NMR Spectroscopy All hydrogen atoms are attached to carbon have the same resonance frequency resonate at different frequencies depending on their environment. resonate at about the same frequency as carbon are attached to carbon have the same resonance frequency resonate at different frequencies depending on their environment. resonate at about the same frequency as carbon ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy Why is it important to use a deuterated solvent? Expensive solvents work best with NMR NMR uses least of this solvent They dissolve polymer the fastest So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition Expensive solvents work best with NMR NMR uses least of this solvent They dissolve polymer the fastest So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy What is used to cool the superconducting coil? Dry ice Liquid helium Hydrogen Ice Dry ice Liquid helium Hydrogen Ice ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy What is shielding in NMR? Putting metal around an Rf source Blocking parts of a molecule from Rf radiation Using a curved piece of metal to block an opponents attack When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei Putting metal around an Rf source Blocking parts of a molecule from Rf radiation Using a curved piece of metal to block an opponents attack When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei 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 two peaks multiple peaks equal to the number of surrounding carbon atoms multiple peaks equal to the number of hydrogen on surrounding atoms, plus one multiple peaks equal to the number of hydrogens on surrounding atoms two peaks multiple peaks equal to the number of surrounding carbon atoms multiple peaks equal to the number of hydrogen on surrounding atoms, plus one ANSWER DOWNLOAD EXAMIANS APP
NMR Spectroscopy When placed in a magnetic field, all the random spins of the nuclei stop align with the magnetic field reverse direction rotate to 90° away from the induced field stop align with the magnetic field reverse direction rotate to 90° away from the induced field ANSWER DOWNLOAD EXAMIANS APP
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