[" What volume of chlorine can be prodused from "1" gof sodium chloride under standard "],[" conditions of temperature and pressure? "],[" 74.If the wavelength of first line of the Balmer series of hydrogen atom is "656.1nm" ,the "],[" wavelength of second line of this series would be: "],[" 75.The energy of second Bohr orbit of the hydrogen atom is "-328kJmol^(-1)" ,hence the "]