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The density of solid sodium chloride, NaCl, is 2.17 g/cm3. Use your knowledge of the sodium chloride lattice to calculate the spacing between Na+ and Cl- nearest neighbors, in cm.
(Atomic masses (amu) are: Na, 22.99; Cl, 35.45. Also, 1 amu = 1.661 × 10-24 g)
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