Answer: Option (B) is the correct answer.
Step-by-step explanation:
Molar mass is defined as the sum of atomic mass of all the atoms present in a compound.
For example, atomic mass of barium (Ba) is 137.32 g/mol and atomic mass of a bromine atom is 79.90 g/mol.
Therefore, calculate molar mass of
as follows.
Molar mass = atomic mass of Ba + 2
![* atomic mass of Br](https://img.qammunity.org/2019/formulas/chemistry/middle-school/re0rib0qiptnwgduadohqqvs1u00d2eitb.png)
=
![137.32 g/mol + 2 * 79.90 g/mol](https://img.qammunity.org/2019/formulas/chemistry/middle-school/gnd1ju5spzsnrhuq8abyn5v5rj9plkyhpq.png)
= 297.12 g/mol
Therefore, we can conclude that molar mass of
is 297.1 g/mol.