Me equalize: fe2o3 + h2 = fe + h2o

Fe₂O₃ + 3H₂ ⟶ 2Fe + 3H₂O

Explanation:

Fe₂O₃ + H₂ ⟶ Fe + H₂O

We could balance this equation by inspection, but I will choose the oxidation number method.

1. Calculate the oxidation number of every atom:

Fe₂⁺³O₃⁻² + H₂⁰ ⟶ Fe⁰ + H₂⁺O²⁻

2. Identify the changes in oxidation number:

Fe: +3 ⟶    0; Change =  -3

H:   0 ⟶   +1; Change =  +1

3. Equalize the changes in oxidation number.

You need 3 atoms of H for every 1 atom of Fe or 6 atoms of H for every 2 atoms of Fe. This gives us total changes of +6 and -6.

4. Insert coefficients to get these numbers.

1Fe₂O₃ + 3H₂ ⟶ 2Fe + 3H₂O

Every formula has a coefficient. The equation should be balanced.

5. Check that all atoms balance.

Atom  Left-hand side  Right-hand side

 Fe               2                           2

 O                3                            3

 H                6                            6

OK.

The balanced equation is

Fe₂O₃ + 3H₂ ⟶ 2Fe + 3H₂O

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates