The molecular mass of methyl ethanoate is 75.1 amu. calculate the molecular mass of propanoic acid, an isomer of methyl ethanoate. express your answer with the appropriate units.

Molecular Formula of Propanoic Acid is ...

C₃H₆O₂

Where;

Atomic Mass of C = 12

Atomic Mass of H = 1

Atomic Mass of O = 6

Substituting Atomic Masses in molecular formula,

(12) ₃ + (1) ₆ + (16) ₂

36 + 6 + 32

74 g/mol

Result:

Molecular Mass of Propanoic Acid is 74 g/mol. Structure of Methyl Ethanoate and Propanoic Acid are as follow,