What Does Avogadro's Law State?

Avogadro's law states the principle that equal volumes of all gases (given the fact that temperature and pressure is same) contain equal numbers of molecules. From Avogadro's law we can also understand that identical number of molecules of any gas under the same conditions occupy equal volumes. Therefore, when the temperature and pressure are identical, the gram-molecular weights of all gases contain the same amount of volume.  The law was the brainchild of the illustrious Italian scientist Amedeo Avogadro who wrote the hypothesis in the year 1811.

The law as given in the research paper states that the volume occupied by 1mole   of gas (at a standard temperature of 32° Fahrenheit  (0 °Celsius) and 1 atmosphere of pressure) is the same for all gases (0.791 cubic feet (22.4 litres). The formula given below states the law mathematically:

V/n=a -where V: volume of the gas N: number of moles in the gas A: constant.