Ionic molarity

Chemistry Level pending

In a beaker containing $$500\text{ ml}$$ of $$0.12\text{ M}$$ aqueous $$\ce{Fe{(NO_3)}_3}$$, $$100\text{ ml}$$ of aqueous $$1$$M $$\ce{Fe{Cl}_3}$$ is added, then find the molarity of the cations in the mixture.

Assume that the contents of the beaker do not react.

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