Molar Mass of K2S (Potassium Sulfide)

Molar Mass Calculator

What is the molar mass of K₂S?

Answer

M(K₂S) ≈

110.26 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
Kpotassium	2	39.098	78.196 w ≈ 70.92%	≈ 70.92%
Ssulfur	1	32.06	32.06 w ≈ 29.08%	≈ 29.08%
Σ = 110.256 ≈ 110.26 g/mol w = 100%				100%

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

Mass fractions of the elements

K 70.92%

S 29.08%

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Molar masses of substances nearby

Formula	M, g/mol
C₂H₅Br (bromoethane)	108.966
Li₂SO₄ (lithium sulfate)	109.94
C₆H₆O₂ (resorcin)	110.112
K₂S (potassium sulfide)	110.26
CaCl₂ (calcium chloride)	110.98
Cd (cadmium)	112.41
C₆H₅Cl (chlorobenzene)	112.56

FAQ

What is the molar mass of K2S?

M(K₂S) ≈ 110.26 g/mol

How to calculate the molar mass of K₂S?

Add up the atomic weights of all the atoms in the formula: 2 × 39.098 + 32.06 = 110.256 ≈ 110.26 g/mol.

How many grams are in 2 moles of K₂S?

m = n × M = 2 mol × 110.26 g/mol = 220.52 g.

See Also