How to use the mole fraction calculator
Compute mole fraction in a binary mixture. Enter moles of component 1, moles of component 2 in the fields above; the mole fraction 1, mole fraction 2 are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- n1 — Moles of component 1 (mol)
- n2 — Moles of component 2 (mol)
Worked example
With moles of component 1 = 2 mol, moles of component 2 = 8 mol, the calculator gives mole fraction 1 ≈ 0.2; mole fraction 2 ≈ 0.8.
Frequently asked questions
What is the formula for the mole fraction calculation?
Mole fraction 1 = n1 / (n1+n2). Mole fraction 2 = n2 / (n1+n2). Here n1 is moles of component 1 (mol), n2 is moles of component 2 (mol).
What inputs do I need for the mole fraction calculator?
You need moles of component 1 in mol, moles of component 2 in mol. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.