Molar Mass of H2Se (Hydrogen Selenide)

Molar Mass Calculator

What is the molar mass of H₂Se?

Answer

M(H₂Se) =

80.987 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	2	1.0080	2.0160 w ≈ 2.49%	≈ 2.49%
Seselenium	1	78.971	78.971 w ≈ 97.51%	≈ 97.51%
Σ = 80.987 g/mol w = 100%				100%

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

Mass fractions of the elements

Se 97.51%

H 2.49%

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Molar masses of substances nearby

Formula	M, g/mol
NH₄NO₃ (ammonium nitrate)	80.043
SO₃ (sulfur trioxide)	80.06
HBr (hydrogen bromide)	80.912
H₂Se (hydrogen selenide)	80.987
ZnO (zinc oxide)	81.38
H₃PO₃ (phosphonic acid)	81.995
CH₃COONa (sodium acetate)	82.034

FAQ

What is the molar mass of H2Se?

M(H₂Se) = 80.987 g/mol

How to calculate the molar mass of H₂Se?

Add up the atomic weights of all the atoms in the formula: 2 × 1.0080 + 78.971 = 80.987 g/mol.

How many grams are in 2 moles of H₂Se?

m = n × M = 2 mol × 80.987 g/mol = 161.974 g.

See Also