Ca + 02= 6 Fe + HC1 → FeCh + H2 2 S + = SO2 7 CH4 + 02 → ....+..... Al + 02 = 8 K+ H0 → KOH+ H2 4 Br2 + = HBr 9 Fe203 + H2 = 5 c + = CHA 10 CaCh + AgNO3 = Ca(NO3)2 + AgCl

Let's balance the chemical equations provided:

1. Ca + O2 → CaO

   • Balanced: 2Ca + O2 → 2CaO

2. Fe + HCl → FeCl3 + H2

   • Balanced: 2Fe + 6HCl → 2FeCl3 + 3H2

3. S + O2 → SO2

   • Balanced: S + O2 → SO2 (already balanced)

4. CH4 + O2 → CO2 + H2O

   • Balanced: CH4 + 2O2 → CO2 + 2H2O

5. Al + O2 → Al2O3

   • Balanced: 4Al + 3O2 → 2Al2O3

6. K + H2O → KOH + H2

   • Balanced: 2K + 2H2O → 2KOH + H2

7. Br2 + H2 → HBr

   • Balanced: Br2 + H2 → 2HBr

8. Fe2O3 + H2 → Fe + H2O

   • Balanced: Fe2O3 + 3H2 → 2Fe + 3H2O

9. CaCl2 + AgNO3 → Ca(NO3)2 + AgCl

   • Balanced: CaCl2 + 2AgNO3 → Ca(NO3)2 + 2AgCl

Please double-check the last reaction you provided; you wrote “CaCh” instead of “CaCl2” for calcium chloride. If you need any more help with chemistry, feel free to ask!