What mass of sulfur hexafluoride SF6 has the same number of fluorine atoms as 25.0 g of oxygen difluoride OF2?

To find the mass of sulfur hexafluoride (SF6) that has the same number of fluorine atoms as 25.0 g of oxygen difluoride (OF2), we first determine the number of fluorine atoms in OF2. Each molecule of OF2 has 2 fluorine atoms, so 25.0 g of OF2 contains 2 moles of fluorine atoms (since the molar mass of OF2 is approximately 50 g/mol).

In SF6, each molecule contains 6 fluorine atoms. To match the 2 moles of fluorine atoms from OF2, we need (\frac{2}{6} = \frac{1}{3}) of a mole of SF6. The molar mass of SF6 is approximately 146 g/mol, so the mass of SF6 required is (\frac{1}{3} \times 146 \approx 48.67 , \text{g}).