Uploaded May 2025 | Updated September 2026, 1 week ago

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Lavoisier’s law of conservation of mass showed that matter is never created nor destroyed in chemical reactions. This video breaks down the experiments, logic, and why this principle still anchors modern chemistry exams.

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0:00 Mass is constant during any chemical reaction
0:26 Example Reaction: Decomposition of CaCO3
1:17 Mass of a gas? Check your intuition!
2:40 What does this mean for atomic structure?
3:08 Historically-Plausible Atomic Structures

Images:
Photo by Scott Webb: pexels.com/photo/photography-of-stones-1029604
en.wikipedia.org/wiki/File:Liebig_Company_Trading_Card_Ad_01.12.004_front.tif

Citations:
Paula Yurkanis Bruice, "Organic Chemistry" 8th ed
openstax.org/details/books/organic-chemistry
openstax.org/details/books/chemistry-2e