Oxygen
| O2 PHYSICAL PROPERTIES |
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| US Units | SI Units | |
| Chemical formula | O2 | O2 |
| Molecular weight | 31.9988 | 31.9988 |
| Density of the gas at 70°F(21.1 °C)and 1atm. | 0.08279 lb /ft3 | 1.326 m3/kg |
| Specific gravity of the gas at 70°F (21.1°C)and 1 atm | 1.105 | 1.105 |
| Specific volume of the gas at 70°F (21.1°C) and 1 atm | 12.05 ft3 | 0.752 m3/kg |
Density of the liquid at boiling point and 1 atm |
71.23 lb/ft3 | 1141 m3/kg |
| Critical temperature | -181.4°F | -118.6°C |
| Critical pressure | 731.4 psia | 5043 KPa,abs |
| Critical density | 27.23 lb/ft3 | 436.1 m3/kg |
| Boiling point at 1 atm | -297.3 °F | -182.9 °C |
| Solubility in water vol/vol at 32°F(0°C) | 0.0489 | 0.0489 |
| Freezing point | -361.1°F | -218°C |
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