3FeO4 + 8Al --> 3Fe + 4Al2O3
The balanced equation is 3 Fe3O4 + 8 Al -> 4 Al2O3 + 9 Fe. Therefore, the coefficient of Fe is 9.
This equation is Al2O3 + 6 HCl = 2 AlCl3 + 3 H2O.
The balanced chemical equation for the reaction between Al and O2 is: 4Al + 3O2 -> 2Al2O3 Therefore, the coefficient needed for Al to balance the equation is 4.
3
2
The balanced equation is 3 Fe3O4 + 8 Al -> 4 Al2O3 + 9 Fe. Therefore, the coefficient of Fe is 9.
This equation is Al2O3 + 6 HCl = 2 AlCl3 + 3 H2O.
The balanced chemical equation for the reaction between Al and O2 is: 4Al + 3O2 -> 2Al2O3 Therefore, the coefficient needed for Al to balance the equation is 4.
3
2
Al2O3 + 6HBr = 2Albr3 + 3H2O
2Si +2HF-2siF + 2H
2
The coefficient of O2 is 5.The chemical equation is:C5H12 + 8 O2 = 5 CO2 + 6 H2O
Cu + 2H2SO4 ==> CuSO4 + SO2 + 2H2OSo coefficient of CuSO4 is 1
2K + 2H2O --> 2KOH + H2 The balanced equation shows that there is a 2 in front of water.
Al2O3 + H2SO4 = Al2(SO4)3 + H2O