Practice Law Of Definite Proportions (1.5.2) - SOME BASIC CONCEPTS OF CHEMISTRY

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6 sample questions

Question 1.
Define the Law of Definite Proportions.
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Focus on the constancy of composition.
Question 2.
Give an example of a compound that follows the Law of Definite Proportions.
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Consider common chemical compounds.
3Question 3.
What does the Law of Definite Proportions state?
- It states that elements can combine in any ratio.
- It states that a given compound always contains the same proportion of elements by weight.
- It describes the behavior of gas mixtures.
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Focus on fixed ratios in compounds.
4Question 4.
Is the composition of water variable?
- True
- False
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Think about how water is made and its ratios.
Question 5.
Given 100g of sodium chloride (NaCl), calculate the mass of sodium and chlorine in this sample based on the Law of Definite Proportions.
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Use the molar mass to find the proportions.
Question 6.
If different samples of water contain 0.9g of hydrogen and 8g of oxygen, do they still represent the same water? Explain using the law.
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Focus on the mass ratios.

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