b) Figure 3 is the DOSY spectrum of reaction medium in flow forselected peak. Flow rate is 3 mL/min total time of the experimentwas 80 s. Identify the number of compounds that can be observedin the DOSY spectrum and justify your answer. |Diffusion coefficient / 10-10 m²s-135252015105110987654321H chemical shift /ppm

Answer:To identify the number of compounds in the DOSY spectrum, we need to analyze the diffusion…

Answered: b) Figure 3 is the DOSY spectrum of…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Similar questions

What is the relationship between chemical shift in ppm and operating frequency?
What is the plate height if the length of the column is 10cm?
If peak A has a width of 10 min and peak B has a width of 16 mins, what is the column resolution?
To compensate for a complex or unknown matrix, the ● · · ● A. Calibration curve OB. Standard addition Method O C. Internal Standard Method O D. Dilution method O E. Least-Squares Analysis O F. Standardization method should be used to determine the analyte concentration.
A UVIVIS molecular absorption spectrometric determination of analyte X in aqueous solution gave the following calibration data (absorbances corrected for the blank). Estimate the concentration of Xin an aqueous sample that yielded an instrument response of 0.238 (A 1.00- mL cuvette was used for all absorbance measurement s) OA. 7.7 ppm OB. 8.0 ppm, 148 O c. 23.8 ppm O D.0.0308 ppb OE. 0.8 ppm Concentration (ppm X) 1.0 2.0 5.0 7.0 8.5 10.0 Absorbance 0.031 0.068 0.150 0.221 0.262 0.308 3:49 PM
5
which of the folowing(s) is/are true ? 1 split ratio in GC is a ratio of sample passed to column to amount of mobile phashe 2 column resolution decreases with increasing column lenght 3 decreasing the tube diameter ,increases the resolution
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 < CH3COOC2H5
Provide a structure of the fragment in the mass spec producing the peak at 139 m/z and a structure for the fragment that was lost.
In a HPLC separation of two compounds, A and B, the retention times observed are 3.5 min. for A and 4.5 min. for B on a 15 cm column. The retention time for the mobile phase is 1.0 min. The peak widths (at the base) for A and B are 0.5 and 0.7 min respectively. Calculate the following: (i) The capacity factor of A and B. (ii) The peak resolution. (iii) The average number of theoretical plates in the column
A sample of explosives residue is dissolved in an appropriate solvent and is injected into HPLC. The column contains a non- polar stationary phase. The sample revealed three chemical compounds that are commonly present in homemade explosives. ТAТP DADP HMTD 1 2 3 4 5 6 7 8 Retention time (minutes) a) determine the retention time of TATP. b) which one elute first :DADP,TATP or HMTD? c) State and explain which compound is most polar. d) If you are investigating this terrorist attacks, state one way in which the information in the chromatogram would be useful.
How do you start to determine this

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