Câu 2: Cho 13gram 1 kim loại kẽm phản ứng hoàn toàn với dunh dịch axit axetic CH3COOH có nồng độ 20% vừa đủ. a) Tính thể tích H2 sinh ra ở đktc b) Tính khối lượng dung dịch CH3COOH cần dùng cho phản ứng trên. (H=1, O=16, C=12, Zn=65)

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