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- Pls solve this question correctly in 5 min i will give u like for sure What evidence supports or refutes that during an experiment, purified extract is pure caffeine?A method of quantitative determination of the concentration of constituentsof a sample analyzed by gas chromatography is area normalization. Thiscomplete elution of all sample constituents is required. Thearea of each peak is measured and corrected for the detector response to the diffe- renteseluatos. This correction involves dividing the area by an empiricalcorrection factorDetermined. The concen ration of the analyte is found from the ratio between itscorrected and the total corrected area of all peaks. For a chromatogram containing threerelative areas were determined as 16.4; 45,2; and 30.2, in the order ofincreased retention time. Calculate the percentage of each compound if therelative responses from the detector are 0.65, 0.73 and 0.85, respectively.1%9V lli. O 1 M A;Yv 1. IF found impurity the melting point - Increase - Not effect - Decrease 2. benzoic acid can be purified by sublimation at . . pressure - high - low - normal 3. . . separates liquids with closer boiling points. * - fractional distillation - Extraction - Simple distillation with increasing 4. melting points molecular weight."
- C B) C) D) E) (C6H5)3P NH₂ Zn(Hg) HCI ۵۰۰ NaOH heat DMSO 1. Excess CH31 2. Ag₂O, H₂O 3. heat -O 53% 35°F Cloudy 12(4) Below are depictions of a student's TLC plates in which fractions 1 - 10 from their column are spotted. Lane 1 2 3 4 5 67 8 9 10 (a) Which fractions contain pure fluorenone? Which contain pure ferrocene? (b) Which lanes, if any, represent mixed fractions? (c) Would the student incorporate lanes 6 and 7 into an Erlenmeyer flask of a combined fraction? Explain with 10 words or less.T TrineOniline | Trine U in CH---214-01-5P-202 x E Problem Set 8.pdf 0 Mail - Outwater, Peri: X C Solvent Free Reduct x A New teb A Adobe Scan Apr 26. O File | CUsers/paris/Downloads/Problem%20Set%208.pdf 1 O A Page view A* Read aloud V Draw E Highlight v O Erase of 1 O Add text 1. In the Diels-Alder reaction below, six isomeric products A-F are depicted. However, only one of these is the major product formed. CM: OMe OMe CN .CN .CN OMe "Ma Me Ma CN OMs OMe OMe Me Me Me GN 'CN ON D E a) In the boxes above, label the diene and dienophile. b) Identify the two isomers that are unreasonable based on the concerted mechanism of the Diels-Alder reaction. (Hint: look at the geometry of the dienophile) Isomers: and c) Label the four remaining isomers as either endo or exo products. Endo: and Exo: and d) Of the two endo products, which would you predict to be favored based on regio- chemistry electronics? Explain your choice using resonance structures for full credit. Major Product: 41"F 2:05 PM…
- a. Calculate the base saturation using the following given miliequivalent weights obtained from a 25g soil sample (a. Ca++= 2.23 m.e.; b. Mg++=1.32 m.e.; c. Na+= 1.98 m.e.; d. K+= 1.87 m.e.; e. H+= 1.27 m.e.; f. Al+++= 0.11 m.e.; g. NH4+= 2.3 m.e.; h. NO3-= 1.5 m.e. b. Calculate the CEC (m.e./100g soil) using the following given miliequivalent weights obtained from a 25g soil sample (a. Ca++= 2.23 m.e; b. Mg++=1.32 m.e.; c. Na+= 1.98 m.e.; d. K+= 1.87 m.e.; e. H+= 1.27 m.e.; f. Al+++= 0.11 m.e.; g. NH4+= 2.3 m.e.; h. NO3-= 1.5 m.e.A student was asked to identify the best recrystallization solvent for compound X. Below is the experimental data obtained. Which is the best solvent of choice? Observations: vs= very soluble; so=soluble; ss= slightly soluble; in = insoluble Test tube 1 2 3 Solvent A B C Hot water bath vs vs ss Room temperature so ss in Ice water bath so in in Group of answer choices None B C Acalculate the following for each sample gas chromatograph. a) retention time for each peak (label peaks) b) area of each peak c) %composition Sample GC of starting material for distillation of solution that is 40% ethyl acetate and 60% propyl acetate.
- Why does the %T on the spectrophotmete keep going up and down? It won't give an exact measurement.Temperature Wavelength A 0.64 g sample containing KCI ( mw = 74.6 ) is dissolved in 50mL of water and titrated to the Ag2CrO4 end point, requiring 26.2 mL of 0.15 * ? M AGNO3 .The %w/w KCI in the sample is 4. %3D Non of these 58.6% 45.8% 25.2% Which of the following alcohols would be most soluble in * ?water Heptanol O Hexanol Ethanol O Pentanol If 20mL of a 0.40M Mg(OH)2 solution is used to titrate 25mL of HCIWhy acetone has les retention time and toluene has more. discus about polarity of 3 samples and interaction with stationary phase