. 5. You are analyzing an unknown molecule, using a combination of NMR spectroscopy and mass spectrometry. In the 'H NMR spectrum you observe a triplet at 2.9 ppm EWIG integrating to 2H. In the 3C spectrum, you observe a triplet at 48 ppm.. CH2 lunin of this neak (follow the Box Method approach). 1 . 5. You are analyzing an unknown molecule, using a combination of NMR spectroscopy and mass spectrometry. In the 'H NMR spectrum you observe a triplet at 2.9 ppm EWIG integrating to 2H. In the 3C spectrum, you observe a triplet at 48 ppm.. CH2 lunin of this neak (follow the Box Method approach). 1