Introducing Moles
Chemistry: AQA GCSE Higher, topic 3.1.9
Moles
Moles are a measurement of chemical amounts.
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Individual atoms
- Because atoms and molecules are so small, it is inconvenient to talk about individual atoms.
- Instead, chemical amounts can be measured in moles.
Moles
- 1 mole of a substance is 6.02x1023 atoms of that substance.
- This number is called the Avogadro constant.
Test yourself on Introducing Moles
Which of the following is a measurement of chemical amounts?
What is the Avogadro constant?
Using Avogadro's constant (6.02x1023), how many moles are represented by 1.806x1024 atoms of a substance?
Why are chemical amounts measured in moles rather than as individual atoms or molecules?
Select the true statement in each pair