What is the chemical formula for iron(iii) hydroxide? hydroxide is oh o a. fe(oh)2 o b. feoh fe2oh o c. o d. fe(oh)3 o e. fe2(oh)3

Explanation:

The problem gives you the systematic name for the Iron (III) hydroxide, it means that the Iron in the compound is using its oxydation number +3, that is:

And as an hydroxide, has the hydroxide ion, which oxidation number is -1:

To form the Iron (III) hydroxide there are the iron and the hydroxide ion, and their oxidation numbers take its position below the opposite ion, that is: