Given the balanced equation representing a reaction:
2KClO3 + energy→2KCl + 3O2
What is the mass of KCl produced when 24.51 grams of KClO3 reacts completely to produce 9.60 grams of O2?
(1) 5.31 g
(2) 14.91 g
(3) 34.11 g
(4) 43.71 g
Solution: According to the conservation of mass, mass of the reactants must be equal to the mass of products. We have all the masses except for KCl. Let's plug and chug: 24.51g = 9.60g + x
x = 14.91 g answer choice 2 is correct