Question: Calcium sulfide packs into a regular pattern in a three dimensional lattice. The unit cell is the smallest repeating unit of an ionic packing structure.

 Calcium sulfide packs into a regular pattern in a three dimensional

Calcium sulfide packs into a regular pattern in a three dimensional lattice. The unit cell is the smallest repeating unit of an ionic packing structure. Remember, there are four calcium ions and four sulfide ions in the unit cell. Calculate the mass, in g, of this unit cell. Submit an answer with three significant figures. (molar mass of Ca=40.08g/mol; molar mass of S=32.07g/mol)

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