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Atoms and Molecules

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Multiple Choice

Samples of water have been sourced from a river, a tap and a rainwater harvesting tank. However, upon testing, all the samples contain hydrogen and oxygen in the ratio of 1 : 8 by mass irrespective of the source of water. Which of the following laws does this prove?

  1. Law of conservation of mass
  2. Law of multiple proportions
  3. Law of definite proportions
  4. Law of atomic theory of matter
  5. None of these
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