Gabriella Balaa

Mole Day is an unofficial holiday celebrated among chemists on Oct. 23, between 6:02 a.m. and 6:02 p.m. The time and date are derived from Avogadro’s number. Ekaterina_Minaeva/Shutterstock.com

A day to celebrate chemistry’s favorite unit — the mole. But what’s a mole?

Chemists sure know how to party. And here is the proof. On October 23rd they celebrate their hallowed unit: the mole. Find out what that’s all about.

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