What mass of sulfur hexafluoride,SF₆,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂? A)0.901 g B)8.33 g C)22.5 g D)203 g

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The number of fluorine atoms in 25.0 g of OF₂ is:$$25.0 ext{ g OF}_2 imes\frac{1 ext{ mol OF}_2}{54.00 ext{ g OF}_2} imes\frac{2 ext{ mol F}}{1 ext{ mol OF}_2}=0.926 ext{ mol F}$$To have the same number of fluorine atoms, we need 0.926 mol of SF₆:$$0.926 ext{ mol SF}_6 imes\frac{146.06 ext{ g SF}_6}{1 ext{ mol SF}_6}=\boxed{135 ext{ g SF}_6}$$

What Mass of Sulfur Hexafluoride,SF6,has the Same Number of Fluorine

What Mass of Sulfur Hexafluoride,SF₆,has the Same Number of Fluorine