有機化學 光譜 - 考試

1.what m/z value would you predict for the most stable fragment peak in the
mass spectrum of 4-ethylheptane?

A) 128
B) 127
C) 113
D) 99
E) 85

Answer: B

我選E 我不知道錯在哪裡@@" 斷裂峰是在斷在較高級碳上對吧@@?
請善心人士幫我回答!!!感激不盡!!!

2. which of the following is highest in energy per photon?
A) electromagentic radiation with a wavenumber of 10的負二次方 cm-1
B) electromagentic radiation with a frequency of 10的七次方cm/s
C) electromagentic radiation with a frequency of 10的五次方cm/s
D) electromagentic radiation with a wavelength of 10 cm
E) electromagentic radiation with a wavenumber of 10的六次方cm

Answer: D
我選B@@ 因為我想說 能量跟頻率成正比@@" 錯在哪裡呢@@?


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