Concentration count per volume 0 0 1 0 L-3N1 0 http://qudt.org/vocab/quantity#AmountOfSubstancePerUnitVolume Distinct from inverse volume in that there is something specific being counted within each unit volume. Inverse volume implies a truly dimensionless numerator. Mole per cubic meter (mol/m^3) or per cubic meter (1/m^3) -3 Amount of substance or a count/number of items per unit volume. Concentration impliles the amount of one substance/item within another substance. QUDT 0 Chemistry ODM2 Working Group A vocabulary for describing the type of the Unit or the more general quantity that the Unit represents. ODM2 Units Type Controlled Vocabulary