I need a hand with this one: Having this equation:
Na2SO4 +BaCl2 = BaSO4+NaCl
If 10.09 grams of Na2SO4 were added to a 50mL barium solution and reacted completely, what was the BaCl2 molarity of the solution?

Thx

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.