: Cho 4,05g kim loại Al vào dd H2SO4, sau phản ứng thu được 3,36 lít khí đktc. a. Tính khối lượng Al đó phản ứng ? b. Tính khối lượng muối thu được và khối lượng axit đó pư? c. Để hòa tan hết lượng Al còn dư cần phải dùng thêm bao nhiêu gam axit?

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