Problem: The unit cells for lithium oxide and silver iodide are shown below.Show that the ratio of cations to anions in each unit cell corresponds to the ratio of cations to anions in the formula of each compound.

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The unit cells for lithium oxide and silver iodide are shown below.The unit cells for lithium oxide and silver iodide. Lithium oxides unit cell has eight lithium ions within the cell, six oxide ions within the faces of the cell (half in and half out), and eight oxide ions at the corners of the cell (one eighth in and seven eighths out). Silver iodides unit cell has four silver ions within the cell, six iodide ions within the faces of the cell (half in and half out), and eight iodide ions at the corners of the cell (one eighth in and seven eighths out).

Show that the ratio of cations to anions in each unit cell corresponds to the ratio of cations to anions in the formula of each compound.

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