Question

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.

Answer 1

Answer: 1. 2 CaCO3 => 2 CaO + 2 CO2

2. 2 O2 + N2 => 2 NO2

3. FeS + 2 HCl => FeCl2 + H2S

Explanation: The variables for each chemical reaction makes them balanced.