Determine if the given equation if BALANCED or UNBALANCED

1. N2+H2→2NH3
2. 2C2H6+7O2→4CO2+6H2O
3. 4ZnS+6O2→4ZnO+4SO2
4. 2Fe2O3+3C→Fe+3CO2
5. C3H8+5O2→3CO2+4H2O

1. BALANCED

2. BALANCED
3. BALANCED
4. UNBALANCED
5. BALANCED