use the chemical reaction to answer the question

Question

CaCO3 -> CO2 +CaO

a scientist heats 30 grams of calcium carbonate in the chemical reaction shown. what is the total mass of the products?

Answer 1

In the chemical reaction

\[ \text{CaCO}_3 \rightarrow \text{CO}_2 + \text{CaO} \]

the reactant is calcium carbonate (CaCO₃), and it decomposes into carbon dioxide (CO₂) and calcium oxide (CaO).

According to the law of conservation of mass, the total mass of the reactants must be equal to the total mass of the products.

If a scientist starts with 30 grams of calcium carbonate (CaCO₃), then the total mass of the products (CO₂ and CaO) would also be 30 grams after the reaction takes place.

Therefore, the total mass of the products is 30 grams.