hen heated, KClO3 decomposes into KCl and O2. 2KClO3⟶2KCl+3O2 If this reaction produced 34.8 g KCl, how many grams of O2 were produced?

Answer 1

KClO3(s) ===> 2KCl(s) + 3O2(g) ... balanced equation for decomposition of KClO3

Using dimensional analysis and the stoichiometry of the balanced equation, we answer the question as follows

34.8 g KCl x 1 mol KCl / 74.6 g x 3 mol O₂ / 2 mol KCl x 32 g O₂ / mol O₂ = 22.4 g O₂