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- Band Distance (mm) MW (kb) 1 15 23.10 18 9.40 21 24 28 38 6.70 4.40 230 2.00 7 41 0.56 8 60 0.12 234 6If light machinery oil has a viscosity of 5E-2 Pa-s and density of 970 kg/m³ at 25°C, how long will it take for a sample to pass through a viscometer if water under this condition takes 1 min? Density of water is 1000 kg/m³ and its viscosity is 8.9E-4 Pa-s.A. 36.5 minB. 47.7 minC. 57.9 minD. 64.4 minWhat are the advantages of a dropping-mercury electrode in polarography? Why is polarography used mainly to study reductions rather than oxidations?
- The following are the basic components of XRD except- Source Primary optics Sample Holder Cantilever Secondary optics Provides quantitative, elemental, chemical state and functional group information from the surface of materials, detecting all elements except H and He AFM SEM XPS XRD SIMS A surface analysis technique that uses a cantilever to scan over a region of interest. The cantilever deflects towards or away from the surface due to the attractive and repulsive forces with the sample. AFM SEM XRD XPS SIMSThe part of SEM that is responsible for the production of electrons. * Electron guns Condenser lens Secondary detector Electron beam A surface analysis technique used for determining elemental composition on surfaces of solid samples. AFM SEM XRD SIMS XPS A surface analysis technique that uses a cantilever to scan over a region of interest. The cantilever deflects towards or away from the surface due to the attractive and repulsive forces with the sample. AFM SEM XRD XPS SIMS6.) An unknown polymer sample is fractionated, and the following molar fractions are obtained. Calculate Mn and Mw and the dispersity. Fill out the table to show your work. Fraction # 1 2 3 4 5 6 n₁ (mol) 0.004 0.011 0.009 0.003 0.017 0.008 M; (g/mol) 10,400 12,080 13,950 16,700 18,150 20,000 n¡Mi n;M;²
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