Density of Gases

The density and molar mass of common gases at standard test conditions

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The density of gases have been listed below in alphabetical order in the units of both metric and imperial. The chemical formula as well as molar mass has also been listed.
below the table is an image version for offline viewing

GasChemical FormulaMolar massDensityDensity
g/molkg/m3lb/ft3
Air28.961.27400.0748
AmmoniaNH317.030.74910.0440
ArgonAr39.951.75720.1032
Bio Gas35% CO2 65% CH425.831.13630.0668
ButaneC4H1058.122.55670.1502
ButyleneC4H856.112.46810.1450
Carbon DioxideCO244.011.93590.1137
Carbon MonoxideCO28.011.23210.0724
ChlorineCl270.913.12050.1833
EthaneC2H630.071.32270.0777
EthyleneC2H428.051.23400.0725
HeliumHe4.000.17610.0103
HexaneC6H1486.183.79080.2227
HydrogenH22.020.08870.0052
MethaneCH416.040.70570.0415
NitrogenN228.011.23230.0724
OxygenO232.001.40760.0827
PentaneC5H1272.153.17380.1865
PropaneC3H844.101.93970.1140
PropyleneC3H642.081.85100.1088
Sulfur DioxideSO264.062.81910.1656
Density of Gases tables
Density of Gases tables

3 COMMENTS

  1. I know only molecular formula and molecular weight of compound, is possible to calculate vapor density? If any one have solution, please put here

  2. hello paul. I have a question here. if I have the ACH value of the room, then I can get the CFM from it right? Then from CFM I can get mass flow rate (m dot) from CFM by multiplying it with the density of air, right? then I can get the cooling load for a room by multiplying m dot with delta h (enthalpy) right?

    thank you in advance!

  3. Hi,

    How to calculate a container having 500kg of liquidated argon gas into cylinder bottle having a temp of 20 to 30 degree cellius.

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