According to Avogadro’s law, equal volumes of gases at the same temperature and pressure should contain an equal number of molecules.
Avogadro’s law states that if the gas is an ideal gas, the same number of molecules exists in the system. The law also states that if the volume of gases is equal it means that the number of the molecule will be the same as the ideal gas only when it has equal volume. The above statement can be mathematically expressed as;
V / n = constant
V1 / n1 = V2 / n2
Where V is the volume of an ideal gas and n in the above equation represent the number of gas molecules.