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The diagram represents the unit cell for a crystal of calcium sulfide, CaS(s), which has the sodium chloride structure. The radii of the ions are: rCa2+ = 106 pm and rS2- = 184 pm.
a) Calculate the edge length of the CaS unit cell (in pm) b) Calculate the mass of one unit cell of CaS (in g) c) Calculate the density of CaS(s) (in g/cm3) d) Calculate the minimum distance (in pm) between the edges of two S2- ions within the unit cell of CaS"
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