... gm Fe, FeO, Fe3O4, Fe2O3.Cho hn hp rn ú tỏc dng dung dch HNO d thy thoỏt 1,12 lớt khớ NO (sn phm kh nht ktc ) Tớnh m v V? Cõu 38/ 2,52 gam Fe ngoi khụng khớ ta thu c gam hn hp gm Fe, FeO, Fe3O4, ... gam Fe khụng khớ sau mt thi gian ta thu c m gam hn hp gm Fe, FeO, Fe3O4, Fe2O3 Hũa tan hn hp ú bng dung dch H 2SO4 c,núng ta thu c 3,528 lớt khớ SO ktc Tớnh giỏ tr ca m? Cõu 33/ m gam Fe ngoi ... V lớt khớ NO( sn phm kh nht ktc ) Tớnh V? Cõu 35/ Kh lng Fe2O3 bng khớ H2 ta thu c 2,7 gam H 2O v m gam hn hp gm Fe, FeO, Fe3O4, Fe2O3 Hũa tan ht hn hp ú dung dch HNO ta thu c V lớt khớ NO(sn...