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20.0g of a magnesium carbonate sample de...

20.0g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide . What will be the perpentage purity of magnesium carbonate in the sample ? (Atomic weight of Mg=24)

A

60

B

84

C

75

D

96

Text Solution

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The correct Answer is:
B
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