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compared to 1H nuclei that are 17) 17) 1H nuclei located near electronegative atoms tend to...
15) 15) Which of the following statements describes the meaning of mutorotation? A) a slow change...
15) 15) Which of the following statements describes the meaning of mutorotation? A) a slow change between the Dand L forms B) a slow exchange between hydrogen and deuterium C) a slow change in optical rotation to reach an equilibrium value D) a rapid exchange between the a and B forms of sugars E) a rapid exchange between the Dand L. forms 16) What is the major product of the following reaction? PCI, CH --CH-CH:CH pyridine OH A) CH, CH-CH:CH,...
MetroPCS Wi-Fi 8:41 AM Done Attachment (3 points each) Circle the best answer. 1. A nucleus...
MetroPCS Wi-Fi 8:41 AM Done Attachment (3 points each) Circle the best answer. 1. A nucleus with an atomic number or an atomic mass has a nuclear spin that can be observed by t he NMR spectrometer. a. odd, odd b. even, even d. odd, even c. even, odd 2. In H NMR, how many nuclear spin states are allowed for the H nucleus? a. b. 3 d. 1 3. Electromagnetic radiation in the used in H NMR spectroscopy rcgion...
1. List the most common nuclei that are used in NMR. 2. How many nuclear spin...
1. List the most common nuclei that are used in NMR. 2. How many nuclear spin states are possible for the 1H nucleus? A. 1 B. 2 C. 4 D. 5 E. none of these 3. Which of the following electromagnetic radiation is used in NMR spectroscopy? A. UV B. IR C. visible D. γ-rays E. radio wave 4. _______ protons experience a net magnetic field strength that is smaller than the applied magnetic field. A. Deshielded B. Shielded C. ...
MULTIPLE CHOICE QUESTIONS [25 marks) 1. Which of the following technique(s)can readily distinguish between: CHsCO2C...
MULTIPLE CHOICE QUESTIONS [25 marks) 1. Which of the following technique(s)can readily distinguish between: CHsCO2CH2CH3 and CH3CH2CO2CH A. NMR B. IR C. MS D. A and C 2. 1H nuclei located near electromagnetic atoms tend to berelative to iHi nuclei which are not. A. Shielded D. Deshielded C.Resonanced D. None of the above What splitting pattern is observed in the 1H NMR spectrum for the underlined hydrogens? CH3CH2CH(CI)CH2CH2OH A. doublet B. triplet C. quartet D.quintet 4. What splitting pattern is...
Chose the right statement a. 1H and 13C nuclei are unique in their ability to exhibit...
Chose the right statement a. 1H and 13C nuclei are unique in their ability to exhibit the NMR phenomenon Nele with b. 1H and 13C nuclei are not unique in their ability to exhibit the NMMR phenomenon All c. 1H and 13C nuclei are not unique in their ability to exhibit the NMR phenomenon Ail Iuse d. None of them. an odd number of protons (3 2H, 14N 19, 31P) will not be applicable with an even number of protons...
14. Why are most subduction zones located near the edge of continents? a. This is commonly...
14. Why are most subduction zones located near the edge of continents? a. This is commonly the location where continental crust and oceanic crust meet. b. A density difference between subducting plates create a significant void at the point of subduction. c. Ocean water causes the colliding plates to cool and contract. d. All of the above. 15. (1) What is an island arc? a. A large wooden boat that ferries animals from one island chain to another. b. A...
Compared with open-end funds, closed-end funds a. Tend to invest in less liquid assets b. Tend...
Compared with open-end funds, closed-end funds a. Tend to invest in less liquid assets b. Tend to invest in foreign assets c. Tend to invest in Treasury securities d. Are actively managed to seek a target return If output were at potential and inflation were 4 percent (2 percent above the central bank’s target), the appropriate setting of the federal funds rate under a Taylor would be a. 4 percent b. 7 percent c. 6 percent d. Cannot be determined...
A constant output loudspeaker produces a sound level of 97 dB at 10 feet when located...
A constant output loudspeaker produces a sound level of 97 dB at 10 feet when located at the corner of two walls. What will be the sound level at the same distance if it is placed in an open area? a. 91 b. 94 d. 103 106 e. f. None of the above c. 97 A 200 Hz source radiates sound that produces a SPL of 85 dB at a distance of 1 meter. Is this SPL in the near-field?...
