Balance each equation by writing the correct coefficient (put a space in the box if no coefficient is needed). Then, identify the type of reaction taking place.
1. CaCO3 → CaO+CO2
___CaCO3 → ___CaO+___CO2 is a decomposition reaction.
2. O2 + N2 → NO2
___O2+___N2 → ___NO2 is a synthesis reaction.
3. FeS + HCl → FeCl2 + H2S
___FeS+___HCl → ___FeCl2+___H2S is a replacement reaction.
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