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

 Molar mass   is the  mass  of all  atoms  in a molecule  in gram per  mole.molar mass  of a molecule is calculated by adding  atomic mass  of constituent  atomuse the periodic table  to determine the atomic mass of each element in the  molecule.

that is;

         atomic mass of B = 10.81 g/mol

         atomic  mass of F  = 19 g/mol

since there 3 atoms  of F  in BF3 the  atomic massof F in BF3=  3 x19  =  57 g/moltotal molar  mass of BF3 = 10.81 g/mol + 57 g/mol = 67.81  g/mol

The answer for this question is d. none of these

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.