12.18 Predict the major organic product from each of the following reactions. (a) O H (1) CH3MgBr (2) H3O (b) (2) NH4Cl, H2O (1) O MgBr (c) O OH O O MgBr (1 equiv.) H3O (2) (1) (d) O O (1) CH3CH2Li (excess) (2) NH4Cl, H2O

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.