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Trang Ánh Nam

Trang Ánh Nam


Cho hỗn hợp gồm vinyl axetat, metyl axetat và etyl fomat. Đốt cháy hoàn toàn 3,08 gam X, thu được 2,16 gam H2O. Phần trăm số mol của vinyl axetat trong x là

Posted: 14 Sep 2020 09:20 AM PDT

Cho hỗn hợp gồm vinyl axetat, metyl axetat và etyl fomat. Đốt cháy hoàn toàn 3,08 gam X, thu được 2,16 gam H2O. Phần trăm số mol của vinyl axetat trong x là <!--[if !supportLists]-->A.  <!--[endif]-->25%           B. 27,92%          C.72,08%           D. 75% Giải: vinyl axetat: CH3COOCH=CH2; metyl axetat: CH3COOCH3; etyl fomat: HCOOC2H5. Bài này không khó chỉ lừa học sinh tí thôi, nếu viết

Bài tập Hóa 12 Este hay

Posted: 14 Sep 2020 08:52 AM PDT

 Hỗn hợp E gồm ba este mạch hở X,Y,Z trong đó có một este hai chức và hai este đơn chức, MX<MY<MZ. Cho 24,66 gam E tác dụng hoàn toàn với dung dịch NaOH dư, thu được hỗn hợp gồm các ancol no và 26,42 gam hỗn hợp muối của hai axit cacboxylic kế tiếp nhau trong dãy đồng đẵng. Khi đốt cháy hoàn toàn 24,66 gam E thì cần dùng 1,285 mol O2, thu được H2O và 1,09 mol CO2. Khối lượng của X trong 24,66 gam

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