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If NaCl is doped with 10^(-3) mol% of Sr...

If NaCl is doped with `10^(-3)` mol% of `SrCI_2` what is the concentration of cation vacancies?

A

`6.02xx10^16mol^-1

B

`6.02xx10^23 mol^-1`

C

`6.02xx10^14 mol^-1`

D

`6.02xx10^15 mol^-1`

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