Number density (Relation to Mass density)

Description

Number density is an intensive quantity used to describe the degree of concentration of countable objects. For atoms or molecules of a well-defined molecular mass M, the number density can be expressed in terms of the mass density of a substance. ( Molecular mass or molecular weight refers to the mass of a molecule. It is calculated as the sum of the mass of each constituent atom multiplied by the number of atoms of that element in the molecular formula.)

Related formulas

Variables

nVolume number density (m-3)
NAAvogadro constant
M1Molar mass of one constituent (kg/mol)
M2Molar mass of the other constituent (kg/mol)
m1Mass of one constituent (kg)
m2Mass of the other constituent (kg)
VThe total volume (m3)