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: