5 S+ {* C& O5 E) ^& g/ l第九题化学英语题 9 j8 x# B+ j- v7 J. u0 J. HWhat is always correct about the molecular ion, M+, in a mass spectrum of a compound?5 c2 S9 g' e9 F, {+ z) b- n$ ](欢迎访问avcar:https://avcar.vip)
A. The M+ ion peak has the smallest m/z ratio in the mass spectrum.4 k: Y* Z4 N% T5 `0 P) f* s z(欢迎访问avcar:https://avcar.vip)
B. The m/z ratio of the M+ ion peak gives the relative molecular mass of the molecule. 0 o) ~ g% U, d5 o. IC. The M+ ion is the most stable fragment formed during electron bombardment.' B- B9 s0 K4 B8 F& N# w(欢迎访问avcar:https://avcar.vip)
D. The M+ ion peak has the greatest intensity in the mass spectrum.% n) s% B. p6 t8 p(欢迎访问avcar:https://avcar.vip)