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Stoichiometric Calculations

Assuming full...

Question

Assuming full decomposition, the volume of $C O_{2}$ released at STP on heating 9.85g of $B a C O_{3}$ (Atomic mass of Ba=137) will be

0.84 L

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2.24 L

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4.06 L

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1.12 L

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Solution

The correct option is D 1.12 L
$B a C O_{3} \to B a O + C O_{2} ↑$
Molecular weight of $B a C O_{3} = 137 + 12 + 3 \times 16 = 197$
$∵$ 197gm produces 22.4L at S.T.P.
$∴$ 9.85gm produces $\frac{22.4}{197} \times 9.85 = 1.12 L$ at S.T.P.

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