Answer to Question #239511 in Chemistry for alex

Question

When heated, KClO3 decomposes into KCl and O2.

2KClO3⟶2KCl+3O2

If this reaction produced 23.0 g KCl, how many grams of O2 were produced?

Answer 1

Solution:

The molar mass of KCl is 74.55 g/mol

The molar mass of O₂ is 32.00 g/mol

Balanced chemical equation:

2KClO₃ ⟶ 2KCl + 3O₂

According to stoichiometry:

(23.0 g KCl) × (1 mol KCl / 74.55 g KCl) × (3 mol O₂ / 2 mol KCl) × (32.00 g O₂ / 1 mol O₂) = 14.8 g O₂

Answer: 14.8 grams of O₂ were produced.