Mole Fraction Calculator

Find the mole fraction of a component.

Mole fraction of A 0.2

Mole percent (%) 20

Formula: xA = moles A ÷ total moles

Step-by-step with your numbers:

1. Values used:

2. Moles of component A = 2 mol

3. Moles of everything else = 8 mol

5. Mole fraction of A = 0.2

6. Mole percent = 20%

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The fraction of total moles made up by one component.

The math behind it

mole fraction xA = moles of A ÷ total moles. All fractions sum to 1.

2 mol A with 8 mol others → 0.2.

Use?

Raoult's law, partial pressures and colligative properties.