Molar Mass of HMnO4 (Permanganic Acid)

Molar Mass Calculator

What is the molar mass of HMnO₄?

Answer

M(HMnO₄) =

119.942 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
Hhydrogen	1	1.0080	1.0080 w ≈ 0.84%	≈ 0.84%
Mnmanganese	1	54.938	54.938 w ≈ 45.80%	≈ 45.80%
Ooxygen	4	15.999	63.996 w ≈ 53.36%	≈ 53.36%
Σ = 119.942 g/mol w = 100%				100%

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

Mass fractions of the elements

O 53.36%Mn 45.80%

H 0.84%

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Molar masses of substances nearby

Formula	M, g/mol
Cl₂OS (thionyl chloride)	118.96
KBr (potassium bromide)	119.002
CHCl₃ (chloroform)	119.37
HMnO₄ (permanganic acid)	119.942
FeS₂ (ferrous disulfide)	119.97
NaH₂PO₄ (monosodium phosphate)	119.976
NaHSO₄ (sodium bisulfate)	120.05

FAQ

What is the molar mass of HMnO4?

M(HMnO₄) = 119.942 g/mol

How to calculate the molar mass of HMnO₄?

Add up the atomic weights of all the atoms in the formula: 1.0080 + 54.938 + 4 × 15.999 = 119.942 g/mol.

How many grams are in 2 moles of HMnO₄?

m = n × M = 2 mol × 119.942 g/mol = 239.884 g.

See Also