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Mole Fraction Calculator

Mole fraction of solute and solvent in a two-component mixture, with mole percent.

Enter values

Results update as you type.

Result

Mole fraction of solute

0.090854

Mole fractions always add up to 1.

Mole fraction of solvent
0.909146
Mole percent of solute
9.0854 %
Moles of solute
0.9985 mol
Moles of solvent
9.99167 mol
Total moles
10.99018 mol

About the Mole Fraction Calculator

Mole fraction of solute and solvent in a two-component mixture, with mole percent.

Also known as: mole percent, chi calculator, mole fraction formula, raoults law.

How to use this calculator

  1. Enter solute formula, mass of solute, solvent formula, mass of solvent.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

χ₁ = n₁ / (n₁ + n₂)

Worked example

Using the values pre-filled in the calculator above:

  • Solute formula: C2H6O
  • Mass of solute = 46 g
  • Solvent formula: H2O
  • Mass of solvent = 180 g

the calculator returns:

  • Mole fraction of solute: 0.090854
  • Mole fraction of solvent: 0.909146
  • Mole percent of solute: 9.0854 %
  • Moles of solute: 0.9985 mol