Learning objective
Calculate amounts using particle number and the Avogadro constant.
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
Calculate amounts using particle number and the Avogadro constant
- This point belongs to Amount of substance, especially The mole and the Avogadro constant.
- You need to be able to calculate amounts using particle number and the Avogadro constant.
- The key ideas to know are Avogadro constant.
- 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
What is the number of particles in 2 moles of a substance?
Direct answer
1.204 × 10^24
Key terms
- Mole: A mole is the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.
- Avogadro's constant: Avogadro's constant is the number of particles in one mole of a substance, approximately 6.02 × 10^23.
Common trap
Incorrect use of Avogadro's constant: Remember that to find the number of moles, you divide the number of particles by Avogadro's constant.
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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
- Explain the Avogadro constant as the number of particles in one mole.
The mole and the Avogadro constant