solids and liquids. That is why in the same volume of a gas, there are very few number of molecules of the gas than there are in the same volume of solids and liquids: Thus the weight of a gas per unit volume , or density, is very low as compared to that of solids and liquids.


Yes, gases do have their own density. However, the common term used is heavy and light. Hydrogen is the lightest gas known, meaning its density (0.08 grams per liter) is the smallest of all naturally existing gases. We also say Radon is the heaviest gas, meanings it has the highest density of 9.68 grams per liter. 1.429 g per liter is the density of oxygen. Naturally existing atmosphere, which we call air, has a density of 1.3 g per liter.


Yes all gasses have density because gas is matter and has mass.
The volume of a gas increases with temperature and since density = mass / volume, the density of the gas will decrease. This is why hot air rises.
The mass of a cubic meter of air is about 1.2 kilos.


Yes, all gases have density, but the density varies a great deal depending on temperature, pressure and volume, among other things. All conditions being the same, different types of gases will have different densities depending on what they're made of.


Yes. Gas does have density. The density of gas (which is considered a fluid) is always going to be equal to a given amount of that gas divided by the volume that that same amount of gas occupies.

Hopes this helps.