Using a 60 MHz spectrometer, a chemist observes the following peak: doublet, J = 7 Hz, at 4.00 ppm What would be the coupling constant of this peak (in Hz) as measured by a 300 MHz spectrometer?  INCLUDE UNITS!

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Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.