1, Phai lay bn mol ptu CO2 de co 1,5. 10 mu 23 ptu CO2 ? 2,The tich 280g khi nito o dktc la ? 3,So ptu H2O co trong 1 giot nuoc ( 0,05) la ? 4,Trong 24g MgO co bn ptu Mgo ? 5,KL nuoc trong do co so ptu = so ptu co trong 20g NaOH la ? 6,Kl axit sunfuaric ( H2SO4) trong do co so ptu = so ptu co trong 11,2 l khi hidro h2 o dktc la ? 7,Phai lay bn lit khi CO2 o dktc de co 3,01.10 mu 23 ptu CO2 ? 8, 64g khi oxi o dktc co the tich la ? 9, 2 chat khi co the tich bang nhau ( do cung nhiet do va ap suat) la ? 10, Muon thu khi NH3 vao binh thi co the thu bang cach nao ? 11,Trong pu hoa hoc ,hat vi mo nao dc bao toan ? 12,Khi lam thi nghiem ,dung cap go kep ong nghiem, nguoi ta thuong kep o vi tri nao ? 13,Khi thuc hien 1 pu trong ong nghiem,neu can dun nong thi ung dung cu nao ? 14,Khi Co2 dc coi la anh huong den moi truong vi sao?