... s 27 28 29 30 31 32 33 34 35 36 37 38 39 ỏp ỏn B C B B A A B B D B B A B Cõu s 40 41 42 43 44 45 46 47 48 49 50 ỏp ỏn D C A D B B C A C B D Cõu s 27 28 29 30 31 32 33 34 35 36 37 38 39 ỏp ỏn A ... 15 16 17 18 19 20 21 22 23 24 25 26 ỏp ỏn A B D C C D D D B D A B C Cõu s 27 28 29 30 31 32 33 34 35 36 37 38 39 ỏp ỏn A C C B A A D B C C D D C Cõu s 40 41 42 43 44 45 46 47 48 49 50 ỏp ỏn B ... Hũa tan 9, 14g hn hp Cu, Mg, Fe bng mt lng d dung dch HCl thu c 7,84 lớt khớ A (ktc), 2,54g cht rn B v dung dch C Cụ cn dung dch C thu c m(g) mui, m cú giỏ tr l: A 31,45 B 33,25 C 39, 49 D 35,58...