Ideal gas law (Molar form)

Description

The ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The state of an amount of gas is determined by its pressure, volume, and temperature. The equation of state applies only to an ideal gas, or as an approximation to a real gas that behaves sufficiently like an ideal gas.
How much gas is present could be specified by giving the mass instead of the chemical amount of gas. Therefore, an alternative form of the ideal gas law may be useful. The chemical amount (n) is equal to the mass (m) divided by the molar mass (M).