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CHEM - 2.1.3 Amount of Substance > The Mole > Flashcards

Flashcards in The Mole Deck (4)
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1

What is the amount of substance?

- It is a quantity referred to as n to count the number of particles in a substance.
- Measured in a unit called the mole (mol).

2

Avogadro Constant

- The Avogadro constant is 6.02 x 10^23 mol-1, the number of particles in each mole of carbon-12.
- 1 mole is the amount of a substance that contains 6.02 x 10^23 particles.

3

Molar mass

- Mass per mole of a substance. Units: gmol-1
- n=m/Mr

4

Molar gas volume

- The volume per mole of gas molecules at a stated temperature and pressure.
- At RTP, 1 mole of gas molecules has a volume of approx. 24 dm3
- At RTP molar gas volume is 24dm3mol-1
- n = v (dm3) / 24