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meme0509
2 năm trước
Cho hỗn hợp gồm Fe và Zn tác dụng với dung dịch HNO3 đặc nguội thu được 0,896l màu nâu ở đktc . Mặt khác, nếu cho hỗn hợp trên tác dụng với dung dịch HCl 10% thu được 0,672lít khí ở đktc . a) tính% khối lượng mỗi kim loại hỗn hợp trên b) tính khối lượng dung dịch HCl cần dùng
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