Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- 27. The rule you generated in Question 14b for finding the [M] peak on the mass spectrum of an unknown molecule does not work very well if there is a Br or Cl in the molecule. Shown below are spectra of various compounds containing one Br or Cl. a. Find the [M] and [M+2]* peak on each spectrum. Relative Intensity 100- Relative Intensity 80- 60 20- 0-mmm 100- 80 60- 40 18--8163 20- 25 HS-NU-2127 0-forttitor 10 20 b. 30 50 40 50 Br pretztenyeregtelefongum 75 m/z 60 m/z Bri 70 100 (2) one Br atom. 125 effleyttim 90 80 ||||||| 100 110 Relative Intensity 100 Relative Intensity 80 60- 40 20 0-m 100- 80 60 40 20 15-MM-0968 0- spatepragning 25 115--1439 25 50 50 75 NH₂ 100 m/z mn||| 75 m/z 125 100 150 125 Write a rule for quickly identifying from a mass spectrum if an unknown molecule has... (1) one Cl atom. Note: The mass spectrum of a molecule with more than one Cl or Br can be quite complex, so we will limit cases to one Cl or Br. Write a new rule for finding the [M]* peak that takes into…arrow_forwardChemistry Instrumental Analysis Class The experiment is OES: Cleaning Validation of removal of pharmaceutical drugs and calibration standards by fluoresence spectroscopy - Why the instrument use two detectors and monochromators? What type of monochromators are used in our instrument? - Do you think that a similar experiment can be prepared for the analysis of naproxen and benzoic acid? Explain.arrow_forwardSample #1 has an absorbance of 0.300. Sample #2 is the same substance and has an absorbance of 0.600 using the same equipment. What is the relative concentration of the second sample? Select one: a. The concentration of sample #2 is the square root of that of #1. b. The concentration of sample #2 is that of sample #1 squared. c. The concentration of sample #2 is half that of sample #1. d. The concentration of sample #2 is twice that of sample #1.arrow_forward
- Which of the following formulae is consistent with a molecular ion of m/z 73 in a mass spectrometry experiment? O C3H8N2 O C4H11N O C4H10O O C3H5CIarrow_forwardDraw the molecular ion (M) for this molecule formed in the mass spectrometer. H IIZ: H -e Qarrow_forward1.Calculate the theoretical yield of acetylsalicylic acid from the given starting amount of salicylic acid. Show the calculation with units. Given: 1.4 g of your salicylic acid product in a 125 mL Erlenmeyer flask; record the weight Next, briefly explain if possible:What key change do you expect to see in the IR spectrum when the salicylic acid starting material is converted to the acetylsalicylic acid product?And or: What key change do you expect to see in the 1H NMR spectrum when the salicylic acid starting material is converted to the acetylsalicylic acid product?arrow_forward
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