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    Molar Mass of B2O3 (Diboron Trioxide)

    Molar Mass Calculator
    Chemical formula

    What is the molar mass of B2O3?

    Answer

    M(B2O3) ≈
    69.62 g/mol

    Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — B: 10.81.

    Contribution of each element
    Element Atoms, n Atomic weight, A n × A, g/mol Mass fraction, w
    Bboron210.8121.62 w ≈ 31.06%
    Ooxygen315.99947.997 w ≈ 68.94%
    Σ = 69.617 ≈ 69.62 g/mol w = 100%

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

    Mass fractions of the elements

    B 31.06%

    Related Calculations

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    Molar Mass of B2O3 (Diboron Trioxide): Step by Step. M(B2O3) ≈ 69.62 g/mol: 2 × 10.81 (B) + 3 × 15.999 (O). Mass fractions: O 68.94%, B 31.06%.
    https://calculat.io/en/other/molar-mass/b2o3/generated.jpgCopy

    Molar masses of substances nearby

    FormulaM, g/mol
    (NH₄)₂S (ammonium sulfide)68.14
    LiNO₃ (lithium nitrate)68.94
    NaNO₂ (sodium nitrite)68.995
    B₂O₃ (diboron trioxide)69.62
    Ga (gallium)69.723
    C₅H₁₀ (cyclopentane)70.135
    Cl₂ (chlorine)70.90
    Recalculate with different values ↑

    FAQ

    What is the molar mass of B2O3?

    M(B₂O₃) ≈ 69.62 g/mol

    How to calculate the molar mass of B₂O₃?

    Add up the atomic weights of all the atoms in the formula: 2 × 10.81 + 3 × 15.999 = 69.617 ≈ 69.62 g/mol.

    How many grams are in 2 moles of B₂O₃?

    m = n × M = 2 mol × 69.62 g/mol = 139.24 g.

    See Also