Write numbers in the boxes to balance the equations below. 1. __ H2 + __ O2 → __ H2O 2. __ Cu + __ O2 → __...

Write numbers in the boxes to balance the equations below.
1. __ H2 + __ O2 → __ H2O
2. __ Cu + __ O2 → __ CuO
3. __ Na3PO4 + __ HCl → __ NaCl + __ H3PO4
4. __ Fe + __ Cl2 → __ FeCl2
5. __ AgI + __ Na2S → __ Ag2S + __ NaI
6. __ Al + __ HCl → __ AlCl3 + __ H2
7. __ SiO2 + __ HF → __ SiF4 + __ H2O
8. __ SnO2 + __ H2 → __ Sn + __ H2O
9. __ Al + __ O2 → __ Al2O3
10. __ Fe + __ O2 → __ Fe2O3
11. __ P4 + __ O2 → __ P2O5
12. __ N2 + __ H2 → __ NH3
13. __ CH4 + __ H2O → __ H2 + __ CO
14. __ C3H8 + __ O2 → __ C8H18 + __ H2O
15. __ Mg(OH)2 + __ HCl → __ MgCl2 + __ H2O