1) CuO+... → H2O + Cu 2) Na + H2O → ... + NaOH 3) Al+O2 → ... 4) H2 + N2 → ... 5) Ca + H 2→... 6) Zn + ... → ZnCl2 + ... 7) Н2S + ... → SO2 + ... 8) H2O → ... + ...
- First, we need to balance the chemical equation by making sure that the number of atoms on each side is equal. To do this, we can add a coefficient of 2 in front of CuO, resulting in: 2CuO + ... → H2O + 2Cu.
- To balance this equation, we can add a coefficient of 2 in front of Na, resulting in: 2Na + H2O → 2H2 + 2NaOH.
- To balance this equation, we can add a coefficient of 2 in front of Al, resulting in: 2Al + 3O2 → 2Al2O3.
- To balance this equation, we can add a coefficient of 3 in front of N2, resulting in: 3H2 + 3N2 → 2NH3.
- To balance this equation, we can add a coefficient of 2 in front of Ca, resulting in: 2Ca + 2H2 → 2CaH2.
- To balance this equation, we can add a coefficient of 2 in front of Zn, resulting in: 2Zn + 2HCl → 2ZnCl2 + H2.
- To balance this equation, we can add a coefficient of 4 in front of H2S, resulting in: 4H2S + 3O2 → 2SO2 + 4H2O.
- To balance this equation, we simply need to reverse the products and reactants, resulting in: 2H2O → 2H2 + O2.
