You will get 13 points if you help me with this :) ^^

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

What volume would 2.25 moles of ne has occupy at stp?

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.