How can I calculate the vapor pressure of a solution?
Vapor pressure is the measure of gas pressure exerted above a liquid in a closed system.
Strong intermolecular forces produce a lower rate of evaporation and vapor pressure while weak intermolecular forces produces a higher rate of evaporation and vapor pressure.
Vapor pressure increases as temperature increases.
As for calculating, I don't think there's an actual way for calculating vapor pressure. It varies with each liquid and your textbook or teacher might have given you a specific list that they want you to remember.