Final answer:
To calculate the vapor pressure of the solution, you can use Raoult's law. First, calculate the number of moles of ethylene glycol and water present in the solution.
Step-by-step explanation:
A 30.2% solution of ethylene glycol contains 302 g of ethylene glycol per kilogram of solution; the remainder (698 g) is water. To use Raoult's law to calculate the vapor pressure of the solution, we must know the mole fraction of water. Thus we must first calculate the number of moles of both ethylene glycol (EG) and water present: