- 20.20-1: How do gaseous and desorption sources differ" What are the advantag...
- 20.20-2: How do the spectra for electron-impact, field ionization, and chemi...
- 20.20-3: Describe the difference between gaseous field ionization sources an...
- 20.20-4: The following figure is a simplified diagram of a commercially avai...
- 20.20-5: When a magnetic sector instrument was operated with an accelerating...
- 20.20-6: 6 Calculate the accelerating voltage that would be required to dire...
- 20.20-7: The ion-accelerating voltage in a particular quadrupole mass spectr...
- 20.20-8: On page 288 a qualitative discussion described how a positive ion w...
- 20.20-9: Why do double-focusing mass spectrometers give narrower peaks and h...
- 20.20-10: Discuss the differences between quadrupole ion-trap mass spectromet...
- 20.20-11: Calculate the resolution required to resolve peaks for(a) CH,N (ell...
- 20.20-12: What mass differcnces can just be resolved at m values of 100, 500,...
- 20.20-13: 3 Calculate the ratio of the (M + 2)' to M' and the (M + 4)+ to M p...
- 20.20-14: In a magnetic sector (single-focusing) mass spectrometer, it might ...
- 20.20-15: Measuring the approximate mass of an ion without using a standard c...
- 20.20-16: Discuss the major differences between a tandem-in-space mass spectr...
- 20.20-17: Identifv the ions responsible for the peaks in the mass spectrum sh...
- 20.20-18: Identifv the ions responsihle for the four peaks having greater mas...
- 20.20-19: Figure 20-27 shows the mass spectrum of the same compound from an e...
- 20.20-20: (a) Which mass spectrum would be hest for determining the molecular...
Solutions for Chapter 20: Molecular Mass Spectrometry
Full solutions for Principles of Instrumental Analysis | 6th Edition
The product obtainedfrom 1,2-addition across a conjugated p system.
Refers to the capacity of a substance to either add or lose a proton 1H+2. (Section 16.2)
A monocyclic compound that is planar or nearly so, has one 2p orbital on each atom of the ring, and has 4n p electrons in the cyclic arrangement of overlapping 2p orbitals, where n is an integer. Antiaromatic compounds are especially unstable
A process by which molecular oxygen is used to convert food into CO2, water, and energy.
Cyclic polyethers whose molecular models resemble crowns.
Reactions in which two p systems are joined together in a way that forms a ring. In the process, two p bonds are converted into two s bonds.
Repelled by a magnet; a diamagnetic substance contains only paired electrons. (7.8)
Hydrogens that have the same chemical environment
Any process with a negative DG.
Gibbs free energy change (DG°)
The energy that dictates the position of chemical equilibria and rates of chemical reactions. A thermodynamic function of enthalpy, entropy, and temperature, given by the equation DG° 5 DH° 2 TDS°. If DG° , 0, the position of equilibria for the reaction favors products. If DG° . 0, the position of equilibria favors reactants.
A term that refers to the rate of a reaction.
A theory that accounts for the allowed states for electrons in molecules.(Section 9.7)
Compounds that are very similar in structure to triglycerides, with the main difference being that one of the three fatty acid residues is replaced by a phosphoester group.
Changes (such as a phase change) that occur with no change in chemical composition. (Section 1.3)
A substance made up of many monosaccharide units joined together. (Section 24.8)
quaternary ammonium salt
An ionic compound containing a positively charged nitrogen atom connected to four alkyl groups.
A mixture of equal amounts of the dextrorotatory and levorotatory forms of a chiral molecule. A racemic mixture will not rotate the plane of polarized light. (Section 23.4)
Common leaving groups. Examples include tosylate, mesylate, and triflate ions.
A prefi x meaning across from.
The more substituted product (alkene) of an elimination reaction.
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