Consider a sample of gas that occupies 904 mL at a pressure of 681.5 torr and a temperature of 30.82 °C. If the pressure changes to 0.801 atm and the volume changes to 0.775 L, what is the gas' new temperature in °C?
PV/T remains constant, so you want T such that
(0.801)(775)/T = (0.896)(904)/(30.82+273.15)