... D 2 25 linh ng ca nguyờn t hiro nhúm OH ca cỏc cht: H 2O, C2H5OH, C6H5OH bin i theo quy lut no sau õy? A H2O > C2H5OH > C6H5OH B C2H5OH > H2O > C6H5OH C C6H5OH > H2O > C2H5OH D C2H5OH > C6H5OH ... S = 32; Cl = 35, 5; K = 39; Ca = 40; Fe = 56 ; Cu = 64; Zn = 65; As = 75 ; Br = 80; Rb = 85, 5; Ag = 108; Ba = 137 S 25 201 Mt nguyờn t X cú tng s ht proton, ntron v electron l 155 ht ú s ht mang ... dung dch Br2 0,5M (dung mụi CCl4) thy dung dch mt mu hon ton, khớ i bỡnh chim th tớch 5, 5 lớt o 25 oC v 760 mmHg Khi lng sn phm cng brom l A 25, 95 gam B 23, 25 gam C 17, 95 gam D 14, 75 gam 42 Cú...