Using Mandarin to answer the short questions is allowed except question 32 and 33.
21. Urea, (H2N)2CO, is excreted by mammals and can be used as a fertilizer.
申論題內容
21g. The mass spectrum of urea is shown below.
Identify the species responsible for the peaks at the mass/charge ratio (m/z) equal to 60 and 44. [2 marks]
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Identify the species responsible for the peaks at the mass/charge ratio (m/z) equal to 60 and 44. [2 marks]