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lethuthao7220
2 năm trước
Câu 27. (1,5 điểm) Cho 8,0 gam hỗn hợp A gồm Mg và Fe, tác dụng với dung dịch HCl dư. Sau phản ứng thu được 4,48 lít khi H2; (dktc). Hãy: a. Viết các phương trình phản ứmg hoá học xảy ra. b. Tính thành phẩn % theo khối lượng mỗi kim loại trong hỗn hợp ban đầu.(Biết Ntk: Mg =24, Fe=56) Mọi người ơi, giúp em với ạ, e cần gấp
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