Practice Law Of Constant Proportions (7.7) - Study of Gas Laws

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6 sample questions

Question 1.
What does the Law of Constant Proportions state?
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Think about how compounds are structured.
Question 2.
Give an example of a chemical compound that follows this law.
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Consider the elements involved in water.
3Question 3.
What is the main statement of the Law of Constant Proportions?
- Compounds can have varying compositions
- Compounds are made up of fixed proportions by mass
- Compounds are always made of one type of element
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Think about the consistency of compounds.
4Question 4.
True or False: The composition of water changes based on the amount of water.
- True
- False
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Recall the mass percentages of hydrogen and oxygen.
Question 5.
Calculate the mass of hydrogen needed to create 50 g of water using the Law of Constant Proportions.
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Use the ratios provided.
Question 6.
If a compound is analyzed and found to be 60% oxygen and 40% carbon, deduce its empirical formula.
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Convert masses to moles to find the simplest whole-number ratio.

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