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Question

The ratio of the mass of C-12 atom to that of an atom of element X (whose atomicity is four) is 1 : 9. Themolecular mass of element X is


A

480 g mol1

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B

432 g mol1

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C

72 g mol1

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D

108 g mol1

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Solution

The correct option is B

432 g mol1


Molecular mass = weight of moleculeweight of 112th part of C12 atom

Mass of element X=9×12×4=432


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