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Gay Lussac's Law

2 kg of calci...

Question

2 kg of calcium carbonate (lime stone) decomposes completely on heating, forming calcium oxide (lime) and carbon dioxide. If 880 grams of carbon dioxide is formed, what is the mass of calcium oxide formed?

A

2000 g

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B

880 g

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C

1120 g

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D

560 g

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Solution

The correct option is C 1120 g
Reaction:
$C a C O_{3} \to C a O + C O_{2}$
2 kg ? (x gm) 880 gm
According to law of conservation: $x = 2000 - 880 = 1120 g m$ .
So, mass of calcium oxide formed $= 1120 g m$

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