Question

c) choose the best answer. a scientist discovers the percent composition for iron sulfate (feso₄) shown in the following table fe 36.7% s 21.1% o 42.2% what does this data show? there are 42.2 moles of s in feso₄. for every 100 g of feso₄, there are 21.2 g of o. for every 100 g of feso₄, there are 36.7 g of fe. there are 57.8 moles remaining if s is removed.

Explanation:

Step1: Analyze percent composition meaning

Percent composition means grams of element per 100 g of compound.

Step2: Verify each option

• Option1: % is not mole count, so wrong.
• Option2: Calculate mass of O: $100\mathrm{g} \times 42.2\% = 42.2\mathrm{g}$, not 21.2g, wrong.
• Option3: Calculate mass of Fe: $100\mathrm{g} \times 36.7\% = 36.7\mathrm{g}$, correct.
• Option4: % is not mole count, so wrong.

Answer:

For every 100 g of FeSO₄, there are 36.7 g of Fe.