Bài 2: Các ion A2+, B+ , X-
, Y2- đều có cấu hình electron của khí hiếm Ar (Z =18). Viết cấu hình e của
nguyên tử ứng với các ion trên. Xác định các nguyên tố A, B, X, Y.

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.