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Câu 7. Hòa tan hết 3,28g hỗn hợp X gồm Mg và Cu cần dùng 28ml dung dịch HNO3 aM(đặc, nóng) thì thu được 3,136 lit khí X (sản phẩm khử duy nhất, đkc). a. Viết phương trình phản ứng b. Tính % khối lượng từng kim loại (21,95%; 78,05%) c. Tính nồng độ mol/lít dung dịch HNO3 đã dùng (5M) d. Tính khối lượng muối có trong dung dịch

Sagot :

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Answer:

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