Mole fraction

Description

In chemistry, the mole fraction is defined as the amount of a constituent divided by the total amount of all constituents in a mixture.The mole fraction is also called the amount fraction. It is identical to the number fraction, which is defined as the number of molecules of a constituent divided by the total number of all molecules . It is one way of expressing the composition of a mixture with a dimensionless quantity (mass fraction is another).

Related formulas

Variables

χmole fraction (dimensionless)
niamount of a constituent (dimensionless)
ntottotal amount of all constituents (dimensionless)