Question

Relate the concept of mole with avagadro's number.

Answer 1

Avogadro's number is $6.022 \times 10^{23}$. It means how many elementary units (atoms or molecules) are in 1 mole of a given substance.

$$n = N / N_{A}$$

N – how many atoms or molecules are in a given substance.

$N_{A}$ – Avogadro's number

n – how many moles of a given substance

For example we have $60.22 \times 10^{23}$ molecules of water. How many moles of water do we have?

$$n = N / N_{A} = 60.22 \times 10^{23} / 6.022 \times 10^{23} = 10 \text{ moles of water}$$

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