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Argon

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

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