Question

Numbers of formula units in unit cell cells of mgo

Answer 1

Answer:

These compounds form an extensive a 3 dimensional network where the boundaries between molecules are difficult to determine. The formula of ionic compounds are the empirical formula and are called the formula units.

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Answer 2

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There are four formula units of ZnS per unit cell (S: 8 corners (8/8) + 6 faces (6/2), Zn: 4 tetrahedral holes (4/1)).