Learning objective
Explain the Avogadro constant as the number of particles in one mole.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Amount of substance
Subtopic
The mole and the Avogadro constant
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Quick explanation
Explain the Avogadro constant as the number of particles in one mole
- This point belongs to Amount of substance, especially The mole and the Avogadro constant.
- You need to be able to explain the Avogadro constant as the number of particles in one mole.
- The key ideas to know are Avogadro constant, particles, and mole.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect The mole and the Avogadro constant to exam-style questions, flashcards, and revision notes for Amount of substance.
Quick student answer
Which of the following best describes the Avogadro constant?
Direct answer
The number of particles in one mole
Key terms
- Avogadro constant: The number of elementary entities in one mole of a substance, 6.022×10^23 mol^−1.
- Mole: The amount of substance that contains as many elementary entities as there are atoms in 12 g of carbon‑12.
Common trap
Confusing Avogadro constant with Avogadro number: The Avogadro constant is a conversion factor with units mol^−1 that links moles to particles. The Avogadro number refers to the number of atoms in 12 g of carbon‑12, which is 6.022×10^23.
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Revision notestopic notes
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Open revision notesRelated learning objectives
- Define relative atomic mass in relation to carbon-12.
Relative atomic mass and relative molecular mass
- Define relative molecular mass in relation to carbon-12.
Relative atomic mass and relative molecular mass
- Use relative formula mass for ionic compounds.
Relative atomic mass and relative molecular mass
- Calculate relative molecular or formula mass from a chemical formula and relative atomic masses.
Relative atomic mass and relative molecular mass
- Apply the mole to electrons, atoms, molecules, ions, formula units and equations.
The mole and the Avogadro constant