The wavelength of the X-rays that is reflected from an ionic crystal with a lattice structure is 2 nm. The density of the lattice structure is 3.32 g/cm. The lattice constant of the 01 stricture is 6.0 A. The molecular weight is 108 AMU. The lattice structure is, [Hìnt: 1 AMU =1.66 x10" kg] %3D

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