# Mass Fraction of Vapor Phase

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vCalc.Mass Fraction of Vapor Phase
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The Mass Fraction of Vapor Phase calculator compute the fractional portion of mass based on the mass of the liquid and mass of the vapor.

INSTRUCTIONS: Choose units and enter the following:

• (mg) This is the mass of the vapor
• (mf) This is the mass of the liquid

Mass Fraction (x): The calculator returns the fraction as a real number.

#### The Math / Science

This equation computes the mass fraction of a substance in vapor phase from the mass in vapor and the mass in liquid.  The formula for the mass fraction of vapor phase is:

x = mg/(mg + mf)

where