A balanced chemical equation indicates the proportions or ratios of the various reactants and products to one another. From the coefficients in the balanced chemical equation, we can create mole-mole ratios that relate any of the various chemicals to a different chemical. Which is a possible mole-mole ratio for the following balanced chemical equation? 4 Fe(s) + 3 O2(g) → 2 Fe₂O₃(s)
1) 4 Fe(s) : 3 O2(g)
2) 4 Fe(s) : 2 Fe₂O₃(s)
3) 3 O2(g) : 2 Fe₂O₃(s)
4) 2 Fe₂O₃(s) : 3 O2(g)
