Molar Mass of H2SiO3 (Metasilicic Acid)

Molar Mass Calculator

What is the molar mass of H₂SiO₃?

Answer

M(H₂SiO₃) =

78.098 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 ≈ 2.58%	≈ 2.58%
Sisilicon	1	28.085	28.085 w ≈ 35.96%	≈ 35.96%
Ooxygen	3	15.999	47.997 w ≈ 61.46%	≈ 61.46%
Σ = 78.098 g/mol w = 100%				100%

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

Mass fractions of the elements

O 61.46%Si 35.96%

H 2.58%

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Molar masses of substances nearby

Formula	M, g/mol
Al(OH)₃ (aluminum hydroxide)	78.003
Na₂S (sodium sulfide)	78.04
CaF₂ (calcium fluoride)	78.074
H₂SiO₃ (metasilicic acid)	78.098
C₆H₆ (benzene)	78.114
Se (selenium)	78.971
NH₄HCO₃ (ammonium hydrogen carbonate)	79.055

FAQ

What is the molar mass of H2SiO3?

M(H₂SiO₃) = 78.098 g/mol

How to calculate the molar mass of H₂SiO₃?

Add up the atomic weights of all the atoms in the formula: 2 × 1.0080 + 28.085 + 3 × 15.999 = 78.098 g/mol.

How many grams are in 2 moles of H₂SiO₃?

m = n × M = 2 mol × 78.098 g/mol = 156.196 g.

See Also