阿摩線上測驗
20. Using a 60 MHz spectrometer, a chemist observes the following absorption: doublet, J = 7.0 Hz, at δ 4.00. What would the
chemical shift (δ) be in the 300 MHz spectrum?
(A) 3.50
(B) 4.00
(C) 4.50
(D) 20.0
(E) 0.80
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統計： A(1), B(10), C(0), D(2), E(4) #1037006
統計： A(1), B(10), C(0), D(2), E(4) #1037006
