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

Explanation

To find the concentration of cation vacancies when NaCl is doped with \(10^{-3}\) mol% GaCl\(_3\), we can follow these steps:

### Step 1: Understand the doping percentage
Doping with \(10^{-3}\) mol% means that in 100 moles of NaCl, there are \(10^{-3}\) moles of GaCl\(_3\).

### Step 2: Calculate moles of GaCl\(_3\) per mole of NaCl
To find the amount of GaCl\(_3\) in 1 mole of NaCl:
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