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 30 grams Skip to navigation page 17 of 17

Answer 1

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

In the reaction you provided:

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

When 30 grams of calcium carbonate (\( \text{CaCO}_3 \)) is heated, the total mass of the products (carbon dioxide (\( \text{CO}_2 \)) and calcium oxide (\( \text{CaO} \))) will also be 30 grams.

Thus, the answer is:

30 grams.

Answer 2

Use the chemical reaction to answer the question. 4​Fe+3O2→2Fe2O3​ What happens to atoms of Fe and O2 during the reaction? (1 point) Responses They gain mass. They gain mass. They maintain their properties. They maintain their properties. They are rearranged. They are rearranged. They are lost. They are lost. Skip to navigation page 17 of 17

Answer 3

In the chemical reaction

\[ 4 \text{Fe} + 3 \text{O}_2 \rightarrow 2 \text{Fe}_2\text{O}_3, \]

the atoms of iron (Fe) and oxygen (O2) undergo a transformation. According to the law of conservation of mass, the atoms are not created or destroyed but are instead rearranged to form new substances.

Therefore, the correct response to what happens to the atoms of Fe and O2 during the reaction is:

They are rearranged.

Answer 4

hich is most likely to occur during a chemical reaction?(1 point) Responses New atoms are created. New atoms are created. The original substance maintains its properties. The original substance maintains its properties. Atoms of the original substance are lost. Atoms of the original substance are lost. Mass is conserved.

Answer 5

During a chemical reaction, the following principle holds true according to the law of conservation of mass:

• Mass is conserved.

This means that the total mass of the reactants is equal to the total mass of the products, and no new atoms are created or destroyed. Instead, the atoms are rearranged to form new substances, and the original substances do not maintain their properties after the reaction.

Therefore, the correct response is:

Mass is conserved.

Answer 6

Use the chemical reaction to answer the question. NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2 A student mixes baking soda (NaHCO3 ) and acetic acid (HC2H3O2 ) to produce a chemical reaction shown. Which statement about the reaction is correct? (1 point) Responses There are more H atoms after the reaction. There are more H atoms after the reaction. Some atoms gain mass after the reaction. Some atoms gain mass after the reaction. Atoms of Na are destroyed during the reaction. Atoms of Na are destroyed during the reaction. The atoms of the reactants are regrouped during the reaction. The atoms of the reactants are regrouped during the reaction. Skip to navigation

Answer 7

In the chemical reaction

\[ \text{NaHCO}_3 + \text{HC}_2\text{H}_3\text{O}_2 \rightarrow \text{NaC}_2\text{H}_3\text{O}_2 + \text{H}_2\text{O} + \text{CO}_2, \]

the atoms present in the reactants are rearranged to form the products. According to the law of conservation of mass, no atoms are lost or created; they are simply reorganized.

Given the provided options, the correct statement about the reaction is:

The atoms of the reactants are regrouped during the reaction.