On This Day In Chemistry

August 9th

Italian chemist Amedeo Avogadro was born on this day in 1776

He was one of the founders of physical chemistry and is most famous for Avogadro’s Law, which states that equal volumes of different gases contain the same number of molecules. In 22.4 litres of any gas at room temperature and pressure there are 6.02214 x 1023 molecules, known as Avogadro’s number.

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