The balanced equation :
8Al + 3Fe₃O₄→ 4Al₂O₃ + 9Fe
You just have to look for which element is in bold because the question is not clear
Equalization of chemical reaction equations can be done using variables. Steps in equalizing the reaction equation:
1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.
2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product
3. Select the coefficient of the substance with the most complex chemical formula equal to 1
Reaction
Al + Fe₃O₄→ Al₂O₃ + Fe
give a coefficient
aAl + Fe₃O₄→ bAl₂O₃ + cFe
O, left=4, right=3b⇒3b=4⇒b=4/3
Al, left=a, right=2b⇒a=2b⇒a=2.4/3⇒a=8/3
Fe, left=3, right=c⇒c=3
The equation becomes :
8/3Al + Fe₃O₄→ 4/3Al₂O₃ + 3Fe x3
8Al + 3Fe₃O₄→ 4Al₂O₃ + 9Fe
