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Mole Concept

The total no ...

Question

The total no of ions present in 111 g of $C a C l_{2}$ is

One mole

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Two mole

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Three mole

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Four mole

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Solution

The correct option is C Three mole
$C a C l_{2}$ has a molar mass of $111 g / m o l$ . This, on dissociation gives one $C a^{2 +}$ and two $C l^{- 1}$ ions. It gives total 3 ions. Therefore it gives 3 moles of ions.

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