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  4. What volume of CO2 released at STP on heating 9.85 g of BaCO3 ? (Atomic mass of Ba=137 ), (assuming fully decomposed)

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Q. What volume of $CO_{2}$ released at STP on heating $9.85$ $g$ of $BaCO_{3}$ ? (Atomic mass of $Ba=137$ ), (assuming fully decomposed)

NTA AbhyasNTA Abhyas 2020Some Basic Concepts of Chemistry

Solution:

$BaCO_{3} \rightarrow BaO+CO_{2}\uparrow$

Molecular weight of $BaCO_{3}=137+12+3\times 16=197$

$\because \, 197 \, \text{g}$ produces $22.4 \, \text{L}$ at S.T.P.

$\therefore \, \text{9} \text{.85} \, \text{g}$ produces $\frac{22.4}{197}\times 9.85=1.12$ $L$ at $S.T.P.$