11 Facts About Avogadro constant


Avogadro constant is the proportionality factor that relates the number of constituent particles in a sample with the amount of substance in that sample.

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Numeric value of the Avogadro constant expressed in reciprocal mole, a dimensionless number, is called the Avogadro number.

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In older literature, the Avogadro constant number is denoted N or N0, which is the number of particles that are contained in one mole, exactly 6.

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Value of the Avogadro constant was chosen so that the mass of one mole of a chemical compound, in grams, is numerically equal to the average mass of one molecule of the compound in daltons ; one dalton being.

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Avogadro constant relates the molar volume of a substance to the average volume nominally occupied by one of its particles, when both are expressed in the same units of volume.

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Avogadro constant is named after the Italian scientist Amedeo Avogadro, who, in 1811, first proposed that the volume of a gas is proportional to the number of atoms or molecules regardless of the nature of the gas.

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Name Avogadro constant's number was coined in 1909 by the physicist Jean Perrin, who defined it as the number of molecules in exactly 16 grams of oxygen.

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Value of Avogadro constant's number was first obtained indirectly by Josef Loschmidt in 1865, by estimating the number of particles in a given volume of gas.

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Avogadro constant was awarded the 1926 Nobel Prize in Physics, largely for this work.

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Electric charge per mole of electrons is a Avogadro constant called the Faraday Avogadro constant and has been known since 1834, when Michael Faraday published his works on electrolysis.

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Avogadro constant NA is related to other physical constants and properties.

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