Question

Which changes to matter are described by the law of conservation of mass? (1 point) Responses Most changes, but not chemical changes that involve gases. Most changes, but not chemical changes that involve gases. Only chemical changes, not physical changes Only chemical changes, not physical changes Only physical changes, not chemical changes Only physical changes, not chemical changes All physical and chemical changes, including changes that involve gases

Answer 1

The correct response is: **All physical and chemical changes, including changes that involve gases**.

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction, so the total mass of reactants must equal the total mass of products, regardless of whether the changes are physical or chemical.