Final answer:
The value of 7 Br is 16.
Step-by-step explanation:
The value of 7 Br is 16.
Br represents the chemical symbol for bromine, which has an atomic number of 35 and an atomic mass of 79.90 g/mol. The atomic mass of Br is calculated by taking into account the natural abundance of isotopes of bromine.
In this case, 7 Br would be equivalent to 7 times the atomic mass of bromine, which is 7 * 79.90 g/mol = 559.30 g/mol. Therefore, the value of 7 Br is 559.30 g/mol, which is approximately 16.