Argon
| AR PHYSICAL PROPERTIES | ||
| US Units | SI Units | |
| Chemical formula | Ar | Ar |
| Molecular weight | 39.95 | 39.95 |
| Density of the gas at 32°F(0°C)and 1atm. | 0.103 lb /ft3 | 1.650 m3 |
| Specific gravity of the gas 70°F (21.1°C) and 1 atm (air=1) | 1.38 | 1.38 |
| Specific volume of the gas at 70°F (21.1°C) and 1 atm | 9.71 ft3/lb | 0.606 m3/kg |
| Density of the liquid at 70°F (21.1°C) | 87.02 lb/ft3 | 1394 m3 |
| Melting point at 1atm | 308.6°F | -189.2°C |
| Critical temperature | -188.1°F | -122.3°C |
| Critical pressure | 711.5 psia | 4906 KPa,abs |
| Critical density | 33.44 lb/ft3 | 535.6 m 3 |
| Boiling point at 1 atm | -302.6°F | -185.9°C |
| Solubility at 32°F(0°C) | 1.67 | 1.67 |
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