Editing Gas laws (section)

==Avogadro's law==
{{Main|Avogadro's law}}

'''Avogadro's law''', '''Avogadro's hypothesis''', '''Avogadro's principle''' or '''Avogadro-Ampère's hypothesis''' is an experimental gas law which was hypothesized by [[Amedeo Avogadro]] in 1811. It related the volume of a gas to the [[amount of substance]] of gas present.<ref name="Britannica">{{cite encyclopedia |entry=Avogadro's law |encyclopedia=[[Encyclopædia Britannica]] |access-date=3 February 2016 |entry-url=http://www.britannica.com/science/Avogadros-law}}</ref>

=== Statement ===
Avogadro's law states that:
{{Block indent|quote=The volume occupied by an ideal gas at a constant temperature is directly proportional to the number of molecules of the gas present in the container.}}
This statement gives rise to the [[molar volume]] of a gas, which at [[Standard temperature and pressure|STP]] (273.15&nbsp;K, 1 atm) is about 22.4&nbsp;L. The relation is given by:

:<math>V \propto n\,</math>, or<math display="block">\frac{V_1}{n_1}=\frac{V_2}{n_2}    \,</math>where ''n'' is equal to the number of molecules of gas (or the number of moles of gas).