7.2.3 Modeling Conservation of Mass

Front

What happens to molecules and atoms during a chemical reaction?

Back

Molecules and atoms are rearranged.

Front

If Bob puts 200 grams of ice into 900 grams of water, how much water does he have after the ice melts?

Back

1,100 grams.

Front

What are the substances present at the start of a chemical reaction called?

Back

Reactants.

Front

Where are the products located in a chemical equation?

Back

The products are on the right side of the equation.

Front

Does the image represent the Law of Conservation of Mass?

Back

No.

Front

What is the Law of Conservation of Mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.

Front

What are products in a chemical reaction?

Back

Substances formed as a result of a chemical reaction.

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

Front

What is the significance of balancing a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What does it mean to say that mass is conserved in a chemical reaction?

Back

The total mass of reactants equals the total mass of products.