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If an ionic solid XY (X & Y are monovale...

If an ionic solid XY (X & Y are monovalent ions) is doped with `10^-2` moles % of another ionic solid `AY_3` , then the concentration of the cation vacancies created is

A

`6.023xx10^19 mol^-1`

B

'60.23xx10^18 mol^-1'

C

'12.05xx10^21 mol^-1'

D

`1.205xx10^21 mol^-1`

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The correct Answer is:
D
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