What principle states that in a closed system, the total mass remains constant, despite physical or chemical changes?

Category: Science · Difficulty: hard

Hint: It’s fundamental to chemical reactions.

Answer

Conservation of mass

Explanation

The conservation of mass states that mass cannot be created or destroyed in a chemical reaction, only transformed.

This is a hard science riddle — a tricky one that takes a little thought. The answer is Conservation of mass.

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