Question

When the chemical reaction shown below reaches equilibrium, which of the following would you expect to find?
CaO(s) + CO2 (g) Two arrows stacked on top of each other. The top arrow points to the right. The bottom arrow points to the left. CaCO3 (s)
only CaCO3 (s), as the reaction reaches completion

a new set of products, as CaCO3 (s) reacts with CaO (s) and CO2 (g)

only CaO (s) and CO2 (g), as the reverse reaction reaches completion

a mixture of CaCO3 (s), CaO (s), and CO2 (g), as both the forward and reverse reactions occur