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  2. Avogadro constant - Wikipedia

    en.wikipedia.org/wiki/Avogadro_constant

    The Avogadro constant, commonly denoted N A [1] or L, [2] is an SI defining constant with an exact value of 6.022 140 76 × 10 23 mol −1 (reciprocal moles). [3] [4] It is this defined number of constituent particles (usually molecules, atoms, ions, or ion pairs—in general, entities) per mole and used as a normalization factor in relating the amount of substance, n(X), in a sample of a ...

  3. Mole (unit) - Wikipedia

    en.wikipedia.org/wiki/Mole_(unit)

    The Avogadro constant (symbol N A = N 0 /mol) has numerical multiplier given by the Avogadro number with the unit reciprocal mole (mol −1). [2] The ratio n = N/N A is a measure of the amount of substance (with the unit mole). [2] [3] [4]

  4. Avogadro's law - Wikipedia

    en.wikipedia.org/wiki/Avogadro's_Law

    Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." [1] For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.

  5. Amedeo Avogadro - Wikipedia

    en.wikipedia.org/wiki/Amedeo_Avogadro

    In honour of Avogadro's contributions to molecular theory, the number of molecules per mole of a substance is named the Avogadro constant, N A. It is exactly 6.022 140 76 × 10 23 mol −1 . [ 7 ] The Avogadro constant is used to compute the results of chemical reactions.

  6. Gas laws - Wikipedia

    en.wikipedia.org/wiki/Gas_laws

    With the addition of Avogadro's law, the combined gas law develops into the ideal gas law: = where P is the pressure, V is volume, n is the number of moles, R is the universal gas constant and T is the absolute temperature.

  7. Amount of substance - Wikipedia

    en.wikipedia.org/wiki/Amount_of_substance

    Since 2019, the value of the Avogadro constant N A is defined to be exactly 6.022 140 76 × 10 23 mol −1. Sometimes, the amount of substance is referred to as the chemical amount or, informally, as the "number of moles" in a given sample of matter.

  8. Mole Day - Wikipedia

    en.wikipedia.org/wiki/Mole_Day

    Mole Day is an unofficial ... The time and date are derived from the Avogadro constant, which is approximately 6.02 × 10 23, defining the number of particles ...

  9. SI base unit - Wikipedia

    en.wikipedia.org/wiki/SI_base_unit

    mole: mol amount of substance "The mole, symbol mol, is the SI unit of amount of substance. One mole contains exactly 6.022 140 76 × 10 23 elementary entities. This number is the fixed numerical value of the Avogadro constant, N A, when expressed in the unit mol −1 and is called the Avogadro number.