Question

question 3 what role does a non - volatile solute play in the vapor pressure of a solution? it increases the vapor pressure. it decreases the vapor pressure. it has no effect on vapor pressure.

Explanation:

According to Raoult's law, the presence of a non - volatile solute in a solution lowers the vapor pressure of the solution. Non - volatile solutes reduce the number of solvent molecules at the surface capable of vaporizing, thus decreasing the vapor pressure.

Answer:

It decreases the vapor pressure.