We blow up a balloon from 5 Liters to 10 Liters and tie it off. Then we pass out from lack of oxygen. The balloon initially had 18 mol of CO2, how many moles of CO2 are in the balloon at the end? It is not 9!

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.