Avogadro's Law , also known as Avogadro's Principle or Avogadro's Hypothesis, is a gas law that states that the total number of molecules / atoms of a gas (i.e., the amount of a gaseous substance) is also directly proportional to the volume of a gas occupies at a constant temperature and pressure. Learn about Avogadro ' s law , a fundamental principle in chemistry that relates the volume of a gas to the number of molecules. Find out how to use the formula, graph, constant, and examples to solve problems involving gases. Avogadro Law Statement Amedeo Avogadro , an Italian chemist, and scientist, proposed Avogadro’s Law , which states that equal volumes of all gases under identical temperature and pressure circumstances contain an equal number of molecules. If two distinct gases with the same temperature and pressure occupy the same volume, their number of molecules will be the same. We get the same number of moles of gases if we divide their number of molecules by a set number, (6.023 " 10 23), which is the ... Avogadro’s law , a statement that under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules. This empirical relation can be derived from the kinetic theory of gases under the assumption of a perfect (ideal) gas.
