... phỳt, khụng k thi gian giao Cõu 1.Trong cỏc kim loi Cu, Al, Fe, Ag, Au dn in ca kim loi c xp theo th t A Au, Al, Fe, Cu, Ag B Au, Ag, Al, Cu, Fe C Ag, Cu, Au, Al, Fe D Al, Ag, Au, Cu, Fe Cõu ... v MO X l: A Mg; 1,2 gam Mg v gam MgO B Ca; gam Ca v 2,8 gam CaO C Ba; 6,85 gam Ba v 7,65 gam BaO D Cu; 3,2 gam Cu v gam CuO Cõu 9: in phõn 200ml dung dch CuCl2 sau mt thi gan ngi ta thu c 1,12...
Ngày tải lên :
29/07/2014, 05:20