Question

What is the correct formula for iron(III) oxide?

Answer 1

Answer:

Fe 3+

Explanation:

iron is Fe and it's 3 and has positive

Answer 2

Answer:Fe2O3

Explanation:

the roman numeral tells you the charge of the metal, and you know oxygen is -2 charge so you need the least common multiple of +3 and -2 so that they cancel out, which is 6 so you need 2 of the +3 and 3 of the -2