A solution is prepared by adding 5g of a substance X to 18g of water. Calculate the mass percent of solute .

Explanation

Mole fraction is defined as the ratio of the number of moles of one component to the total number of moles of all the components present in the solution.
For a binary solution made up of two components A and B.
Mole fraction of A `(x_(A))=n_(A)/(N_(A)+n_(B))`
Mole fraction of B `(x_(B))=n_(B)/(n_(A)+n_(B))`
Sum of mole fraction `(x_(A)+x_(B))=n_(A)/(n_(A)+n_(B))+n_(B)/(n_(A)+n_(B))=1`