... Cõu 12: Cú cỏc cht sau: CH3COOH (1), CH3CH2COOH (2), HCOOCH3 (3), C2H5OH (4) Sp xp theo chiu tng dn nhit sụi ca cỏc cht trờn ln lt l: A (3) < (4) < (1) < (2) B (4) < (3) < (1) < (2) C (2) < (1) ... benzen (1), ancol benzylic (2), benzan ehit (3) v axit benzoic (4) Th t t ng d n nhi t sụi c a cỏc ch t trờn l A (2) < (3) < (1) < (4) B (2) < (3) < (4) < (1) C (1) < (2) < (3) < (4) D (1) < (3) ... i v s gam mu i l: A NaHS: 2,24 gam v Na2S: 12, 48 gam B NaHS: 2,25 gam v Na2S: 12, 58 gam C NaHS: 2,24 gam v Na2S: 12, 58 gam D NaHS: 2,25 gam v Na2S: 12, 68 gam Cõu 39: Cho 30,4 gam h n h p g m...