Answer to Question #258047 in Chemistry for Mahnoor

Question

How many grams of oxygen can be produced from the decomposition of 100g of KClO3?

Answer 1

Solution:

The molar mass of KClO₃ is 122.55 g/mol

The molar mass of O₂ is 32.00 g/ mol

Balanced chemical equation:

2KClO₃ → 2KCl(s) + 3O₂(g)

According to stoichiometry:

3 × Moles of KClO₃ = 2 × Moles of O₂

Using the mole ration, calculate the mass of oxygen (O₂):

(100 g KClO₃) × (1 mol KClO₃ / 122.55 g KClO₃) × (3 mol O₂ / 2 mol KClO₃) × (32.00 g O₂ / 1 mol O₂) = 39.168 g O₂ = 39.2 g O₂

Answer: 39.2 grams of oxygen (O₂) can be produced.