Question

iron (fe) + oxygen (o2) + water ( h2o)=?

Answer 1

Fe + O2 + H2O => Fe2O3 (Ferric Oxide or rust)


Hope this helps you!

Answer 2

Fe + $O_2$ + $H_2O$ $\rightarrow$ $Fe_2O_3$

(Iron) + (Oxygen) + (Water) $\rightarrow$ (Ferric Oxide or rust)

Explanation:

This above equation is the rusting process. When the iron comes in contact with oxygen along with water, it ends up forming ferric oxide, otherwise known as the rust.  Ferric oxide is in reddish brown color.

Some other oxides of iron are follows:

Iron(II) oxide (FeO) → Green-blue

Iron (II, III) oxide $(Fe_3O_4)$ (magnetite) → Brown-red

Iron (III) oxide $(Fe_2O_3)$ hematite → Rust