bài tập 10 : Cho 65g kim loại Kẽm tác dụng với Axit Clohidric (HCl) thu được 136g muối kẽm Clorua (ZnCl2) và 2g khí hidro (H2). a. Lập phương trình hóa học của phản ứng. b. Viết công thức về khối lượng của các chất có trong phương trình trên. c. Tính khối lượng axit clohidric đã dùng.

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