Chemical Reactions Quick Check

Question

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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)
Responses

15 grams
15 grams

10 grams
10 grams

60 grams
60 grams

30 grams

Answer 1

In a chemical reaction, the law of conservation of mass states that mass is neither created nor destroyed; it simply changes forms. This means that the total mass of the reactants must equal the total mass of the products.

In the given reaction:

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

If the scientist heats 30 grams of calcium carbonate (CaCO3), the total mass of the products (CO2 and CaO) will also be 30 grams.

Therefore, the correct response is:

30 grams