Given the balanced equation representing a reaction:
CaO(s) + CO2(g) ==>CaCO3(s) + heat
What is the total mass of CaO(s) that reacts completely with 88 grams of CO2(g) to produce 200. grams of CaCO3(s)?
(1) 56 g (3) 112 g
(2) 88 g (4) 288 g
The answer is (3) 112 g. The question gives the balanced reaction and specific that 88 grams of CO2 has completely reacted and produces 200 grams of CaCO3. So the mass of CaO equals 200-88=112 g.
