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Q: All samples of carbon dioxide contain carbon and oxygen in a mass ratio of 3:8. This is in agreement with the rule of ––––––––––––––.
  • A. Conservation of Mass
  • B. Constant Proportion
  • C. Mutual Proportion
  • D. Energy Conservation
Correct Answer: Option B - According to the law of definite ratio or the law of constant proportion, 'the ratio of masses of elements in a chemical compound is fixed. For example, the ratio of carbon and oxygen to all samples of carbon dioxide will be in the ratio of 3:8.
B. According to the law of definite ratio or the law of constant proportion, 'the ratio of masses of elements in a chemical compound is fixed. For example, the ratio of carbon and oxygen to all samples of carbon dioxide will be in the ratio of 3:8.

Explanations:

According to the law of definite ratio or the law of constant proportion, 'the ratio of masses of elements in a chemical compound is fixed. For example, the ratio of carbon and oxygen to all samples of carbon dioxide will be in the ratio of 3:8.