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 formulasVariables
| n | Volume number density (m-3) |
| NA | Avogadro constant |
| M1 | Molar mass of one constituent (kg/mol) |
| M2 | Molar mass of the other constituent (kg/mol) |
| m1 | Mass of one constituent (kg) |
| m2 | Mass of the other constituent (kg) |
| V | The total volume (m3) |