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Questions and Answers
Which statement best describes the law of chemical combination?
Which statement best describes the law of chemical combination?
- Elements combine in fixed ratios to form compounds. (correct)
- Elements combine in variable ratios to form compounds.
- Elements do not combine to form compounds.
- Elements combine in random ratios to form compounds.
What is the fundamental principle behind the law of chemical combination?
What is the fundamental principle behind the law of chemical combination?
- Atoms of different elements can combine in variable ratios to form compounds.
- Atoms of different elements can combine in fixed ratios to form compounds. (correct)
- Atoms of different elements cannot combine to form compounds.
- Atoms of different elements can combine in any ratio to form compounds.
Why is the law of chemical combination important in chemistry?
Why is the law of chemical combination important in chemistry?
- It affects the atomic structure of elements.
- It has no significance in the study of chemistry.
- It determines the color of elements in compounds.
- It helps in predicting the properties of compounds. (correct)
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Study Notes
The Law of Chemical Combination
- The law of chemical combination states that a chemical compound always contains the same proportion of elements by mass, regardless of its source or method of preparation.
- This law is a fundamental principle in chemistry, establishing that a pure chemical compound has a constant composition.
Importance of the Law of Chemical Combination
- The law of chemical combination is important in chemistry because it enables chemists to define a chemical compound and distinguish it from other substances.
- It provides a basis for chemical formulas and equations, which are used to represent chemical reactions.
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