Molar Mass of C3H8O2 ((RS)-propylene Glycol)

Molar Mass Calculator

What is the molar mass of C₃H₈O₂?

Answer

M(C₃H₈O₂) =

76.095 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Ccarbon	3	12.011	36.033 w ≈ 47.35%	≈ 47.35%
Hhydrogen	8	1.0080	8.0640 w ≈ 10.60%	≈ 10.60%
Ooxygen	2	15.999	31.998 w ≈ 42.05%	≈ 42.05%
Σ = 76.095 g/mol w = 100%				100%

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

Mass fractions of the elements

C 47.35%O 42.05%

H 10.60%

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Molar masses of substances nearby

Formula	M, g/mol
CoO (cobalt(II) oxide)	74.932
C₂H₅NO₂ (glycine)	75.067
N₂O₃ (dinitrogen trioxide)	76.011
C₃H₈O₂ ((RS)-propylene glycol)	76.095
CS₂ (carbon disulfide)	76.13
CH₃COONH₄ (ammonium acetate)	77.083
Al(OH)₃ (aluminum hydroxide)	78.003

FAQ

What is the molar mass of C3H8O2?

M(C₃H₈O₂) = 76.095 g/mol

How to calculate the molar mass of C₃H₈O₂?

Add up the atomic weights of all the atoms in the formula: 3 × 12.011 + 8 × 1.0080 + 2 × 15.999 = 76.095 g/mol.

How many grams are in 2 moles of C₃H₈O₂?

m = n × M = 2 mol × 76.095 g/mol = 152.190 g.

See Also