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2 năm trước
(ghi cách giải ạ) Giúp với, mình đang cần gấp. Cảm ơn mn! Khi thủy phân 5,475 gam este của axit 2 chức với ancol đơn chức cần 4,2 gam KOH và thu được 6,225 gam muối. Công thức phân tử của este đó là : A. CH2(COOC2H5)2 B. (COOCH3)2 C. (COOC2H5)2 D. C2H2(COOCH3)2
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