Calculate the wavelength in nanometers, of the spectral line produced when an electron in a hydrogen undergoes the transition from the energy level n = 5 to the level n = 1.

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.