> the molar mass of CoBr2 is
CoBr2 = 58.93 + 2 (79.90)
CoBr2 = 218.73 g/mol
> the molar mass of BeBr2 is
BeBr2 = 9.012 + 2 (79.90)
BeBr2 = 168.812 g/mol
> the molar mass of MgBr2 is
MgBr2 = 24.31 + 2 (79.90)
MgBr2 = 184.11 g/mol
> the molar mass of CdBr2 is
CdBr2 = 24.31 + 2 (79.90)
CdBr2 = 272.21 g/mol