... Xiderit: FeCO3 Pirit: FeS2 BI 33: HP KIM CA ST Gang: + Khỏi nim: Hp kim ca Fe v C (2- 5%); Nguyờn tc sn xut: Kh Fe2O3 bng CO nhit cao Thộp: + Khỏi nim: Hp kim ca st vi C(0.01- 2%); Nguyờn tc sn ... thu c 8,96 lit(kc) hn hp khớ X gm khớ NO v NO2 cú t hi hn hp X so vi oxi bng 1, 3125 Giỏ tr ca m l A 0,56 gam B 1 ,12 gam C 11,2 gam D 5,6 gam Cõu 31: Mt hn hp gm 13 gam km v 5,6 gam st tỏc dng ... Fe2O3 bng dd HCl thu c 1 ,12 lớt khớ (ktc) v dung dch A Cho dung dch A tỏc dng vi NaOH d, thu c kt ta Nung kt ta khụng khớ n lng khụng i c cht rn cú lng l: A 11,2 gam B 12, 4 gam C 15,2 gam D 10,9...