作者plumagejenny (小可)
看板post-b.test
标题[问题] 有机化学 光谱
时间Sun May 1 23:56:37 2011
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
我选E 我不知道错在哪里@@" 断裂峰是在断在较高级碳上对吧@@?
请善心人士帮我回答!!!感激不尽!!!
2. which of the following is highest in energy per photon?
A) electromagentic radiation with a wavenumber of 10的负二次方 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
我选B@@ 因为我想说 能量跟频率成正比@@" 错在哪里呢@@?
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◆ From: 122.117.56.157
1F：→ MarioC:第二题 单位 频率单位是1/s吧 05/02 00:43
2F：推 allen4:看 M-1 第四号碳上的碳氢键被打断 所以128-1 = 127 05/02 10:49
3F：→ plumagejenny:谢谢:D 05/02 23:36