This Law allows us to determine the number of moles in a sample of gas given its volume and that it is at standard temperature and pressure (0 celsius and 100KPa).
often displayed as,
The law is basically in simple terms that samples of gas with the same number of molecules will occupy the same amount of space (volume) if temperature and pressure are constant.
Another rule derived from this is,
This follows the same "ideal" gas principle where,
This is a relationship between gases and their volumes which as Avogadro's law suggests can be used for all gases.