Mole Fraction Calculator

Two-Component Solution

Moles of Component A (solute)

Moles of Component B (solvent)

Three-Component Solution

Moles of Component A

Moles of Component B

Moles of Component C

Formula

χ_A = n_A / (n_A + n_B + ...) | where χ = mole fraction, n = moles

Frequently Asked Questions

What is mole fraction?

Mole fraction (χ) is the ratio of moles of one component to the total moles of all components in a mixture. It is dimensionless and always between 0 and 1. All mole fractions in a mixture sum to 1.

Where is mole fraction used?

Mole fraction is used in Raoult's law for vapor pressure calculations, Dalton's law for partial pressures, and in calculating colligative properties of solutions.

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