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Mole Concept

The molecular...

Question

The molecular mass of a salt of oxy acid of chlorine of a divalent metal which contains more number of oxygen atoms than its corresponding '-ic' acid is $239 g / m o l e$ .
What is the atomic mass of the metal?

A

24

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B

39

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C

40

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D

30

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Solution

The correct option is D 40
The formula of the salt with molecular weight 239 is $C a (C l O_{4})_{2}$ and thus the divalent metal is calcium with atomic weight 40.

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