A helium filled balloon has a volume of 208 l and it contains 9.95 moles of gas. if the pressure of the balloon is 1.26 atm determine the temperature

To determine the temperature of the gas, we need to assume ideal gas to use the equation PV=nRT where P represents the pressure, V is the volume, n is the number of moles, T is the temperature and R is the universal gas constant. We calculate as follows:

PV = nRT

T = PV / nR

T = (1.26 atm) (208 L) / 0.08205 L-atm/mol-K (9.95 mol)

T = 321.02 K

Hope this answers the question.