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A sample of mixture of CaCl(2) and NaCl ...

A sample of mixture of `CaCl_(2)` and NaCl weighing 2.22 gm was treated to precipitate all the Ca as `CaCO_(3)` which was then heated and quantitatively converted to 0.84 gm of CaO. Calculate the percentage (by mass )of `CaCl_(2)` in the mixture.

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The correct Answer is:
`75%`
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