My teacher is ridiculous. We didn't learn anything about boiling points or Van Hoft factors or whatever. The problem are in the attachments. From the description i can only predict the equation as S8 + AgF -> SF2 + Ag I'm not even sure if it is right or not I have trouble on the second equation. As well using pv= nRT, 20 kpa * (mass of SF2)/.083 g/L = n*8.314*305 If i have the mass of the Gas i might be able to figure out the moles of the I can't even figure out the second equation so even with the given information i cannot proceed with this problem. In fact i'm not even sure if i'm starting the problem right or not. I don't even know the transformed structure of the gas either.... Please help. I really need this. thanks in advance.