Calculate mass of `CO_(2)` produced by heating 40 g of 20% pure limestone,

Explanation

To calculate the mass of carbon dioxide (CO₂) produced by heating 40 g of 20% pure limestone, we will follow these steps:

### Step 1: Determine the amount of pure limestone (calcium carbonate, CaCO₃)
Given that we have 40 g of 20% pure limestone, we can calculate the mass of pure limestone as follows:

\[ \text{Mass of pure limestone} = \text{Total mass} \times \text{Purity} \]
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