The volume of `CO_(2)` gas liberated at S.T.P by heating 5 grams of pure lime stone is

Explanation

To find the volume of CO₂ gas liberated at STP by heating 5 grams of pure limestone (CaCO₃), we can follow these steps:

### Step 1: Write the Decomposition Reaction
The decomposition of limestone can be represented by the following balanced chemical equation:
\[ \text{CaCO}_3 (s) \rightarrow \text{CaO} (s) + \text{CO}_2 (g) \]

### Step 2: Calculate the Molar Mass of CaCO₃
To find the number of moles of CaCO₃, we first need to calculate its molar mass:
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