The physical properties of the main components in air are as follows: Name, Molecular Formula, Volume (%), Mass (%). Nitrogen, N2: 78.084, 75.52; Oxygen, O2: 20.95, 23.15; Argon, Ar: 0.932, 1.282; Carbon Dioxide, CO2: 0.03, 0.05; Helium, He: 0.00052, 0.00007; Neon, Ne: 0.0018, 0.0012; Krypton, Kr: 0.00011, 0.00033; Xenon, Xe: 0.000008, 0.00004. Boiling point at atmospheric pressure, Vaporization point at atmospheric pressure, Components in air, Triple point, Critical point, Weight per unit volume, Molar mass, Temperature, Pressure, Temperature and pressure: Gas (0°C), Liquid (°C), Kcal/kg, vol (°C), mm/Hg, °C, Mpa, Kg/Nm3, 0.1MPa, Kg/l, 0.1MPa. For oxygen O2: -183.0, 50.9, 20.948%, -218.8, 12.0, -118.8, 4.97, 1.429, 1.140, 32. For nitrogen N2: -195.8, 47.6, 78.086%, -210.0, 94.6, -147.1, 3.35, 1.250, 0.808, 28. For argon Ar: -185.7, 38.9, 0.932%, -189.4, 512.2, -122.5, 0.48, 1.734, 1.402, 40. For krypton Kr: -153.2, 25.8, 1.1 ppm, -158.2, 550.0, -63.8, 5.42, 3.743, 2.155, 83.7. For xenon Xe: -108.1, 23.0, 0.09 ppm, -111.8, 612.0, 16.6, 5.82, 5.896, 3.063, 131.3. For helium He: -268.9, 5.7, 5 ppm, /, /, -268, 0.23, 0.178, 0.125, 4. For neon Ne: -246.1, 20.8, 18 ppm, -248.6, 325.0, -228.8, 2.69, 0.900, 1.204, 20.2. For carbon dioxide CO2: /, /, 400 ppm, -56.6, 0.51 Mpa, 31.3, 7.29, 1.977, 1.178, 44. For air: -191.5, 49.1, /, /, /, -140.7, 3.72, 1.293, 0.995, 28.9