If the mole fraction of acetone in water is 0.2 then the mass percentage (w/w) of acetone in the solution will be (Molar mass of acetone = 58 g mol−1)
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Mole fraction of solute=
Total number of moles of all the solvent
Moles of solute
X_{A}= \frac{mol A}{mol A + mol B}X
A
=
molA+molB
molA
And
X_{B}= \frac{mol B}{mol A + mol B}X
B
= molA+molB
molB
Note:
1. In the given mixture, sum of all the mole fractions is equal to one.
XA + XB = 1
2. The multiplication of the mole fraction by 100 gives the mole percentage.
3. Mole fraction is a unitless and dimensionless expression
Explanation:
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