Ngày tải lên :
08/09/2013, 20:10
... thoỏt Tr s ca b l: A 9,0 gam B 8,0 gam C 6,0 gam D 12 gam Cõu 11: Tr s ca a gam FexOy cõu 10 l: A 1,08 gam B 2,4 gam C 4,64 gam D 3,48 gam Cõu 12: Cụng thc ca FexOy cõu (10) l: A FeO B Fe2O3 C ... bao nhiờu gam cht rn khan? A 56,7375 gam B 32,04 gam C 47,3925 gam D 75,828 gam Cõu 11: Khi cho 17,4 gam hp kim Y gm st, ng, nhụm phn ng ht vi H2SO4 loóng d ta c dung dch A; 6,4 gam cht rn; 9,856 ... 7,74 gam mt hn hp gm Mg, Al bng 500 ml dung dch gm H 2SO4 0,28M v HCl 1M thu c 8,736 lớt H2 (ktc) v dung dch X S gam mui thu c dung dch X l: a 38,93 gam b 38,95 gam c 38,97 gam d 38,91 gam Câu...