The molar mass of Br2 (bromine) is 159.808 g/mol. This value is calculated by adding the atomic masses of the two bromine atoms in the molecule. The atomic mass of a single bromine atom is approximately 79.904 g/mol. Since Br2 consists of two bromine atoms, you multiply the atomic mass of one bromine atom by two:
79.904 g/mol × 2 = 159.808 g/mol
This calculation gives the molar mass of Br2, which is essential for various chemical calculations, including stoichiometry and concentration determinations.