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Physical Science of Water

Author(s): David R. Caprette, PhD

Avogadro's Principle

Amadeo Avogadro is responsible for some of the most important advances in our understanding of the structure and behaviors of gases. However, among most of us he is best known for the number that bears his name. Avogadro’s number (6.02 x 1023), is the number of atoms in 12 grams of pure carbon. The number, of course, is called the mole. 

You might be surprised to know that Avogadro never calculated Avogadro’s number. The principles that Avogadro demonstrated or suggested helped advance the theory that explains atoms and molecules, and made the concept of the mole possible.