Problem: Deduce the formula of iron(III) sulfide.

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We’re being asked to give the chemical formula of iron(III) sulfide.


The rules for naming binary ionic compounds are as follows:

1. The metal keeps its name and is named and written first.

– For transition metals, we use Roman numerals to denote its charge.


2. The nonmetal keeps its base name but has its ending changed to –ide.


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Problem Details

Deduce the formula of iron(III) sulfide.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Naming Ionic Compounds concept. You can view video lessons to learn Naming Ionic Compounds. Or if you need more Naming Ionic Compounds practice, you can also practice Naming Ionic Compounds practice problems.

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Based on our data, we think this problem is relevant for Professor Malina's class at UNL.