Law of Conservation of Mass

Front

What is the Law of Conservation of Mass?

Back

Mass is never created or destroyed.

Front

How many atoms do you have in the compound 2MgCl2?

Back

6 atoms.

Front

Matter cannot be created nor destroyed; it can only be...

Back

Transformed or changed.

Front

Does the equation H2 + O2 → H2O follow the Law of Conservation of Mass?

Back

No, because there are more atoms in the reactant.

Front

Which of these is not a chemical reaction?

Back

Melting of ice.

Front

What does the Law of Conservation of Mass imply about chemical reactions?

Back

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

Front

What happens to atoms during a chemical reaction?

Back

Atoms are rearranged to form new substances.

Front

Can mass be created during a physical change?

Back

No, mass cannot be created or destroyed in any change.

Front

What is an example of a chemical reaction?

Back

Burning of wood.

Front

What is an example of a physical change?

Back

Melting of ice.