Question

Поставить коэффициенты1. Li + O2 = Li2O 2. Fe + S → FeS; 3. Al + Cl2 → AlCl3; 4. P + O2 = P2O5 5. Al + O2 = Al2O3 6. BaO + H2O = Ba(OH)2 7. Na2O + CO2 = Na2CO3 8. CaO + SO2 = CaSO3 9. Zn + CuSO4 = ZnSO4 + Cu↓ 10. Al + HCl = AlCl3 + H2↑

Answer 1

4Li + O2 = 2Li2O 2. Fe + S → FeS; 3. 2Al + 3Cl2 → AlCl3; 4. 4P + 5O2 = 2P2O5 5. 4Al + 3O2 = 2Al2O3 6. BaO + H2O = Ba(OH)2 7. Na2O + CO2 = Na2CO3 8. CaO + SO2 = CaSO3 9. Zn + CuSO4 = ZnSO4 + Cu↓ 10. 2Al + 6HCl = 2AlCl3 + 3H2↑

Answer 2

To balance the chemical equations, we need to ensure that the number of atoms of each element on both sides of the equation is equal. Here are the balanced equations:

1. 4Li + O2 = 2Li2O
2. 4Fe + 3S → 4FeS
3. 2Al + 3Cl2 → 2AlCl3
4. 4P + 5O2 = 2P2O5
5. 4Al + 3O2 = 2Al2O3
6. BaO + H2O = Ba(OH)2
7. Na2O + CO2 = Na2CO3
8. CaO + SO2 = CaSO3
9. Zn + CuSO4 = ZnSO4 + Cu↑
10. 2Al + 6HCl = 2AlCl3 + 3H2↑

Please note that in equation 9, the symbol "↓" indicates the formation of a precipitate (solid copper). In equation 10, "↑" indicates the evolution of a gas (hydrogen). All the equations are now balanced, meaning the number of atoms of each element is the same on both sides.