25. How many of the following molecules and ions contain double or triple bonds? N2；H2CO；C2H4 ；C2H6

問題詳情

25. How many of the following molecules and ions contain double or triple bonds?

N2；H2CO；C2H4 ；C2H6；SCN-
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

參考答案

答案：99

統計：A:0,B:0,C:0,D:0,E:0

難度：計算中

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