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    Ionic Bonding

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    A certain form of AgI adopts the zinc blend (ZnS & FCC) structure. The density of the salt is 5.69 g/cm3.
    a) Calculate the length of a side of the unit cell
    b) Calculate the distance between the Ag+ and the I- ions in the structure.

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    Solution Preview

    AgI adopts an FCC structure.

    We know that density is given by,
    rho = Z*M/(a^3*N)...(1)

    where, Z = No of atoms in unit cell
    N is Avogadro's Number = 6.023*10^23
    M is the Molar mass of the Crystal
    a^3 is the volume of ...

    Solution Summary

    This solution is provided in 186 words. It uses density and molar mass equations to find length, as well as internuclear distance.