please don't copy paste from other answers!

answer number 3 is a must

4 and 5 and 6 if you can

CHE 3260 Problem Set \#4 X-ray Diffraction While collecting an X-ray diffraction pattern for KBr crystals, you see a peak at 27.07 degrees two theta with a peak width (full width at half-max) of 0.3 degrees when you use CuKX-rays. 1) Compute the d-spacing of the peak. 2) Compute the diameter of the KBr crystals. 3) How would the hardness and brittleness of the KBr ceramic be affected if the crystals were four times the diameter you calculated in #2 ? 4) Is there bonding in the (200) plane for KBr ? Explain your answer. 5) Determine the five families of planes in each of the following crystal systems that would have the longest d-spacings. A) simple cubic B) body-centered cubic C) face-centered cubic 6) Calculate the lattice spacing, or d-spacing, for the (200) plane of KBr, given a lattice parameter of 6.58 \& from Problem Set 3