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- 13C(1h) what is bracket mean in this case? is that mean carbon nmr proton nmr in same time?If two signals differ by 1.5 ppm in a 300 MHz spectrometer, by how much do they differ in a 500 MHz spectrometer?Name two advantages of performing a mass spectrometry imaging experiment at high mass resolution (R.P. > 120000)
- A proton jumps between two sites with δ = 2.7 and δ = 4.8. At what rate of interconversion will the two signals collapse to a single line in a spectrometer operating at 550 MHz?Convert the accompanying transmittance data to absorbances: (a) 25.5% (b) 32.8% (c) 0.085If two signals differ by 90 Hz in a 300 MHz spectrometer, by how much do they differ in a 500 MHzspectrometer?
- Find the [FeSCN^2+]eq ε=4.0×10^3 M-1 cm^-1 at 447 nmCompute for the concentration of an alcoholic solution of Methylene blue with an absorbance reading of 0.6681. A standard calibration was done which yielded the following result: Conc ABS 3.000 ppm 0.2099 7.000 ppm 0.4421 15.000 ppm 0.7892 20.000 ppm 0.9931 Choices: a. 12.559ppm c. 14.559ppm b. 13.559ppm d. 11.559ppmApplications of NMR in Pharmaceutical, Fine Chemistry, University level, Medical Sciences, Petrochemical and Veterinary Sciences