... bờn anot lỳc t1 = 200s v t2 = 300s a) catot:0 ;112 ml; anot :112 ;168ml c) catot:0 ;112 ml; anot:56 ;112 ml b) catot :112 ;168ml; anot:56;84ml d) catot:56 ;112 ml; anot:28;56ml Cõu 8:in phõn 100ml dung dch ... thu c 10,2 gam oxit M2O3 Tỡm tờn kim loi M Cõu : A l nguyờn t chu kỡ 3.Hp cht ca A vi cacbon cha 25 % cacbon v lng ,v lng phõn t ca hp cht l 144 u.nh tờn nguyờn t A,cụng thc phõn t ca hp cht ... proton,electron v ntron l 28 ú s ht mang in bng 2,5 ln s ht khụng mang in a)Xỏc nh in tớch ht nhõn v s ca A,X,Y b)Xỏc nh v trớ ca A,B,X bng tun hon Cõu 19 : Cú hp cht MX3 ú : Tng s proton, ntron, elctron...