ThetaSigma87

Im doing a lab, trying to find the molar volume of a gas. I'm stuck on a step that is asking for the vapor pressure of water. This is all the data I have collected for two separate trials. -Mass of Magnesium: T1:45g T2:46g -Volume of Gas Mixture: T1:48mL T2:50mL -Atmospheric Pressure: T1:750.81torr T2:749.554torr -Water Bath Temperature: T1:20C T2:18C Vapor Pressure of Water: T1:? T2:? I know you can't give me the answer, I just need to know what to do to find the vapor pressure. I am completely lost on this and I feel like it is incredibly simple.