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Density at 0°C and atmospheric pressure
| Gas | Molecular weight | kg/m³ | lb/ft³ |
|---|---|---|---|
| Acetylene | 26 | 1.170 | 0.0729 |
| Air | — | 1.293 | 0.0806 |
| Ammonia | 17 | 0.769 | 0.0480 |
| Blast furnace gas | — | 1.250 | 0.0780 |
| Carbon dioxide | 44 | 1.977 | 0.1234 |
| Carbon monoxide | 28 | 1.250 | 0.0780 |
| Combustion products | — | 1.11 | 0.069 |
| Ethyline | 28 | 1.260 | 0.0786 |
| Hydrogen | 2 | 0.0899 | 0.0056 |
| Methane | 16 | 0.717 | 0.0447 |
| Nitrogen | 28 | 1.250 | 0.0780 |
| Oxygen | 32 | 1.429 | 0.0892 |
| Sulphur dioxide | 64 | 2.926 | 0.1828 |