What is the formula for iron (IV) oxide?

2 Answers
Feb 25, 2018

#FeO_2#

Explanation:

O has a charge of -2 and since you're told Fe has a charge of +4 based of the roman numeral, you need 2 Oxide ions to balance out the charge on Fe.

Feb 25, 2018

It's #Fe_2O_4# or #FeO_2#

Explanation:

Valence of iron=4
Valence of oxygen=2
When you find the least common multiple it's 8, and you divide it with valences of the particular elements.
But you can also divide the equation with 2 to get #FeO_2#