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Mass Number and Representation of Atom

A sample of c...

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A sample of calcium carbonate weighing 5g was heated. It yielded 2.25g of calcium oxide along with 1.4L of carbon dioxide. Prove that the given information explains the law of conservation of mass.

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Q. 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?

200 g

of a calcium carbonate sample decomposes on heating to give carbon dioxide and

80 g

of calcium oxide. What will be the percentage purity of calcium carbonate in the sample?
(

G i v e n : C a C O_{3} \to C a O + C O_{2}

)

50 g

of an impure calcium carbonate sample decomposes on heating to give carbon dioxide and

22.4 g

calcium oxide. The percentage purity of calcium carbonate in the sample is:

200 g

of a calcium carbonate sample decomposes on heating to give carbon dioxide and

80 g

of calcium oxide. What will be the percentage purity of calcium carbonate in the sample?
(

G i v e n : C a C O_{3} \to C a O + C O_{2}

)

Q. 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?

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Mass Number and Representation of Atom

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