Molar Mass of AsH3O4 (Arsenic Acid)

Molar Mass Calculator

What is the molar mass of AsH₃O₄?

Answer

M(AsH₃O₄) =

141.942 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
Asarsenic	1	74.922	74.922 w ≈ 52.78%	≈ 52.78%
Hhydrogen	3	1.0080	3.0240 w ≈ 2.13%	≈ 2.13%
Ooxygen	4	15.999	63.996 w ≈ 45.09%	≈ 45.09%
Σ = 141.942 g/mol w = 100%				100%

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

Mass fractions of the elements

As 52.78%O 45.09%

H 2.13%

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Molar masses of substances nearby

Formula	M, g/mol
C₆H₁₂N₄ (methenamine)	140.190
Pr (praseodymium)	140.91
NaMnO₄ (sodium permanganate)	141.924
AsH₃O₄ (arsenic acid)	141.942
P₂O₅ (phosphorus pentoxide)	141.943
Na₂HPO₄ (dibasic sodium phosphate)	141.958
Na₂SO₄ (sodium sulfate)	142.04

FAQ

What is the molar mass of AsH3O4?

M(AsH₃O₄) = 141.942 g/mol

How to calculate the molar mass of AsH₃O₄?

Add up the atomic weights of all the atoms in the formula: 74.922 + 3 × 1.0080 + 4 × 15.999 = 141.942 g/mol.

How many grams are in 2 moles of AsH₃O₄?

m = n × M = 2 mol × 141.942 g/mol = 283.884 g.

See Also