25-30 25. Which of the atoms listed below is the most electronegative? A) Li B) Cs...
25-30
25. Which of the atoms listed below is the most electronegative? A) Li B) Cs C)P D) As E) Ge 26. The number of pi bonds in the molecule below is ?? ?? A) 2. B) 4. C) 6. D) 10. E) 15 27 Which of the following molecules have the same geometries? 28. Which of the following is a basic oxide? 29. Which of the following elements behaves chemically similarly to oxygen? 30 Lanthanide (or rare earth elements)...
The signals in the 1H NMR spectrum of butanoic acid are labelled from A to D....
The signals in the 1H NMR spectrum of butanoic acid are labelled from A to D. Considering the spectrum, answer the questions below: [4 marks] Complete the table: Signal Chemical shift, δ (ppm) Splitting pattern (singlet, doublet, triplet, quartet, pentet, sixtet, septet, octet, nonet, multiplet) # of H neighbours Integration (# of protons) Circle or highlight the proton(s) that give rise to this signal A 11.60 CH3CH2CH2COOH B 2.35 CH3CH2CH2COOH C 1.68 CH3CH2CH2COOH D 0.98 CH3CH2CH2COOH [2 marks] Compare this...
15) 15) Which of the following statements describes the meaning of mutorotation? A) a slow change between the Dand L forms B) a slow exchange between hydrogen and deuterium C) a slow change in optical rotation to reach an equilibrium value D) a rapid exchange between the a and B forms of sugars E) a rapid exchange between the Dand L. forms 16) What is the major product of the following reaction? PCI, CH --CH-CH:CH pyridine OH A) CH, CH-CH:CH,...
MetroPCS Wi-Fi 8:41 AM Done Attachment (3 points each) Circle the best answer. 1. A nucleus with an atomic number or an atomic mass has a nuclear spin that can be observed by t he NMR spectrometer. a. odd, odd b. even, even d. odd, even c. even, odd 2. In H NMR, how many nuclear spin states are allowed for the H nucleus? a. b. 3 d. 1 3. Electromagnetic radiation in the used in H NMR spectroscopy rcgion...
MULTIPLE CHOICE QUESTIONS [25 marks) 1. Which of the following technique(s)can readily distinguish between: CHsCO2CH2CH3 and CH3CH2CO2CH A. NMR B. IR C. MS D. A and C 2. 1H nuclei located near electromagnetic atoms tend to berelative to iHi nuclei which are not. A. Shielded D. Deshielded C.Resonanced D. None of the above What splitting pattern is observed in the 1H NMR spectrum for the underlined hydrogens? CH3CH2CH(CI)CH2CH2OH A. doublet B. triplet C. quartet D.quintet 4. What splitting pattern is...
Chose the right statement a. 1H and 13C nuclei are unique in their ability to exhibit the NMR phenomenon Nele with b. 1H and 13C nuclei are not unique in their ability to exhibit the NMMR phenomenon All c. 1H and 13C nuclei are not unique in their ability to exhibit the NMR phenomenon Ail Iuse d. None of them. an odd number of protons (3 2H, 14N 19, 31P) will not be applicable with an even number of protons...
14. Why are most subduction zones located near the edge of continents? a. This is commonly the location where continental crust and oceanic crust meet. b. A density difference between subducting plates create a significant void at the point of subduction. c. Ocean water causes the colliding plates to cool and contract. d. All of the above. 15. (1) What is an island arc? a. A large wooden boat that ferries animals from one island chain to another. b. A...
A constant output loudspeaker produces a sound level of 97 dB at 10 feet when located at the corner of two walls. What will be the sound level at the same distance if it is placed in an open area? a. 91 b. 94 d. 103 106 e. f. None of the above c. 97 A 200 Hz source radiates sound that produces a SPL of 85 dB at a distance of 1 meter. Is this SPL in the near-field?...
25-30
25. Which of the atoms listed below is the most electronegative? A) Li B) Cs C)P D) As E) Ge 26. The number of pi bonds in the molecule below is ?? ?? A) 2. B) 4. C) 6. D) 10. E) 15 27 Which of the following molecules have the same geometries? 28. Which of the following is a basic oxide? 29. Which of the following elements behaves chemically similarly to oxygen? 30 Lanthanide (or rare earth elements)...
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