In which group of the periodic table do most of the elements exhibit both positive and negative oxidation states?
a. 17
b. 2
c. 12
d. 7

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.