Question

if the mole fraction of a solute is 0.25,then the mole fraction of the solvent will be what?

Answer 1

Let Xa and Xb be the mole fraction of solute and solvent respectively.
Sum of mole fraction of solute and solvent is always 1.
So, Xa + Xb = 1
=>Xb = 1 - Xa
=>Xb = 1 - 0.25
=>Xb = 0.75.

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Answer 2

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☆ Molality (m) is defined as the number of moles of solute per kilogram of solvent.

☆ Molarity is a measurement of the moles in the total volume of the solution, whereas molality is a measurement of the moles in relationship to the mass of the solvent.