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thanhhangngole
2 năm trước
Cho 12 g hỗn hợp hai kim loại: Fe và Cu tác dụng với dd H2SO4 20%, thu được 2,24 lít khí H2 (ở đktc). a) Viết PT phản ứng. b) Tính khối lượng các chất có trong hỗn hợp. c) Tính khối lượng dd H2SO4 cần dùng. d) Tính nồng độ % của muối
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