NMR Spectroscopy What is used to cool the superconducting coil? Dry ice Liquid helium Ice Hydrogen Dry ice Liquid helium Ice Hydrogen ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy Why is it important to use a deuterated solvent? Expensive solvents work best with NMR They dissolve polymer the fastest NMR uses least of this solvent So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition Expensive solvents work best with NMR They dissolve polymer the fastest NMR uses least of this solvent So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy When placed in a magnetic field, all the random spins of the nuclei stop rotate to 90° away from the induced field reverse direction align with the magnetic field stop rotate to 90° away from the induced field reverse direction align with the magnetic field ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy Coupling causes the peaks in 1H NMR spectra to be split into multiple peaks equal to the number of hydrogens on surrounding atoms multiple peaks equal to the number of surrounding carbon atoms two peaks multiple peaks equal to the number of hydrogen on surrounding atoms, plus one multiple peaks equal to the number of hydrogens on surrounding atoms multiple peaks equal to the number of surrounding carbon atoms two peaks multiple peaks equal to the number of hydrogen on surrounding atoms, plus one ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy What is shielding in NMR? When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei Using a curved piece of metal to block an opponents attack Blocking parts of a molecule from Rf radiation Putting metal around an Rf source When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei Using a curved piece of metal to block an opponents attack Blocking parts of a molecule from Rf radiation Putting metal around an Rf source ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy Better understanding of the nuclei is possible, with the help of wavelength spectrum None of these with the help of a mathematical translator called the fourier transfer algorithm with the help of frequencies ranges with the help of wavelength spectrum None of these with the help of a mathematical translator called the fourier transfer algorithm with the help of frequencies ranges ANSWER DOWNLOAD EXAMIANS APP
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