Mole Concept
Which statement is correct regarding Avogadro's hypothesis?
Select the correct option:
Solution
Equal volumes of gases at same T and P contain equal numbers of molecules
- Statement: Avogadro's Law states that at constant temperature and pressure, the volume of a gas is directly proportional to the number of molecules (or moles) present.
- Key Conclusion: Consequently, equal volumes of all gases (at the same T and P) contain an equal number of molecules.
- Why other options are wrong:
- Different gases have different molar masses, so equal volumes do NOT have equal masses.
- Molecules can be monoatomic or polyatomic, so equal molecules do not necessarily mean equal atoms.
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About This Question
- Subject
- chemistry
- Chapter
- some basic concepts in chemistry
- Topic
- mole concept
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Equal volumes of gases at same T and P contain equal numbers of molecules
- Statement: Avogadro's Law states that at constant temperature and pressure, the volume of a gas is directly proportional to the number of molecules (or moles) present.
- Key Conclusion: Consequently, equal volumes of all gases (at the same T and P) contain an equal number of molecules.
- Why other options are wrong:
- Different gases have different molar masses, so equal volumes do NOT have equal masses.
- Molecules can be monoatomic or polyatomic, so equal molecules do not necessarily mean equal atoms.
This easy difficulty chemistry question is from the chapter some basic concepts in chemistry, covering the topic of mole concept. It appeared in the 2025 exam.
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