Molar Mass of HF (Hydrogen Fluoride)

Molar Mass Calculator

What is the molar mass of HF?

Answer

M(HF) =

20.006 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

Hf (hafnium) is a different substance: M(Hf) = 178.49 g/mol.

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 ≈ 5.04%	≈ 5.04%
Ffluorine	1	18.998	18.998 w ≈ 94.96%	≈ 94.96%
Σ = 20.006 g/mol w = 100%				100%

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

Mass fractions of the elements

F 94.96%

H 5.04%

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Molar masses of substances nearby

Formula	M, g/mol
NH₃ (ammonia)	17.031
H₂O (water)	18.015
F (fluorine)	18.998
HF (hydrogen fluoride)	20.006
Ne (neon)	20.180
Na (sodium)	22.990
LiOH (lithium hydroxide)	23.95

FAQ

What is the molar mass of HF?

M(HF) = 20.006 g/mol

How to calculate the molar mass of HF?

Add up the atomic weights of all the atoms in the formula: 1.0080 + 18.998 = 20.006 g/mol.

How many grams are in 2 moles of HF?

m = n × M = 2 mol × 20.006 g/mol = 40.012 g.

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