October 23: Mole Day



Mole Day is a day to celebrate “mole,” the base unit in chemistry for measuring the substance of a molecule, and uses “mole,” the animal, in its logo.

Mole Day is celebrated each year on October 23 from 6:02 a.m. to 6:02 p.m. The number of molecules in one mole, according to Avogadro’s Constant,  is 6.0221415 x 1023.


Avogadro’s Constant was formulated by Amadeo Avagadro (1776-1858), an Italian nobleman (his full name was Lorenzo Romano Amedeo Carlo Avogadro di Auaregna e di Cerrreto, Count of Auaregna and Cerreto.) Amadeo was professor physics at the University of Turin.

AMEDEO-1Amadeo Avogadro

To learn more about Mole Day, click here to get to the website of The National Mole Day Foundation.


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