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phuonganh1301nd
2 năm trước
Phân tích chất hữu cơ Y thấy % khối lượng các nguyên tố như sau 40 % C ; 6,67% H còn lại là O a Lập CTĐGN của Y b xác định CTPT của Y , biết Y có chứa 2 nguyên tử oxi
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