# What is the mass in #3.01 * 10^23# molecules of #F_2#?

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To calculate the mass of (3.01 \times 10^{23}) molecules of (F_2), we first find the molar mass of (F_2), which is (38.00 , \text{g/mol}). Then, we convert the number of molecules to moles using Avogadro's number ((6.022 \times 10^{23}) molecules/mol). Finally, we multiply the number of moles by the molar mass to find the mass.

[ \text{Mass} = \left(3.01 \times 10^{23} \text{ molecules}\right) \times \left(\frac{1 \text{ mole}}{6.022 \times 10^{23} \text{ molecules}}\right) \times (38.00 , \text{g/mol}) ]

[ \text{Mass} = 19.99 , \text{g} ]

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