Avogadro constant
fundamental physical constant (symbols: L, Nᴀ) representing the molar number of entities / From Wikipedia, the free encyclopedia
The Avogadro constant (symbols: L, NA) is the number of particles (usually atoms or molecules) in one mole of a given substance.[2] Its value is equal to 6.02214129(27)×1023 mol−1.[3] The constant was named after the Italian scientist Amedeo Avogadro.
More information Value of NA in various units ...
Value of NA[1] in various units |
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6.02214179(30)×1023 mol−1 |
2.73159757(14)×1026 lb-mol−1 |
1.707248479(85)×1025 oz-mol−1 |
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The measurement of Avogadro's constant was refined in 2011 to 6.02214078×1023 ± 0.00000018×1023.[4]
An old term closely related to the Avogadro constant is Avogadro's number. Avogadro's number is the number of atoms in 12 grams of the carbon isotope carbon-12. Avogadro's number is a dimensionless quantity and has the numerical value of the Avogadro constant given in base units.