The highest mass peaks in the mass spectrum of Br2 occur at m/z 158, 160, and 162. The ratio of intensities of these peaks is approximately 1:2:1. Bromine has two stable isotopes, 79Br (50.7% abundance) and 81Br (49.3% abundance). What molecular species gives rise to each of these peaks? (Include the mass numbers of the isotopes in your answers.)
m/z 158:
m/z 160:
m/z 162:

gas

explanation:

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water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.