Avogadro's Number

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How many molecules are in 3.72mol of fluorine?

$2.24\times10^{24}\ \text{molecules}$

CORRECT

$6.18\times10^{-24}\ \text{molecules}$

$70.68\ \text{molecules}$

$0.20\ \text{molecules}$

Convert from moles to molecules using Avogadro's number:

$(\text{moles})\times(\frac{6.02\times10^{23}\text{molecules}}{\text{mole}})=\text{molecules}$

Use the moles given in the question to solve.

$3.72mol\times \frac{6.02\times10^{23}\ \text{molecules}}{1mol}=2.24\times10^{24}\ \text{molecules}$