1. The problem statement, all variables and given/known data I'm trying to calculate the air pressure from some data that I have. #1. Calculate the cylinder pressure. (barometric pressure=765 mmHg, h=35mm) #2. Calculate the moles of air using low temperature and volume and cylinder pressure above. (Low temp=50.0deg Celsius, vol=4.0mL, R=62.36) #3. Calculate the air pressure using the high temperature reading from data. (High temp = 80deg Celsius) 2. Relevant equations Ideal Gas Law PV=nRT 3. The attempt at a solution I have converted the temps to Kelvin and the mL to L. I have also made a -0.2 mL correction to my volume. Question #1= 768 mm Hg Question #2 = 1.448×10-4 mol air Question #3 = The question doesn't say to use the volume for that high temp, so I use it anyways. Another classmate got 420 mm Hg. But I don't get that. I get 480+ mm Hg. Should I use the volume from question #2 since #3 doesn't specify? The data that was collected is the same as my classmates but I don't know where I am making my mistake!! I would appreciate any assistance with this!!