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2 năm trước
Có a gam bột sắt để ngoài kk, sau một thời gian biến thành hh B khối lượng 24g gồm Fe, FeO, Fe2O3, Fe3O4. Cho hh B tác dụng vừa đủ 300ml dd axit HNO3 thu được 4,48l khí duy nhất NO(đktc). a, Viết các PTHH. Tính a. b, Tính CM của dd HNO3 Giúp mình với hứa vote 5 sao!!!
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