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The Law of Conservation of Mass was proposed in:

A1897
B1932
C1789
D1808
Answer & Solution
Correct answer: C. 1789
1. Lavoisier worked in France in the eighteenth century. 2. His law came before Dalton's atomic theory. 3. He proposed it in 1789. 4. So the answer is 1789. _Source: syllabus Science, Ch 9 'Atomic Foundations of Matter'_
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