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dtlinh408
2 năm trước
Cho 13,6 g hỗn hợp x gồm mg và Fe vào dung dịch H2 SO4 loãng thì thu được 6,72 l khí bay ra a) tính phần trăm khối lượng mỗi kim loại trong x b)nếu cho 6,8 g hỗn hợp x trên tác dụng với H2 SO4 đặc nóng tính tính thể tích SO2 điều kiện tiêu chuẩn
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