Amagat
An amagat is a practical unit of number density. Although it can be applied to any substance at any conditions, it is defined as the number of ideal gas molecules per unit volume at 1 atm and 0 °C. It is named after Émile Amagat, who also has Amagat's law named after him. The abbreviated form of amagat is "amg". The abbreviation "Am" has also been used.The amg unit for number density can be converted to the SI unit mol/m3 by the formula:
The conversion factor is called "Loschmidt number".
The number density of an ideal gas at pressure p and temperature T can be calculated as
where T0 = 273.15 K and p0 = 101.325 kPa.Example
Number density of an ideal gas at room temperature and 1 atm is
