(Solved): A11H NMR signal is observed at 146.0Hz (downfield of TMS) on a 145MHz instrument. a) What is t ...

$${\mathrm{A}}^1{}^1\mathrm{H}$$ NMR signal is observed at $$146.0\mathrm{Hz}$$ (downfield of TMS) on a $$145?\mathrm{MHz}$$ instrument. a) What is the observed chemical shift in parts per million $$(\mathrm{ppm})$$ ? Chemical shift is b) What is the chemical shift, in parts per million ( $$\mathrm{ppm}$$ ), if the sample is analyzed with a $$200.0?\mathrm{MHz}$$ instrument? Chemical shift is c) Where will the proton signal appear, in hertz, if the sample is analyzed with a $$200.0?\mathrm{MHz}$$ instrument? The downfield signal is