What is the molecular mass of potassium hydrogen carbonate (khco3)? a. 68 g/mol b. 84 g/mol c. 100 g/mol d. 116 g/mol

Molecular mass of is 100 g.

Explanation:

Molecular mass of a molecule is the summation of atomic masses of all constituting atoms.

Molecular mass of  = (Atomic mass of K)+(Atomic mass of H)+(Atomic mass of C)+ (Atomic mass of O)

So, molecular mass of = (39 g)+(1 g)+ (12 g)+( 16 g) = 100 g

it is b that is the answer.