Question

its time for the unit exam. this is your opportunity to show how much y if you dont feel ready, you may want to stop and clarify anything you do over any notes you have taken and review the key terms. good luck! note: to answer some of the questions, it may help to reference a periodic what is the name of the compound fe₂s₃? iron sulfide diiron trisulfide iron(ll) sulfide iron(iii) sulfide

Explanation:

Step1: Determine the charge of sulfur

Sulfur (\(S\)) in sulfide has a charge of \(- 2\). In \(Fe_2S_3\), there are 3 sulfur atoms. The total negative charge from sulfur is \(3\times(-2)=-6\).

Step2: Calculate the charge of iron

Let the charge of iron (\(Fe\)) be \(x\). There are 2 iron atoms. Using the charge - balance principle (total positive charge = total negative charge), \(2x+(-6) = 0\). Solving for \(x\):

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Iron has a charge of \(+3\). In naming ionic compounds with transition metals (iron is a transition metal), we use Roman numerals to denote the charge of the metal. The anion is sulfide (\(S^{2 -}\)).

Answer:

iron(III) sulfide