(4分)(1)已知:M(A)=6.75×M(CH 4)=16×6.75=108,则有:
N(C)="108×77.8%/12=7" N(H)=108×7.4%=8
N(O)=108×(1-77.8%-7.4%)/16="1" 所以,A的分子式为C 7H 8O
(2)由已知条件可知A的可能结构简式是:
和
略
(4分)(1)已知:M(A)=6.75×M(CH 4)=16×6.75=108,则有:
N(C)="108×77.8%/12=7" N(H)=108×7.4%=8
N(O)=108×(1-77.8%-7.4%)/16="1" 所以,A的分子式为C 7H 8O
(2)由已知条件可知A的可能结构简式是:
和
略