Ngày tải lên :
14/08/2014, 00:21
... HCOOC(CH3)Cl-CH3 Cõu 37: Hũa tan 2 ,49 gam hh kim loi ( Mg, Fe, Zn) bng lng va dd H2SO4 1M, thu c1, 344 lớt H2 (kc) Th tớch dung dch H2SO4 cn dựng l: A 1,2 lớt B 0, 24 lớt C 0,06 lớt D 0,12 lớt Cõu ... Zn Cõu 26: Sp xp cỏc cht sau: H2, H2O, CH4, C2H6 theo th t nhit sụi tng dn: A H2 < CH4 < C2H6 < H2O B H2 < CH4 < H2O < C2H6 C H2 < H2O < CH4 < C2H6 D CH4 < H2 < C2H6 < H2O Cõu 27:: Ly 9,1gam hp ... 2,0 v 1,0 Cõu 34: Ion CO32- cựng tn ti vi cỏc ion sau mt dung dch: A NH4+, Na+, K+ B Cu2+, Mg2+, Al3+ C Fe2+, Zn2+, Al3+ HSO4- D Fe3+, Cõu 35 Dung dch E cha cỏc ion Mg2+, SO42-, NH4+, Cl- Chia...