select the correct answer from each drop - down menu. what is the empirical formula? a compound is used to…

select the correct answer from each drop - down menu. what is the empirical formula? a compound is used to treat iron deficiency in people. it contains 36.76% iron, 21.11% sulfur, and 42.13% oxygen. the empirical formula is fe s o

select the correct answer from each drop - down menu. what is the empirical formula? a compound is used to treat iron deficiency in people. it contains 36.76% iron, 21.11% sulfur, and 42.13% oxygen. the empirical formula is fe s o

Answer

Explanation:

Step1: Assume 100g of the compound

So, we have 36.76g of iron (Fe), 21.11g of sulfur (S), and 42.13g of oxygen (O).

Step2: Calculate the number of moles of each element

The molar - mass of Fe is approximately 55.85 g/mol, for S is 32.07 g/mol, and for O is 16.00 g/mol. The number of moles of Fe: $n_{Fe}=\frac{36.76g}{55.85g/mol}\approx0.66mol$ The number of moles of S: $n_{S}=\frac{21.11g}{32.07g/mol}\approx0.66mol$ The number of moles of O: $n_{O}=\frac{42.13g}{16.00g/mol}\approx2.63mol$

Step3: Find the mole - ratio of the elements

Divide each number of moles by the smallest number of moles (0.66mol in this case). For Fe: $\frac{0.66mol}{0.66mol}=1$ For S: $\frac{0.66mol}{0.66mol}=1$ For O: $\frac{2.63mol}{0.66mol}\approx4$

Answer:

1, 1, 4