To find the molar mass of C3H8O2, we must first determine the atomic masses of each element present in the compound. The atomic mass of carbon (C) is approximately 12.01 grams per mole (g/mol), the atomic mass of hydrogen (H) is approximately 1.01 g/mol, and the atomic mass of oxygen (O) is approximately 16.00 g/mol.

Now, let's calculate the molar mass of C3H8O2:

Molar mass = (3 × atomic mass of C) + (8 × atomic mass of H) + (2 × atomic mass of O)

Molar mass = (3 × 12.01 g/mol) + (8 × 1.01 g/mol) + (2 × 16.00 g/mol)

Molar mass ≈ 76.09 g/mol

Therefore, the molar mass of C3H8O2 is approximately 76.09 grams per mole.