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Stoichiometric Calculations

Calculate the...

Question

Calculate the volume of carbon dioxide produced (in L) on heating 20 g of pure limestone at STP.

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Solution

$C a C O_{3 (s)} \to C a O + C O_{2} ↑$
1 mol of $C a C O_{3}$ decomposes to 1 mol of $C O_{2}$ .
100 g of $C a C O_{3}$ gives 44 g of $C O_{2}$ = 22.4 L of $C O_{2}$
10 g of limestone will give $C O_{2} = \frac{22.4 \times 10}{100} = 2.24 L$

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