Question

If a substance X dissolves in substance Y and their no.of moles are nx and ny respectively,then the mole fraction of x is given by

Answer 1

mole fraction will be  $\frac{x}{x+y}$

Explanation:

mole fraction of a =  $\frac{moles of substance a }{total moles in the solution}$

mole fraction of a = $\frac{nx}{nx+ny}$

or

                                 =  $\frac{x}{x+y}$