Which is the molar mass of bf3?
10.81 g/mol
29.81 g/mol
48.81 g/mol
67.81 g/mol

 The molar mass of BF3  is  67.81  g/mol

  Explanation

that is;

         atomic mass of B = 10.81 g/mol

         atomic  mass of F  = 19 g/mol

that's what i got you can count the number of atoms

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms