Mt hn hp X gm 2 kim loi kim A, B thuc 2 chu k k tip nhau.a) Nu cho X tc dng vi V1 lt dd HCl (axt va ) ri c cn thu c a gam hn hp mui khan, cn nu cho X tc dng va vi V2 lt dung dch axt sunphuric ri c cn th thu c b gam hn hp mui khan. Lp biu thc tnh tng s mol ca X theo a, b.b) Nu em X cho tc dng vi hn hp gm 1/2 V1 lt dd HCl v 1/2 V2 lt dd axt sunphuric (mt na V1 v V2) dng trn ri c cn th thu c c gam hn hp mui clorua v sunpht ca a v b. Lp biu thc tnh c theo a v b.c) Cho bit t l s mol ca A, B l 1:2 v b = 1,1807a. Hy cho bit tn 2 kim loi kim.d) Cho c = 45,25 gam. Tnh khi lng ca X dng v lng kt ta khi ha tan tr li c gam mui vo nc v cho tc dng vi bari clorua d.