Question

question 4 why is the vapor pressure of a solution lower than that of a pure solvent? the solution has a higher density than the pure solvent. the solution has a lower number of solvent molecules evaporating. dissolution lowers the temperature of the solution. the solution has a lower number of solvent molecules overall.

Explanation:

Vapor pressure is a colligative property. In a solution, the presence of solute particles reduces the number of solvent molecules at the surface available to evaporate. This lowers the vapor - pressure of the solution compared to the pure solvent.

Answer:

The solution has a lower number of solvent molecules evaporating.