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dungtb1310
2 năm trước
nhiệt phân hoàn toàn 23,5 gam 1 muối x theo phương trình phản ứng r(no3)n=r2on+no2+o2. sau phản ứng thu được 7 lít hỗn hợp khí A ở đktc gồm no2 và o2 có tỉ khối với h2 là 21,6 tìm công thức của muối r(no3)n
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