g An alkyne with molecular formula C5H8 is treated with excess HBr, and two different products are obtained, each of which has molecular formula C5H10Br2. Identify the starting alkyne.

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.