Ngày tải lên :
30/08/2013, 23:10
... l: A CH3COOH, C2H2, C2H4 B C2H5OH, C2H2, CH3COOC2H5 C C2H5OH, C2H4, C2H2 D HCOOC2H3, C2H2, CH3COOH Cõu 35: Dung dch X cha hn hp gm Na 2CO3 1,5M v KHCO3 1M Nh t t tng git cho n ht 20 0ml dung dch ... chung l: B CnH2n-3CHO (n 2) A C2H2n-1CHO (n 2) D CnH2n+1CHO (n 0) C CnH2n(CHO )2 (n 0) Cõu 22 : Hũa tan hon ton 12, 42 gam Al bng dung dch HNO loóng (d), thu c dung dch X v 1, 344 lớt ( ktc) hn ... C3H6 v 0 ,2 mol C3H4 C 0 ,2 mol C2H4 v 0,1 mol C2H2 D 0 ,2 mol C3H6 v 0,1 mol C3H4 A 0,1 mol C2H4 v 0 ,2 mol C2H2 Cõu 8: X phũng hoỏ hon ton 1,99 gam hn hp hai este bng dung dch NaOH thu c 2, 05 gam...