Question

when heated, calcium carbonate goes through a chemical reaction, and produces dioxide gas. a chemist performed this reaction in a lab and found that the mass of the mass of the calcium carbonate. what is the reason behind this decrease in mass? a. carbon dioxide is produced, and as a gas, it was not captured to measure b. calcium oxide crystals produced break up at room temperature, leading c. the carbon dioxide molecules produced were unstable and lighter in mass d. the calcium oxide crystals produced were unstable and lighter in mass.

Explanation:

When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide gas. According to the law of conservation of mass, the total mass of reactants equals the total mass of products. But since carbon dioxide is a gas and escapes into the atmosphere during the reaction in the lab, the measured mass of the remaining substances is less than the initial mass of calcium carbonate.

Answer:

A. Carbon dioxide is produced, and as a gas, it was not captured to measure.