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Mole Fraction Calculator — Free Online Tool
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Mole Fraction Calculator

Calculate the mole fraction (X) of components in a mixture

Formula: XA = nA / (nA + nB + ...)
The sum of mole fractions of all components in a mixture is always exactly equal to 1. Supports up to 3 components (leave component C at 0 if binary).
Component Moles

Calculation Results

⚠️ Mole fraction (X) is a dimensionless quantity (unitless ratio) and is independent of temperature and pressure. It is widely used in calculating partial pressures (Dalton's Law) and vapor pressure lowering (Raoult's Law).

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