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 All hydrogen atoms resonate at different frequencies depending on their environment. are attached to carbon resonate at about the same frequency as carbon have the same resonance frequency resonate at different frequencies depending on their environment. are attached to carbon resonate at about the same frequency as carbon have the same resonance frequency ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy When placed in a magnetic field, all the random spins of the nuclei reverse direction rotate to 90° away from the induced field align with the magnetic field stop reverse direction rotate to 90° away from the induced field align with the magnetic field stop ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy Why is it important to use a deuterated solvent? Expensive solvents work best with NMR So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition NMR uses least of this solvent They dissolve polymer the fastest Expensive solvents work best with NMR So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition NMR uses least of this solvent They dissolve polymer the fastest ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy Better understanding of the nuclei is possible, with the help of frequencies ranges with the help of a mathematical translator called the fourier transfer algorithm with the help of wavelength spectrum None of these with the help of frequencies ranges with the help of a mathematical translator called the fourier transfer algorithm with the help of wavelength spectrum None of these ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy What is shielding in NMR? 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 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 ANSWER DOWNLOAD EXAMIANS APP
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