Balancing of Equations?

Question

Balance the ff

1. The rxn between iron (III) oxide and carbon monoxide to yield iron and carbon dioxide

2. the rxn between potassium hydroxide and phosphoric acid to yield potassium phosphate and water

3. the decomposition rxn of sodium bicarbonate to yield sodium carbonate, water and carbon dioxide.

4. the rxn between ammonia and copper (II) oxide to yield copper, nitrogen molecule and water

Answer 1

Fe2O3 + 3CO >>2 Fe + 3CO2

3 KOH + H3PO4 >> K3PO4 + 3 H3O

2NaHCO3 >> Na2CO3 + CO2 + H2O

2NH3 + 3CuO >> 3Cu + N2 +3 H2O

Answer 2

1. redox equation: () means subscript:

3CO + Fe(2)O(3) ---> 2Fe + 3CO(2)

2. 3 KOH + H(3)PO(4) ---> K(3)PO(4) + 3H(2)O

3.2NaHCO(3) <> Na(2)CO(3) +H(2)O + CO(2)

4.2NH(3) + 3CuO ---> 3Cu + N(2) +3H(2)O