From Poor QT’s Almanack

National Mole Day
Today is National Mole Day, after the unit of chemistry, the mole, which is the amount of substance of a system that contains as many elementary entities as there are atoms in 0.012 kilograms of carbon-12, these entities being molecules, atoms, ions, electrons or other subatomic particles, or groups of particles, the number being 6.02214 X 10 to the 23rd power, or 602.214 billion trillion.
Party!

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