... 1, 576 D 2,364 - HT - 1A 11 D 21B 31C 41B 2C 12 D 22B 32A 42D 3D 13 A 23C 33B 43C P N 5D 6D 15 B 16 A 25A 26C 35C 36B 45C 46B 4D 14 D 24A 34A 44C 7A 17 D 27A 37B 47C 8B 18 A 28D 38B 48B 9B 19 B ... = n OH = n H+ = 0 ,1. 2 + 0, 2.0,5.2 = 0, Vỡ CKOH n KOH = 0,3 M = NaOH CM n NaOH = 0 ,1 X = 13 3 %N = BTKL 0 ,1. X + 0 ,1. 98 + 0 ,1. 40 + 0,3.56 = 36, + 0, 4 .18 14 = 10 ,526% 13 3 Cõu 45.Chn ỏp ỏn ... Y Nng ca MgSO4 dung dch Y l 15 ,22% Nng % ca ZnSO4 dung dch Y l : A 10 , 21% B 18 , 21% C 15 ,22% D 15 ,16 % Cõu 25 Cho m gam bt Cu vo 400 ml dung dch AgNO3 0,2M, sau mt thi gian phn ng thu c 7,76 gam...