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- 20 Convert 78Ftou (8E-32)x +233= 299K 21. Draw the lewis Dot strucure Soreaon Sy mbel Sor eaen elemont 14 3: latm Propane is comfessed 22. A calben containing JomL 3! to 25atm wheet is tne now voume P,Vi =Pz V2 latm PI Vr Some レz 23 A Solution contains 1.2¥103mHelto and 5.6x104 mn cloz what is the PH3. 11 100 TRANSMETTANCE D C8H9CIO 4000 10 HSP-01-151 9 3000 8 2:2 7 2000 6 : 5 ppm 2 NAVENUMBERal 4 3 1500 : Vala 2 1000 3 1 0 500 200 180 COS-04-715 DEPT-90 DEPT-135 160 140 120 بلد لد 100 ppm 80 60 40 20 01) Study the chromatograph (below) of a mixture of Compounds A and B, run on the GCs in the teaching labs at CU Boulder. Compound A has the shorter retention time. STAAT 61 1.11 227 RT TYPE AREA XXXX XXXX XXXX AREAS 0.009 55874 44.117 ARIHT 0.61 XX XX XX 1.11 2.27 XX XX XX TOTAL AREA=XX MUL FACTOR=XX 1. What is the retention time of compound A? Compound B? 2. Which compound is present in a larger amount? 3. Which compound has the lower boiling point? 4. What would happen to the retention times of compounds A and B if the column temperature were raised? 5. You suspect that compound B is octane. What can you do to provide supporting evidence for this hypothesis?
- 1. Molecular Formula: C4H8O2 ¹HNMR in CDC13: Integration values provided next to each expanded peak. 2 9.0 4.1 8.0 4.0 7.0 13CNMR in CDC13: 170.0 200 3.9 6.0 3 5.0 2.0 4.0 60.0 100 1.9 3.0 2.0 3 1.0 1.2 21.0 20.0 19.0 0.0 + 18.0 17.0 16.0 15.0 14.0What is the resolution in ppm NO3-N of a spectrophotometer that gives a reading of 0.600 absorbance units for 25 ppm NO3-N? The resolution of the instrument is 0.001 absorbance units.100 80 60 20 % of base peak 30 40 80 V (cm¹) M**#103 120 160 m/e 200 Mass Spectrum C4H9NO₂ 240 280 21 No significa absorption ab
- 1P:18 H.W_cb040d6af52ed4a10c727e8c47881b07.pdf Case 1 A 43-year-old patient suffering from frequent urination and dry tongue was asked by the doctor to analyze RBS, HbA1c and GTT. Results were as follows: RBS = 45 mg\dl 2h GTT = 250 mg\dl HbA1c = 7.5% %3D What interpretation of the result? Case 2 A 35-year-old pregnant woman had a regular check-up and the doctor found the sugar slightly elevated (RBS = 146 mg\dl). What interpretation of the result?Mass spectrometry is an extremely versatile detection system for GC. However, interfacing an HPLC system to a mass spectrometer is a much more difficult task. Describe the major reasons why it is more difficult to combine HPLC with mass spectrometry than it is to combine GC with mass spectrometry.100 C4H200 O C3H₁3Cl O C5H10N C6H14 C6H12 80 60 40 20 0 10 20 40 60 m/z 80 100 120 140 MassSpec9. Select the most reasonable formula for the molecule analyzed, based on the provided data (parent peak m/z at 84):
- Polarities of analyte functional group increase in the order of hydrocarbon < ethers < esters < ketones < aldehydes < amides < amines < alcohols Arrange the order of elution [from shortest to longest retention time] for the following six compounds from an HPLC C18 column. C2H5OH CH3COCH3 CH3COOH CH3COOC2H5 C2H50C2H5 (СН3)2NH O A. C2H5OH < CH3COOH < (CH3)2NH < CH3COCH3 < CH3COOC2H5Question 3 [20]3.1 Propose structures for compounds that fit the following data:a) A ketone with M+ = 72 and fragments at m/z = 57 and m/z = 29(3)b) An alkane with M+ = 86 and fragments at m/z = 71, m/z = 41 and m/z = 15(4)3.2 Propose fragmentation patterns of the molecules below to determine which molecule willshow m/z peaks at 43, 57, 87, 101 and 116:a) Isopropyl bromideb) Propyl chloridec) sec-Butyl isopropyl ether(13)what are the significant peaks of C4H9Br at 2970 cm-1 1209 cm-1SEE MORE QUESTIONS