conservation of mass (summer exam)

Question 1

The law of conservation states:
Atoms are not lost or gained in a chemical reaction.
This means the mass of reactants = mass of products

Answer 1

MESMERISE LIKE FR FR LOKI

Question 2

Work out: Potassium carbonate decomposes in a conical flask to form 60g of potassium oxide and 30g of carbon dioxide. What mass of potassium carbonate was used in this reaction?

Answer 2

potassium carbonate 🡪 potassium oxide + carbon dioxide
? 60g 30g
Mass of reactants = mass of products
Mass of potassium carbonate = 60g + 30g = 90g