Mondo Knows Facts
Lavoisier showed that mass is conserved
Weighing sealed reactions proved that nothing vanishes in combustion Careful weighing convinced Antoine Lavoisier that the total mass of reactants equals the mass of products once gases are included. He also identified oxygen's role in burning and helped name the element. His work replaced phlogiston theory, which had treated fire as a substance. It sits in Mondo's science collection, one of 200 facts that each trace back to the reference below.
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Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.
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Lavoisier showed that mass is conserved: the short answers
- Where does this come from, and can I check it?
- Weighing sealed reactions proved that nothing vanishes in combustion. The figure is taken from American Chemical Society, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a science fact?
- Yes. It sits on the Science shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.