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Question

The volume of $C O_{2}$ evolved at STP on heating 50 gram of calcium carbonate

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Solution

Step 1: The chemical equation for the given reaction is:
$C a C O_{3} ⟶ C a O + C O_{2}$
Molar mass of $C a C O_{3}$ = 100 g
Molar mass of CaO = 56 g
Molar mass of $C O_{2}$ = 44 g
Step 2: According to reaction, 1 mole of $C a C O_{3}$ produces 1 mole of $C O_{2}$
100 grams of $C a C O_{3}$ produces 44 grams of $C O_{2}$
$∴$ 50 g of $C a C O_{3}$ produces $\frac{44}{100} \times 50 = 22 g$

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