Mole fraction

In chemistry, the mole fraction or molar fraction ( $x_i$ ) is defined as the amount of a constituent (expressed in moles), $n_i$ , divided by the total amount of all constituents in a mixture, $n_{tot}$ :

The sum of all the mole fractions is equal to 1:

The same concept expressed with a denominator of 100 is the mole percent or molar percentage or molar proportion (mol%).

单词	Molar fraction
释义	Molar fraction 英语百科 Mole fraction In chemistry, the mole fraction or molar fraction ( $x_i$ ) is defined as the amount of a constituent (expressed in moles), $n_i$ , divided by the total amount of all constituents in a mixture, $n_{tot}$ : The sum of all the mole fractions is equal to 1: The same concept expressed with a denominator of 100 is the mole percent or molar percentage or molar proportion (mol%).
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Molar fraction

Mole fraction