"Avogadro\'s law." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/avogadro-s-law>.
Avogadro\'s law. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/avogadro-s-law
The principle that equal volumes of all gases under identical conditions of pressure and temperature contain the same number of molecules. Avogadro's law is true only for ideal gases (gases in which there is no interaction between the individual molecules).