What mass of xenon tetrafluoride,XeF₄,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂?

Question

Quizplus · Accepted Answer

To solve this problem, we need to find the number of fluorine atoms in 25.0 g of OF2 and then find the mass of XeF4 that contains the same number of fluorine atoms.

25.0 g OF2 contains:

- 1 mole OF2 = 18.998 g OF2 (molar mass of OF2)
- 25.0 g OF2 x (1 mole OF2/18.998 g OF2) = 1.32 moles OF2
- 1 mole OF2 contains 2 fluorine atoms, so 1.32 moles OF2 contains 2.64 moles fluorine atoms
- 2.64 moles fluorine atoms x (1 mole XeF4/4 moles fluorine atoms) = 0.66 moles XeF4
- 0.66 moles XeF4 x 207.29 g XeF4/mol = 48.0 g XeF4

Therefore, the mass of XeF4 that contains the same number of fluorine atoms as 25.0 g OF2 is 48.0 g. The correct answer is C.

What Mass of Xenon Tetrafluoride,XeF4,has the Same Number of Fluorine

What Mass of Xenon Tetrafluoride,XeF₄,has the Same Number of Fluorine