Chemical Combination Laws and Atomic Theory
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Chemical Combination Laws and Atomic Theory

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Questions and Answers

What principle did Antoine Lavoisier establish through his experiment with heating mercury?

  • Principle of conservation of mass (correct)
  • Principle of atomic structure
  • Principle of mass-energy equivalence
  • Principle of definite proportions

    • Why did Antoine Lavoisier use an analytical balance in his experiment with mercury?

  • To determine reaction speed
  • To measure temperature
  • For high accuracy in measurements (correct)
  • To observe color changes

    • What was the identity of the gas that Lavoisier produced in his experiment with mercury oxide?

  • Oxygen (correct)
  • Carbon dioxide
  • Nitrogen
  • Hydrogen

    • Why did Joseph Proust disagree with Claude Berthollet's belief regarding fixed proportions in compounds?

    <p>Impurities and experimental errors can cause apparent variations</p> Signup and view all the answers

    What important scientific law did Joseph Proust propose based on his experiments with compounds?

    <p>Law of definite proportions</p> Signup and view all the answers

    What did the development of the law of definite proportions demonstrate about science according to the text?

    <p>How science progresses</p> Signup and view all the answers

    What did the studies about heat and combustion during the 18th century help to formulate?

    <p>The laws of chemical combination</p> Signup and view all the answers

    What was observed when an organic material was burned?

    <p>A solid residue such as ash was left</p> Signup and view all the answers

    What was the formation of 'calx', which is now called oxide, observed when?

    <p>When metal was heated in air</p> Signup and view all the answers

    What did the convenient method for counting the number of atoms of each element in a reaction suggest?

    <p>The existence of atoms and molecules</p> Signup and view all the answers

    What did the laws of chemical combination summarize?

    <p>The basic principles obeyed in the interaction of atoms and molecules</p> Signup and view all the answers

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