mole fraction (X)

 

itz moles of d elemnt divided by total no of moles

likes if there r 4 moles of Oxygen and 6moles of hydrogen (just an xample)

 

so mole fraction of oxygen is 4/(10)

here  10=total no of moles

 

always X(oxygen)+X(hydrogen)=1

sum of mole fractions of all d elemts present=1