Question

What is the name of `Fe_2S_3`?

Answer 1

The compound's name is iron (III) oxide.

Explanation:

`Fe` is Iron. We see that `S` has the subscript of "3", and the two elements make up an ionic compound. So we know that electrons were transferred. Thus we can determine that it was Iron (III).

`Fe` has a subscript of 2. Reversing the transfer, we get sulfur's charge.

Therefore, the compound's name is iron (III) oxide.

Hope this helps :)