Avogadro's law

A·vo·ga·dro's law   (ä'və-gä'drōz, ä'vō-)    n.  The principle that equal volumes of all gases under identical conditions of pressure and temperature contain the same number of molecules.

Main Entry: Avo·ga·dro's law
Pronunciation: "av-&-"gäd-(")rOz-, "äv-, -"gad-
Function: noun
: a law in chemistry: equal volumesof all gases at the same temperature and pressure contain equal numbers of molecules called also Avogadro's hypothesis
Avoágaádro /"av-&-'gäd-(")rO, "äv-/,Count Amedea (1776–1856), Italian physicist and chemist. Avogadro is considered one of the founders of physical chemistry. In 1811, he made his outstanding scientific contribution:his hypothesis, now accepted as a scientific law, that equal volumes of gases at the same temperature and pressure contain the same number of molecules. This hypothesis was a landmark in 19th-centurychemistry and is one of the basic concepts of modern chemistry.

Avogadro's law n.
The principle that equal volumes of all gases under identical conditions of pressure and temperature contain the same number of molecules.