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Laws of Mass Conservation

By heating 10...

Question

By heating 10g of $C a C O_{3}$ , 5.6g of CaO is formed. What is the moles of $C O_{2}$ obtained in this reaction?

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Solution

The correct option is B
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The reaction involved here is decomposition of $C a C O_{3}$

$C a C O_{3} \to C a O + C O_{2}$

10g 5.6g
By law of conservation of mass, 10 - 5.6 = 4.4g of $C O_{2}$ should be obtained.
$44 g$ of $C O_{2}$ = $1 m o l e$ of $C O_{2}$

4.4g of $C O_{2}$ = $\frac{1}{10}$ mole of $C O_{2}$

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