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Mole Fraction

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What is Mole Fraction?

Mole fraction (χ) is the ratio of the number of moles of one component to the total number of moles of all components in a mixture. Mole fractions are dimensionless and sum to 1 for all components in a mixture. They are used in Raoult's law calculations for vapour pressure, and to express the composition of gas mixtures. Mole fraction is unaffected by temperature or pressure changes.

Key Facts

Term Mole Fraction
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Frequently Asked Questions

Mole fraction (χ) is the ratio of the number of moles of one component to the total number of moles of all components in a mixture. Mole fractions are dimensionless and sum to 1 for all components in a mixture. They are used in Raoult's law calculations for vapour pressure, and to express the composition of gas mixtures. Mole fraction is unaffected by temperature or pressure changes.

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