Complete the missing components/variables given as x and y in the following reactions
`CaCO_(3)(s) overset(x)to CaO(s) +CO_(2) (g) `

Explanation

To complete the missing components in the reaction:

1. **Identify the reaction**: The reaction involves calcium carbonate (CaCO₃) decomposing into calcium oxide (CaO) and carbon dioxide (CO₂).

2. **Write the initial reaction**:
\[ \text{CaCO}_3(s) \overset{x}{\rightarrow} \text{CaO}(s) + \text{CO}_2(g) \]
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