Question

what is mole fraction

Answer 1

the ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Answer 2

here is the answer hope it works
In chemistry, the mole fraction or molar fraction (xi) is defined as the amount of a constituent (expressed in moles), ni, divided by the total amount of all constituents in a mixture (also expressed in moles), ntot:[1]

{\displaystyle x_{i}={\frac {n_{i}}{n_{\mathrm {tot} }}}}

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

{\displaystyle \sum _{i=1}^{N}n_{i}=n_{\mathrm {tot} };\;\sum _{i=1}^{N}x_{i}=1}

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

The mole fraction is also called the amount fraction.[1] It is identical to the number fraction, which is defined as the number of molecules of a constituent Ni divided by the total number of all molecules Ntot. The mole fraction is sometimes denoted by the lowercase Greek letter χ (chi) instead of a Roman x.[2][3] For mixtures of gases, IUPACrecommends the letter y.[1]