Question

Which changes to matter are described by the law of conservation of mass? (1 point) Responses All physical and chemical changes, including changes that involve gases All physical and chemical changes, including 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 Most changes, but not chemical 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 is neither created nor destroyed in a chemical reaction, which applies to both physical and chemical changes. This means that during these changes, the total mass of the substances involved remains constant, even if the substances themselves change form or composition.