... A 6,81 gam B 4,81 gam C 3,81 gam D 5,81 gam Cõu 50: Dóy gm cỏc kim loi c iu ch cụng nghip bng phng phỏp in phõn hp cht núng chy ca chỳng, l: A Na, Ca, Zn B Na, Ca, Al C Fe, Ca, Al D Na, Cu, Al ... cha hai mui sunfat) v khớ nht NO Giỏ tr ca a l A 0,06 B 0,04 C 0,075 D 0,12 Cõu 28: Hirat h a anken ch to thnh ancol (ru) Hai anken ú l A propen v but-2-en (hoc buten-2) B eten v but-1-en (hoc ... bit ba l b mt nhón, ta dựng thuc th l A CuO B Al C Cu D Fe Cõu 35: t chỏy hon ton a mol axit hu c Y c 2a mol CO2 Mt khỏc, trung h a a mol Y cn va 2a mol NaOH Cụng thc cu to thu gn ca Y l A CH3-COOH...