Happy Mole Day! Also, What the Hell Is Mole Day?

This site may earn affiliate commissions from the links on this page. Terms of use. Today, October 23, is Mole Day — the unofficial holiday when we celebrate Amedeo Avogadro and his contributions to molecular theory. In 1811, Avogadro hypothesized that given two volumetrically identical samples of gas at an equal temperature and pressure contained […]

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