阿摩線上測驗
65. What is the resonance frequency (MHz) for 13C nuclei operated in a nuclear magnetic resonance spectrometer of 400 MHz? (gyromagnetic ratio of 1 H and 13C is ~4)
(A) 100
(B) 200
(C) 400
(D) 800
(E) 1600
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統計： A(51), B(1), C(8), D(5), E(10) #2356351
統計： A(51), B(1), C(8), D(5), E(10) #2356351
詳解 (共 5 筆)
艾爾
#4856356
33. An NMR spectrameter is 400 MHz for 1 H-NMR spectra. How many MHz is it for 13C-NMR spectra?
(A) 400
(B) 300
(C) 200
(D) 100
(E) 50
5
0
艾爾
#4856358
18. An NMR spectrometer that operates at a frequency of 60 MHz for C NMR spectra, operates at what frequency for H NMR spectra?
(A) 15 MHz
(B) 30 MHz
(C) 60 MHz
(D) 120 MHz
(E) 240 MHz
4
0