Question

2. Law of Conservation of Mass
The Law of Conservation of Mass states that matter is neither __________ nor __________ in a
chemical reaction.
This means:
• Total mass of reactants = total mass of products
If something appears to lose mass, it is often because __________ escaped into the air.
Example: When wood burns, ash is left behind, but gases like __________ and __________ are
released.

Answer 1

2. Law of Conservation of Mass
The Law of Conservation of Mass states that matter is neither created nor destroyed in a chemical reaction.
This means:
• Total mass of reactants = total mass of products
If something appears to lose mass, it is often because gas (or vapor) escaped into the air.
Example: When wood burns, ash is left behind, but gases like carbon dioxide and water vapor are released.