Analyze gas mixtures with instant fractions and outputs. Review formulas, examples, charts, and downloadable reports. Built for students, labs, classrooms, and accurate practice sessions.
Enter total pressure, choose a unit, then add component names and moles. Empty rows are ignored.
1. Total moles: \( n_{total} = n_1 + n_2 + n_3 + \dots + n_i \)
2. Mole fraction: \( x_i = \frac{n_i}{n_{total}} \)
3. Partial pressure: \( P_i = x_i \times P_{total} \)
4. Dalton's law: \( P_{total} = P_1 + P_2 + P_3 + \dots + P_i \)
The calculator first finds total moles. It then divides each component moles by total moles to get mole fraction. Finally, it multiplies each mole fraction by total pressure to get partial pressure.
Sample mixture using total pressure of 2.50 atm.
| Gas | Moles | Mole Fraction | Partial Pressure (atm) |
|---|---|---|---|
| Nitrogen | 1.20 | 0.4800 | 1.2000 |
| Oxygen | 0.80 | 0.3200 | 0.8000 |
| Carbon Dioxide | 0.50 | 0.2000 | 0.5000 |
| Total | 2.50 | 1.0000 | 2.5000 |
Mole fraction shows the share of one gas in a mixture. It equals the component moles divided by total mixture moles. All mole fractions together add to one.
Partial pressure is the pressure contributed by one gas inside a mixture. Under Dalton's law, each gas behaves as if it alone occupied the container at the same temperature.
Yes. This calculator accepts atm, kPa, bar, mmHg, and psi. It converts total pressure internally, then returns partial pressures in your selected unit and also in atm.
No. Empty rows are ignored. Only rows with positive mole values are included in the calculation. This keeps the form flexible for small or larger mixtures.
Because each mole fraction is a part of the same whole mixture. When every component amount is divided by the same total moles, the fractions add to one.
Dalton's law works best for ideal gases and many low pressure mixtures. Real gases can deviate when pressure rises or intermolecular forces become more significant.
Yes. Use the CSV button for spreadsheets or the PDF button for printable summaries. Both options use the result table generated after calculation.
The most common issues are missing pressure, negative mole values, or leaving every mole input blank. Enter at least one positive component and a valid total pressure.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.