A solution contains equal amounts (in moles) of liquid components A and B. The vapor pressure of

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A solution contains equal amounts (in moles) of liquid components A and B. The vapor pressure of pure A is 100 mmHg and that of pure B is 200 mmHg. The experimentally measured vapor pressure of the solution is 120 mmHg.

What are the relative strengths of the solute–solute, solute–solvent, and solvent–solvent interactions in this solution?

(a) Solute–solvent interactions > solute–solute and solvent–solvent interactions 

(b) Solute–solvent interactions = solute–solute and solvent–solvent interactions 

(c) Solute–solute and solvent–solvent interactions > solute–solvent interactions

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