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60 g of a non-volatile solid AB(having c...

60 g of a non-volatile solid AB(having crystals like NaCl or CaCl) is dissolved in 0.50 kg water. The normal boiling point of solution is found to be `102.08^(@)` C. The molal elevation of water is 0.52 K-kg `mol^(-1)`. The density of solid AB is 6.25 g`//cm^(3)` and the edge-lengthh of unit cell is 400 pm.The coordination number for `A^(+)` ion in the solid is :
(`N_(A)=6xx10^(23))`

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