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cmanhh
2 năm trước
Hòa tan hoàn toàn m gam hỗ hợp X gồm Fe, Cu, Ag vào HNO3 dư thu được dung dịch Y chỉ chứa 3 chất tan của kim loại, đồng thời thu được 11,648 lít hỗn hợp Z gồm NO và NO2 có tỉ khối so với H2 là 21,4. Cho NH3 dư vào 1/2 dung dịch Y, lọc lấy kết tủa rồi nung đến khối lượng không đổi thu được 4 gam chất rắn. Điện phân 1/2 dung dịch Y với điện cực trơ tới khi dung dịch vừa hết ion Cu2+ thì khối lượng catot tăng 9,128g. 1. Tính điện lượng chạy qua dung dịch khi điện phân? 2. Tính số g mỗi kim loại có trong m gam X? Cảm ơn mọi người đã giúp em~
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