Calculate the frequency separation of the nuclear spin levels of a 13C nucleus in a magnetic field of 15.9 T given that the magnetogyric ratio is 6.73 × 107 T-1 s-1.Ans = ______  MHz. (Note: because the magnetogyric ratio of 13C nucleus is only about 1/4th of that of a proton, the frequency of resonance is also only about 1/4th of the proton resonance frequency in the same instrument.

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Q: In 2015, scientists developed a 1020-MHz NMR instrument. Calculate the strength of the magnet.

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