Determine the four-indices and three-indices Miller-Bravais directions shown below for the hexagonal close-packed (HCP) structure (with detailed steps). (12 marks) (i) (ii)

Please try to answer the question within 25 minutes with both sub parts a,b

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3.3 The figure below shows the first five peaks of the x-ray diffraction pattern for tungsten (W), which has a BCC crystal structure; monochromatic x-radiation having a wavelength of 0.1542 nm was used. (a) Index (i.e., give h, k, and I indices) for each of these peaks. (b) Determine the interplanar spacing for each of the peaks. (c) For each peak, determine the atomic radius for W. How 40.0 60.0 Diffraction angle 20 0.0 20.0 80.0 100.0

True or false and why is false 1   There are 2 major classes of keratins: alpha keratins (found in mammals) and beta keratins (found in feathers and scales of birds and reptiles) 2  One estimate of mobility within a crystal is the B-factor that reflects spreading or blurring of electron density   3 In NMR, the longitudinal relaxation time (T1) reflects the rate at which magnetization returns to the longitudinal axis after a pulse

3.) At room temperature the electrical conductivity of PbTe is 500 (Q-m)1 whereas the electron and hole mobilities are 0.16 and 0.075 m?/V-s, respectively. Compute the intrinsic carrier concentration for PbTe at room temperature. a) 1.33 x 1020 m3 b) 1.33 x 1023 m3 c) 1.33x 1022 m3 d) 2.13 x 10 m3 e) 2.13 x 105 m3

Login AM McGraw Hill IT Central Auth MOTION EYE OWLv2 | Assic Content Which compound will be more likely to exist as a hydrated solid? Co(NO3)3 NaBr https://east.cengagenow.com/in/takeAssignment/takeCovalentActivity.do?locator=assignment-take OWLv2 | On [References]

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3. Transition metals of the periodic table are known to adopt either a tetrahedral or square planar configuration when it has a coordination number of 4. Consider the inorganic complex ZrI4. a) Draw the structure, determine all symmetry elements and operations, and assign point group classification of Zr14 if it is tetrahedral, and square planar. (10 pts) b) If Zrl is tetrahedral, how many IR absorption peaks is expected given its point group classification? (2 pts) c) If Zrl4 is square planar, how many IR absorption peaks is expected given its point group (2 pts) classification? d) The IR spectrum of gaseous Zrl4 shows absorption peaks at 55 cm-1 and 245 cm-1. This data is consistent with what shape of ZrI4. (2 pts)

M Che X GA Hon X A OW X A Cha X a http x OW X A My x E Clas X E Clas X enow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=Dassignment-take [Review Topics) [References) Use the References to access important values if needed for this question. The gas phase decomposition of nitrosyl chloride at 400 K NOCI(g) NO(g) + Ch(g) is second order in NOCI. In one experiment, when the initial concentration of NOCI was 3.43×102 M, the concentration of NOCI dropped to 6.21×10³M after 1.49×10 seconds had passed. Based on these data, the rate constant for the reaction is Submit Answer Retry Entire Group 9 more group attempts remaining Next 8:23 PM 10/7/2020 home enc inrt sc delete 144 近