The empirical formula of compound is Na3AlF6.
what is empirical formula?
A formula that lists the proportions of the constituent elements but not the number or arrangement of atoms in the composite.
We convert the percentages from percent to grams since they represent the mass percentages of each component in the entire composite.
32.79% Na -32.79g Na
13.02% Al - 13.02g AL
54.19% F -54.19g F
The number of moles is determined by dividing each mass by its corresponding molar mass.
32.79g÷22.99 g/mol
Na = 1.426 mol Na
13.02g÷26.98g/mol
Al = 0.4825 mol Al
59.19g÷18.99 g/mol
F= 2.85 mol F
We divide each of these amounts by the least number of moles among the three quantities in order to find the empirical form of the compound that demonstrates the simplest ratios between its constituents.
Na= 1.426 mol Na÷0.4825 mol=3Na
Al=0.4825mol Al÷0.4825mol = 1 Al
F= 2.85mol F÷0.4825mol = 6 F.
The empirical formula is Na 3AlF 6
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