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mole fraction

American  

noun

Chemistry.

  1. the ratio of the number of moles of a given component of a mixture to the total number of moles of all the components.

Etymology

Origin of mole fraction

First recorded in 1920–25

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The numerator for this solution’s mole fraction is, therefore, 3.0 mol NaCl.

From Textbooks • Feb. 14, 2019

Calculate the mole fraction of methanol and of ethanol in a solution of 50.0 g of methanol and 50.0 g of ethanol.

From Textbooks • Feb. 14, 2019

Here is another example of this concept, but dealing with mole fraction calculations.

From Textbooks • Feb. 14, 2019

The mole fraction, X, of a component is the ratio of its molar amount to the total number of moles of all solution components:

From Textbooks • Feb. 14, 2019

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.