How many moles of hydroxide are in 68 grams of copper (II) hydroxide?

How many atoms are there in 5.70 mol of mg

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

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.