At 25 degrees Celsius, methanol has a vapor pressure of 95mmHg, and toluene has a vapor pressure of 300mmHg.

What is the vapor pressure of a solution that is 30% methanol and 70% toluene?

Assume that the solution is ideal.

The vapor pressure of water at 25 degrees Celsius is 22.8mmHg. If three moles of a nonvolatile solute are added to twelve moles of water, what is the new vapor pressure of the solution?