A GC-MS was used to analyze an unknown sample. Based off the chromatogram, at least how many different compounds were in this sample? Mith Detector Signal Retention Time
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- Analysis of an unknown plant extract yield two peaks X and Y in a chromatogram, 15.65 and 17.03 min respectively in a 30.0 cm column. The peak base width for X is 1.06 and 1.15 for Y. The average number of plates in the column isWhen spiking a sample with isopentyl alcohol, the isopentyl alcohol peak should increase in area on the chromatogram. O 1) True O 2) FalseProvide an appropriate response. 12) The IQ scores of adults are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability that a randomly selected adult has an IQ score between 85 and 125.
- Consider the peaks for heptane (14.56 min) and p-difluorobenzene (14.77 min) in the chromatogram. The column is 30.0 m long. (a) Measure w1/2 for each peak and calculate the number of plates and the plate height for each. (b) From w1/2, compute w for each peak and find the resolution between the two peaks.Given the following spectrophotometric data, what is the concentration of the sample? Concentration, M Abs 0.000 (Blank) 0.021 0.100 0.193 0.250 0.322 0.350 0465 0.500 0668 0.750 0,801 1.00 0955 Sample 0.751use the following chromatogram and table as your data. What is the %composition of the Vitamin A peak in the sample? 78.43% 77.73% 7.867% 72.74%
- 1) 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?would column chromatography separate ketone and alcoholQUESTION 5 In a chromatographic separation using a polar stationary phase and a mobile phase composed of 60% hexane and 40% ethyl acetate, two compounds, benzene (peak A) and toluene (peak B), are eluted. The width of peak A at its base is 1.2 min, the width of peak B at its base is 1.3 min, and the retention time of peak A is 5.2 min and peak B is 3.5 min. What is the resolution (Rs) between these two peaks and is it acceptable? R = 1.36. It is not an acceptable resolution. R = 0.74. It is an acceptable resolution. R = 1.36. It is an acceptable resolution. R = 0.74. It is not an acceptable resolution.
- Q24) Consider the following data obtained from the size exclusion chromatography of polypropylene, which was made from propylene of molecular weight 42.08 g/mol. S.No. Number of Molecular Weight Molecules Range (g/mol) 5 8,000 - 16,000 16 16,000 - 24.000 3. 24 24,000 - 32,000 4 28 32,000 - 40,000 5 20 40,000 - 48,000 48,000 – 56,000 From the above data, determine a) Number average molecular weight (M). b) Weight average molecular weight ( Mw). c) Degree of polymerization (DP)Find the mean sand standard deviation of each sample.QUESTION T5 Why were the areas underneath the peaks in the gan chromatographs you eobtained mutiplied by a weight tactor? DA the corrction factor compensates for user error OB Rame lonization detectors (FID) respond slightly dfferent to compounds with diferent molecular weights OCnone of the answers OD. the GC (GOW MAC 350) used contains a quadrapole mass spec detector whose response must be corrected for the miz ratio of the diferent ions obtainen for diferert moleculestune OE not all molecules have the same themmal conductivity QUESTION 16 Which list of functional groups is present in the anti-viral drug Arbidol HO Br O A Thioether, alkene, ester, amide, amine O 8. Thioether alcohol, ester, amine OC Alcohol, ether, amide, epoxide, thioester OD. Ether, ketone olefin, amine, alcohol O E Thioalcohol, alkene, ether, amine, nitro
