Which of the following combinations of peaks appears in the 1H NMR spectrum of diethyl ether, CH3CH2OCH2CH3? a. a triplet and a doublet b. a quartet and a sextet c. two singlets d. a triplet and a quartet Which of the following combinations of peaks appears in the 1H NMR spectrum of 1,2-dimethyoxyethane, CH3OCH2CH2OCH3? a. two singlets b. a singlet and a triplet c. a singlet and two triplets d. a doublet and a triplet Please explain!?