Question

Use the chemical reaction to answer the question.
CaCO3 → CO2 + CaO
A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. What is the total mass of the products?
(1 point)
• 10 grams
• 60 grams
• 30 grams
• 15 grams

Answer 1

In a chemical reaction, the law of conservation of mass states that mass cannot be created or destroyed. This means that the total mass of the reactants must equal the total mass of the products.

In this case, the initial mass of calcium carbonate (CaCO3) is 30 grams. When it decomposes into carbon dioxide (CO2) and calcium oxide (CaO), the total mass of the products (CO2 and CaO) will also be 30 grams.

Therefore, the total mass of the products is:

**30 grams**.