Molar Mass of CH3SH (Methyl Mercaptan)

Molar Mass Calculator

What is the molar mass of CH₃SH?

Answer

M(CH₃SH) ≈

48.10 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — S: 32.06.

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 ≈ 24.97%	≈ 24.97%
Hhydrogen	4	1.0080	4.0320 w ≈ 8.38%	≈ 8.38%
Ssulfur	1	32.06	32.06 w ≈ 66.65%	≈ 66.65%
Σ = 48.103 ≈ 48.10 g/mol w = 100%				100%

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

Mass fractions of the elements

S 66.65%

C 24.97%H 8.38%

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Molar masses of substances nearby

Formula	M, g/mol
Ti (titanium)	47.867
O₃ (ozone)	47.997
SO (sulfur monoxide)	48.06
CH₃SH (methyl mercaptan)	48.10
NaCN (sodium cyanide)	49.008
V (vanadium)	50.942
Cr (chromium)	51.996

FAQ

What is the molar mass of CH3SH?

M(CH₃SH) ≈ 48.10 g/mol

How to calculate the molar mass of CH₃SH?

Add up the atomic weights of all the atoms in the formula: 12.011 + 4 × 1.0080 + 32.06 = 48.103 ≈ 48.10 g/mol.

How many grams are in 2 moles of CH₃SH?

m = n × M = 2 mol × 48.10 g/mol = 96.20 g.

See Also