And we're told that the vapor pressure of pure water is 500 millimeter D.
And what that basically says is the pressure exerted by these molecules, the gas molecules is is 500. What we want to do is we want to mix these two containers and then find the bigger pressure of water. So we want to mix them and find the pressure exerted by these water molecules on the walls of the container. The first step is to find the moles of water. The second step is to find the moles of ethylene glycol. And the third step is to use the formula to find vapor pressure.