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Density (at STP) 1.784 g/L: ... Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. [10]
Density (at STP) 1.784 g/L: when liquid (at ... Spectral lines of argon: Other properties; Natural occurrence: primordial: Crystal structure
Only certain lighter than air gases are suitable as lifting gases. Dry air has a density of about 1.29 g/L (gram per liter) at standard conditions for temperature and pressure (STP) and an average molecular mass of 28.97 g/mol, [1] and so lighter-than-air gases have a density lower than this.
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Physical property Helium Neon Argon Krypton Xenon Radon; Density, liquid at boiling point and 1 atm (g/dm³) [1]: 125.0: 1207: 1393.9: 2415: 3057: 4400 Density, liquid at triple point (g/dm³) [1]
The molar volume of gases around STP and at atmospheric pressure can be calculated with an accuracy that is usually sufficient by using the ideal gas law. The molar volume of any ideal gas may be calculated at various standard reference conditions as shown below: V m = 8.3145 × 273.15 / 101.325 = 22.414 dm 3 /mol at 0 °C and 101.325 kPa
STP is commonly used for calculations involving gases that approximate an ideal gas, whereas standard state conditions are used for thermodynamic calculations. [ 6 ] For a given material or substance, the standard state is the reference state for the material's thermodynamic state properties such as enthalpy , entropy , Gibbs free energy , and ...
In air at STP the mean free path of molecules is about 96 nm. Since electrons are much smaller, their average distance between colliding with molecules is about 5.6 times longer, or about 0.5 μm. This is a substantial fraction of the 7.5 μm spacing between the electrodes for minimal arc voltage.