Molar Mass of COS (Carbonyl Sulfide)

Molar Mass Calculator

What is the molar mass of COS?

Answer

M(COS) =

60.07 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	1	12.011	12.011 w ≈ 20.00%	≈ 20.00%
Ooxygen	1	15.999	15.999 w ≈ 26.63%	≈ 26.63%
Ssulfur	1	32.06	32.06 w ≈ 53.37%	≈ 53.37%
Σ = 60.07 g/mol w = 100%				100%

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

Mass fractions of the elements

S 53.37%

O 26.63%C 20.00%

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Molar masses of substances nearby

Formula	M, g/mol
C₃H₉N (isopropylamine)	59.112
CH₃COOH (acetic acid)	60.052
CH₄N₂O (urea)	60.056
COS (carbonyl sulfide)	60.07
SiO₂ (silicon dioxide)	60.083
C₃H₇OH (propyl alcohol)	60.096
C₂H₈N₂ (ethylenediamine)	60.100

FAQ

What is the molar mass of COS?

M(COS) = 60.07 g/mol

How to calculate the molar mass of COS?

Add up the atomic weights of all the atoms in the formula: 12.011 + 15.999 + 32.06 = 60.07 g/mol.

How many grams are in 2 moles of COS?

m = n × M = 2 mol × 60.07 g/mol = 120.14 g.

See Also