Avogadro’s Constant (VCE SSCE Chemistry): Flashcards

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Avogadro's Constant
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Chemist's counting unit

The mole

Symbol & unit for amount of substance

nn, unit mol

Avogadro's constant value (rounded)

6.02×10236.02 \times 10^{23} mol1^{-1}

Symbol for Avogadro's constant

NAN_\text{A}

Particles in 1 mole

6.02×10236.02 \times 10^{23} particles

Formula: moles from particles

n=NNAn = \frac{N}{N_\text{A}}

NN in mole formula

Actual number of particles

Moles of O atoms in 1 mol O2\text{O}_2

2 moles

Why 'one mole of oxygen' is unclear

Could mean O atoms or O2\text{O}_2 molecules

Moles of Cl ions in 1 mol AlCl3\text{AlCl}_3

3 moles

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