Question

10g of CaCo3 decomposes to give 5.6 gram of CaO.what will be the mass of Co2 obtained

Answer 1

Answer:

4.4 g

Explanation:

CaCO₃ -----> CaO + CO₂

100 g -------> 56 g + 44 g

10 g -------> 5.6 g + 4.4 g

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Answer 2

Given :

▪ Mass of CaCO$_3$ = 10g

▪ Mass of CaO = 5.6g

To Find :

▪ Mass of CO$_2$

Decomposition Reaction :

$\bigstar\:\underline{\boxed{\bf{\orange{CaCO_3+Heat\longrightarrow CaO+CO_2}}}}$

Method-1) :

→ We can solve this type of questions by law of mass conservation.

→ As per law of mass conservation,

Mass of reactants = Mass of products

$:\implies\sf\:M_{CaCO_3}=M_{CaO}+M_{CO_2}\\ \\ :\implies\sf\:10=5.6+X\\ \\ :\implies\sf\:X=10-5.6\\ \\ :\implies\underline{\boxed{\bf{\purple{X=4.4g}}}}\:\orange{\bigstar}$

Method-2) :

→ Second method is completely based on stoichiometric calculation.

→ As per the chemical reaction, We can say that...

1mol (100g) of CaCO$_3$ gives 1mol (44g) of CO$_2$

✴ Therefore 10g of CaCO$_3$ will give 4.4g of CO$_2$

____________________________

▶ Mass of CO$_2$ obtained by the reaction = 4.4g