**Step 1: **24.5% Na, 14.9% Si, and 60.6% F by mass.** **Recall that ** mass percent** is given by:

$\overline{){\mathbf{\%}}{\mathbf{}}{\mathbf{mass}}{\mathbf{=}}\frac{\mathbf{mass}\mathbf{}\mathbf{of}\mathbf{}\mathbf{X}}{\mathbf{total}\mathbf{}\mathbf{mass}}{\mathbf{\times}}{\mathbf{100}}}$

Assuming we have **100 g** of the compound, this means we have **24.5 g Na, 14.9 g Si, and 60.6 g F**.

Determine the empirical formulas of the compounds with the following compositions by mass.

24.5% Na, 14.9% Si, and 60.6% F

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