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The Avogadro constant (symbols: L, NA) is the number of "elementary entities" (usually atoms or molecules) in one mole, that is (from the definition of the mole), the number of atoms in exactly 12 grams of carbon-12.[2][3] It was originally called Avogadro's number. The 2006 CODATA recommended value is[1]:

The Avogadro constant is named after the early nineteenth century Italian scientist Amedeo Avogadro, who, in 1811, first proposed that the volume of a gas (at a given pressure and temperature) is proportional to the number of atoms or molecules regardless of the nature of the gas.

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15y ago

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The number of particles in a mole - for example, the number of hydrogen atoms in a gram.

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15y ago
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It is 6.022x10^23

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14y ago
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6.02 *10^23

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14y ago
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