This post gives information about the definition and formula of Atomic fraction, Volume Fraction, and Pressure Fraction.
Atomic fraction
The atomic fraction of an element in a mixture is the ratio of the number of atoms of that element in the mixture and the number of atoms of all the elements present in the mixture.
Atomic fraction formula
Atomic fraction = Number of atoms of the component / total number of atoms of all the components in the mixture
Atomic %(percentage) of Composition = Atomic fraction ✖ 100
Volume Fraction
The volume fraction of a component in a mixture is the ratio of the defined partial volume (net component volume) of that component to the total volume of the mixture.
The formula of Volume Fraction
Volume Fraction = Partial Volume/Total Volume
Volume percentage (%) of Composition = Volume Fraction * 100
Pressure Fraction
The pressure fraction of a gas present in a gasses mixture is the ratio of the partial pressure of that gas to the total pressure of the gasses mixture.
The formula of Pressure Fraction
Pressure fraction = Partial pressure of gases/Total pressure of the gas
Pressure percentage (%) of Composition = 100 x Pressure fraction
What are molarity and normality?
Molarity
The number of moles of a substance present in 1 liter of a solution is called the molarity of the solution.
Normality
The number of gram equivalents present in 1 liter of a solution is called the normality of that solution.
Normality (N) = Number of gram equivalents of substance/volume of solution in liters.
Also Read: What are Reactants in Chemistry