Molar mass of lactic acid (C3H6O3)

The molar mass of lactic acid (C3H6O3) is 90.078 g/mol.

Step-by-step calculation

ElementAtomsAtomic massSubtotal
Carbon × 3 12.011 = 36.033
Hydrogen × 6 1.008 = 6.048
Oxygen × 3 15.999 = 47.997
Total90.078 g/mol

Percent composition by element

  • Carbon 40%
  • Hydrogen 6.71%
  • Oxygen 53.28%

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FAQ

What is the molar mass of C3H6O3?

The molar mass of lactic acid (C3H6O3) is 90.078 g/mol.

How do you calculate the molar mass of C3H6O3?

Multiply the atomic mass of each element by the number of its atoms in C3H6O3, then add the results: 3 × 12.011 (C) + 6 × 1.008 (H) + 3 × 15.999 (O) = 90.078 g/mol.

What percentage of C3H6O3 is Oxygen?

Oxygen makes up 53.28% of the mass of lactic acid (C3H6O3).