How many grams of calcium oxide are obtained by heating $50 g$ of $C a C O_{3} (s)$ ?

56 g

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4 g

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28 g

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44 g

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Solution

The correct option is C $28 g$
$C a C O_{3} (s) \to C a O (s) + C O_{2} (g)$
1 mol of $C a C O_{3}$ produces 1 mol of $C a O$
i.e., 100 g of $C a C O_{3}$ produces $56 g$ of $C a O$
So, $50 g$ of $C a C O_{3}$ will produce $28 g$ of $C a O$

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