You have to use the ideal gas law of PV=nRT. In this case, you just have to plug in the given variables. P (pressure) = 4.68 atm V (volume) = 4.95 L n (number of moles) = 16.45 R (gas constant) = .0821 T (temperature) is what youre trying to solve so:
(4.68)*(4.95) = (16.45)*(.0821)*T To get T by itself, divide both sides by (16.45)*(0.821) to get T of 17.15.
