... dựng l (chng 6/bi 26/chung/mc 3) A 115ml B 120 ml C 125 ml D 130ml ỏp ỏn: B Cõu 70: 1,78 gam hn hp hai kim loi húa tr II tan hon ton dung dch H 2SO4 loóng, gii phúng c 0,896 lớt H2 (ktc) Khi lng hn ... (chng 7/bi 32/chung/mc 1) A Fe2O3 tỏc dng vi nc B mui st (III) tỏc dng vi dung dch axit mnh C Fe2O3 tỏc dng vi dung dch NaOH va D mui st (III) tỏc dng vi dung dch NaOH ỏp ỏn: D Cõu 203: Cho s phn ... ỏn: B 10 Cõu 67: Ho tan ht 0,5 gam hn hp Fe v kim loi hoỏ tr II bng dung dch H2SO4 loóng, thu c 1 ,12 lớt H2 (ktc) Kim loi hoỏ tr II l (chng 6/bi 26/chung/mc 3) A Be B Mg C Ca D Ba ỏp ỏn: A Cõu...