Question

Which types of changes must follow the law of conservation of mass?

Both physical and chemical changes
Neither physical nor chemical changes
Only physical changes
Only chemical changes

Answer 1

Answer:

Both physical and chemical changes

Answer 2

Answer:

Both physical and chemical changes follow the law since when the system is closed to all transfers of matter and energy, the mass of the system must remain constant over time, irrespective of the state.

Explanation:

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