- Mole basis: M = Σ yi·Mi. Mass basis: M = 1 / Σ (wi / Mi).
- For gases, volume % is the same as mole % (ideal gas behavior).
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Gas Mixture Molar Mass
Enter a gas composition to get its average molar mass (molecular weight).
Composition basis
Composition (mole %)
Percentages are normalized if they don't add to 100
Mixture molar mass =