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Ice crystallizes in a hexagonal lattice. At the low temperature at which the structure was determined, the lattice constants were $a = 4.35 A^{\large\circ}$, and b = 7.00 $A^{\large\circ}$. How many molecules are contained in a unit cell? [density (ice) = $0.92 gm/cm^3$)

1 Answer

4 molecules of $H_2O$
Hence (A) is the correct answer.
answered Jun 4, 2014 by sreemathi.v