Ok now the problem I have here is that the teacher says to always convert C to kelvin (i think thats it). And the formula for that is "C° + 273.15". So well uhhh I dunno what my problem is but I have a feeling I didnt do this right. I got V = .53247 liters. Is that right? What I did was multiplied 295.15 (which is 22° C in kelvin) by 0.5 liters. I got 147.575. So I divided 147.575 by 277.15 (which is 4° C in kelvin) which got me .53247 liters. Please help cause I just gotta know how to do this so I can do the other 20 or so problems.