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1,cho $0.87g$ hon hop gom $Fe,Cu,Al$ vao binh dung $300ml$ dd $H_2S0_4$ 0,1M sau khi cac phan ung xay ra hoan toan thu duoc $0,32g$ chat ran co $448ml$ (dktc) khi thoat ra .them tiep vao $0,425g$ $NaN0_3$ khi cac phan ung ket thuc thi the tich khi $N0$ (dktc) tao thanh va khoi luong muoi trong dd la?
2,nung $6.58g$ $Cu(N0_3)_2$ trong binh kin khong chua khong khi sau $1$ thoi gian thu dc $4.96g$ chat ran va hon hop khi $X$ .hap thu hoan toan $X$ vao nuoc de dc $300ml$ dd $Y$.dd $Y$ co pH bang
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