Answer :
Final answer:
Mole fraction is essential for calculating vapor pressure lowering by determining the moles of a component relative to the total moles in a solution.
Explanation:
Mole fraction is the concentration unit necessary for the calculation of vapor pressure lowering. It represents the ratio of the moles of one component to the total moles of all components in the solution.
For example, when calculating the vapor pressure lowering in a solution, knowing the mole fractions of the solute and solvent is crucial in determining the extent of the vapor pressure reduction.
Understanding mole fractions helps predict changes in vapor pressure and other colligative properties based on the solute-solvent interactions in a solution.
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