Answer: Option (B) is the correct answer.
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 [tex]BaBr_{2}[/tex] as follows.
Molar mass = atomic mass of Ba + 2 [tex]\times atomic mass of Br[/tex]
= [tex]137.32 g/mol + 2 \times 79.90 g/mol[/tex]
= 297.12 g/mol
Therefore, we can conclude that molar mass of [tex]BaBr_{2}[/tex] is 297.1 g/mol.
