87) Hydrogen and chlorine both have two naturally occurring isotopes: 1H (1.0078 amu; 99.985 percent abudundance) and 2H (2.01410; 0.015 percent abundance), 35Cl (34.969 amu; 75.53 percent abundance) and 37Cl (36.966 amu; 24.47 percent abundance). a) How many peaks would be expected in a mass spectrum of HCl(g)? b) At what molecular weights will peaks be observed? C) What should be the relative intensities of the peaks?