... gn ca X 42 V Duy Khụi Lun thc s khoa hc l A C3H 7CHO Chuyờn ngnh: Lớ Lun v PPDH b mụn Húa hc B HCHO C C2H 5CHO D C4H 9CHO 2 .114 Cho cỏc cht sau: CH3-CH2 -CHO( 1), CH2=CH -CHO( 2), (CH3)2CH -CHO( 3), CH2=CH-CH2-OH ... Khi lng v CTCT thu gn ca A, B X l A gam HCHO; 4,4 gam CH 3CHO B 18 gam HCHO; 8,8 gam CH 3CHO C 4,5 gam HCHO; 4,4 gam CH 3CHO D gam HCHO; 8,8 gam CH 3CHO 43 V Duy Khụi Lun thc s khoa hc Chuyờn ngnh: ... CH3-CH2 -CHO B CH2=CH-CH2 -CHO C HCC-CH2 -CHO D HCC -CHO 2.138 Cho 5,8 gam anehit Y tỏc dng ht vi Cu(OH) 2/NaOH un núng thu c 14,4 gam Cu2O CTCT ca Y l A CH 3CHO B HOC -CHO C CH3CH2 CHO D HCHO 2.139...