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0.002 molal aqueous solution of an ionic...

0.002 molal aqueous solution of an ionic compound with molecular formula `Co(NH_(3))_(5)(NO_(2))Cl` freezes at `-0.00744^(@)C`. How many moles of ions does 3 moles of the salt produce on being dissolved in water? [Given `K_(f)` of water=1.86 K kg `mol^(-1)`]

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