Question

Ms. Sossman, the science teacher wrote a partial equation for the reaction on the white board.
Fe + O2 → Fe2O3
Using the Law of Conservation of Mass as your guide, balance this chemical equation.
A) 2Fe + 3O2 → Fe2O3 B) 2Fe + O2 → Fe2O3 C) 4Fe + 3O2 → 2Fe2O3 D) 4Fe + 3O2 → 4Fe22O3

Answer 1

Answer:

C)4Fe+3O2--->2Fe2O3

Step-by-step explanation:

If we multiply the right side by 2 then Fe=4,O=6

And, multiplying 4 by Fe and 3 by O2 on left side.

Fe=4, O=6.

Hence, the given equation is Balanced.

Answer 2

Answer

C) 4Fe+3O2→ 2FeO3

Step-by-step explanation:

Start balancing the simple molecules first, in this case the O2

Fe+3O2→Fe2O3

left side: Fe = 1; O = 2*3= 6right side: Fe = 2; O = 3

Since there are now 6O atoms on the left, there must also be 6O atoms on the right. Notice that the right hand is one big molecule so whatever coefficient you would use to balance the O atoms, you would also need to apply to the bonded Featom.Fe+3O2→2Fe2O3

left side: Fe = 1; O = 2*3 = 6

right side: Fe = 2*= 4; O = 3*2= 6

Now it is balanced;

4Fe+3O2→2Fe2O3