3. Hydrogen bonds involve "attractions between weaker + and - charges." Looking at Figure 3 on page 9, would you say that hydrogen bonds are based on ionic, polar covalent, or nonpolar
covalent bonds? Explain your choice.

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.