Molar Mass of K2O (Potassium Oxide)

Molar Mass Calculator

What is the molar mass of K₂O?

Answer

M(K₂O) =

94.195 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
Kpotassium	2	39.098	78.196 w ≈ 83.02%	≈ 83.02%
Ooxygen	1	15.999	15.999 w ≈ 16.98%	≈ 16.98%
Σ = 94.195 g/mol w = 100%				100%

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

Mass fractions of the elements

K 83.02%

O 16.98%

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Molar masses of substances nearby

Formula	M, g/mol
Nb (niobium)	92.906
C₆H₇N (aniline)	93.129
C₆H₆O (phenol)	94.113
K₂O (potassium oxide)	94.195
MgCl₂ (magnesium chloride)	95.21
CuS (copper monosulfide)	95.61
Mo (molybdenum)	95.95

FAQ

What is the molar mass of K2O?

M(K₂O) = 94.195 g/mol

How to calculate the molar mass of K₂O?

Add up the atomic weights of all the atoms in the formula: 2 × 39.098 + 15.999 = 94.195 g/mol.

How many grams are in 2 moles of K₂O?

m = n × M = 2 mol × 94.195 g/mol = 188.390 g.

See Also