X rays with a wavelength of 1.790 10 -10 m are diffracted at an angle of

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X rays with a wavelength of 1.790 × 10-10 m are diffracted at an angle of 14.7 degrees by a crystal of KI.

(a) What is the spacing between layers in the crystal that gives rise to this angle of diffraction? (Assume n = 1.)

(b) KI has the same crystal structure as NaCl, and the distance calculated in part a is half the length of the cube edge. Calculate the density of KI.

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Chemistry Principles And Practice

ISBN: 9780534420123

3rd Edition

Authors: Daniel L. Reger, Scott R. Goode, David W. Ball

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