The Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

Mass is never created or destroyed in a chemical reaction.

Front

If a reaction starts with 20g of reactants, how much mass should the products have?

Back

20g of products.

Front

What happens to matter in a chemical reaction according to the Law of Conservation of Mass?

Back

Matter can only be transformed or changed, not created or destroyed.

Front

Back

22 H atoms.

Front

How does a balanced chemical equation relate to the Law of Conservation of Mass?

Back

The total amount of matter stays the same during a chemical reaction.

Front

What does it mean when we say matter is 'transformed' in a chemical reaction?

Back

It means that the matter changes form but the total mass remains constant.

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 where mass is conserved?

Back

Melting ice into water; the mass remains the same.

Front

What is an example of a chemical reaction that demonstrates the Law of Conservation of Mass?

Back

Burning wood; the mass of the ash and gases equals the mass of the original wood.