Mole Day

This posting is dedicated to Vanda and Camron. Vanda because she just shakes her head at some of my posts, and Camron because he introduced me to PI day earlier this year.

Now it is Mole Day’s turn.

Mole Day is celebrated each year on October 23 from 6:02 a.m. to 6:02 p.m.

Mole Day commemorates Avogadro’s Number (6.02 x 10^23), which is a basic measuring unit in chemistry. The purpose of Mole Day is to encourage interest in chemistry.

Around the United States, Canada and the world schools will celebrate Mole Day with various activities related to chemistry and/or moles.

For a given molecule, one mole is a mass (in grams) whose number is equal to the atomic mass of the molecule. For example, the water molecule has an atomic mass of 18, therefore one mole of water weighs 18 grams.

An atom of neon has an atomic mass of 20, therefore one mole of neon weighs 20 grams. In general, one mole of any substance contains Avogadro’s Number of molecules or atoms of that substance. This relationship was first discovered by Amadeo Avogadro (1776-1858) and he received credit for this after his death.

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