Mass fraction

 Mass fraction 

It is defined as the mass of the given component per unit mass of the . If Xa and Xb denoted the mass fractions of the two components A and B respectively when wA g of one component A is mixed with wB g of the second component B in a binary solution, then 

                             xA = wA /wA +wB         and       xb = wB /wA + wB

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