Law of Conservation of Mass/Energy

Front

What is the Law of Conservation of Mass?

Back

Mass is never created or destroyed in a chemical reaction.

Front

What happens to matter during a chemical reaction?

Back

Matter can only be transformed or changed; it cannot be created or destroyed.

Front

If a chemical reaction starts with 20g of reactants, what will be the total mass of the products?

Back

The total mass of the products will be 20g.

Front

What is the relationship between the mass of reactants and products in a chemical reaction?

Back

The mass of the reactants is equal to the mass of the products.

Front

Can mass be created in a chemical reaction?

Back

No, mass cannot be created in a chemical reaction.

Front

Can mass be destroyed in a chemical reaction?

Back

No, mass cannot be destroyed in a chemical reaction.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What happens to the total mass of a closed system during a chemical reaction?

Back

The total mass remains constant.

Front

What is an important principle of the Law of Conservation of Energy?

Back

Energy cannot be created or destroyed, only transformed.