What is the mass in grams of oxygen gas that can be produced from 0.515 grams of carbon dioxide?

Question

4 KO₂ (s) + 2 CO₂(g) → 2 K₂CO₃(s) + 3 O₂(g)

Answer 1

The stoichiometry: (0.515g CO₂) * (1 mol CO₂ / 44.0g CO₂) * (3 mol O₂ /2 mol CO₂) * (32.0g O₂ /1 mol O₂) = 0.562g O₂ gas.