We’re being asked to determine the empirical formula of a compound composed of Na, Al, and F, given the mass percent of Na and Al.
Recall that the empirical formula is the simplest whole-number ratio formula of a compound.
For this problem, we need to do the following steps:
Step 1: Calculate the mass and moles of Na, Al, and F in the compound.
Step 2: Determine the lowest whole number ratio of Na, Al, and F to get the empirical formula.
Determine the empirical formulas of the compounds with the following compositions by mass.
32.79% Na, 13.02% Al, and the remainder % F
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