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Mole Concept

Calcium carbo...

Question

Calcium carbonate decomposes on heating to form calcium oxide and carbon dioxide. According to law of conservation of mass, if $5.6 g m s$ of calcium oxide and $4.4 g m s$ of carbon dioxide are formed, how much calcium carbonate was taken?

A

15g

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B

10g

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C

12g

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D

None of these

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Solution

The correct option is D 10g
According to the law of conversation of mass,
Total mass of reactant $=$ total mass of products
$= 5.6 + 4.4$
$= 10$ g
Mass of $C a C O_{3} = 10$ g

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