Question

define Mole fraction

Answer 1

Mole fraction is a unit of concentration, defined to be equal to the number of moles of a component divided by the total number of molesof a solution. Because it is a ratio,mole fraction is a unitless expression. The mole fraction of all components of a solution, when added together, will equal 1.

Answer 2

Mole fraction is a unit of concentration, defined to be equal to the number of moles of a component divided by the total number of moles of a solution. Because it is a ratio, mole fraction is a unitless expression. Themole fraction of all components of a solution, when added together, will equal 1.
may  this help you 
mark as brillint if u like