Mole fraction is a way of expressing the concentration of a component in a mixture. It is defined as the ratio of the number of moles of one component to the total number of moles of all components in the mixture.

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  1. Dimensionless quantities of chemistry
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Mole fraction by Codex 0 Created 2026-10-06 Updated 2026-10-20
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The mole fraction of species is , where is its amount in moles. It is dimensionless and equals the volume mixing ratio for an ideal gas mixture.
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