Package javax.measure.quantity

Interface AmountOfSubstance

  • All Superinterfaces:
    Quantity<AmountOfSubstance>
    public interface AmountOfSubstance
extends Quantity<AmountOfSubstance>
    Number of elementary entities (molecules, for example) of a substance. The metric system unit for this quantity is "mol" (mole). The mole, symbol mol, is the SI unit of amount of substance. One mole contains exactly 6.022 140 76 × 10²³ elementary entities. This number is the fixed numerical value of the Avogadro constant, NA, when expressed in the unit mol⁻¹ and is called the Avogadro number. The amount of substance, symbol n, of a system is a measure of the number of specified elementary entities. An elementary entity may be an atom, a molecule, an ion, an electron, any other particle or specified group of particles. This definition implies the exact relation Nₐ = 6.022 140 76 × 10²³ mol⁻¹. Inverting this relation gives an exact expression for the mole in terms of the defining constant NA: 1 mol = 6.02214076 × 10²³ / Nₐ
    API Note:
    SI Base Unit
    Since:
    1.0
    Version:
    2.1
    Author:
    Jean-Marie Dautelle, Werner Keil, Thodoris Bais
    See Also:
    Wikipedia: Amount of Substance