Molar Mass of H2O2 (Hydrogen Peroxide)

Molar Mass Calculator
Chemical formula Write symbols with a capital letter: CoCl2 is cobalt chloride, COCl2 is phosgene. A hydrate takes a dot: CuSO4·5H2O or CuSO4.5H2O

What is the molar mass of H2O2?

Answer

M(H2O2) =
34.014 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
Hhydrogen21.00802.0160 w ≈ 5.93%
Ooxygen215.99931.998 w ≈ 94.07%
Σ = 34.014 g/mol w = 100%

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

Mass fractions of the elements

H 5.93%

Related Calculations

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Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
N₂H₄ (hydrazine)32.046
S (sulfur)32.06
PH₃ (phosphine)33.998
H₂O₂ (hydrogen peroxide)34.014
CH₃F (fluoromethane)34.033
H₂S (hydrogen sulfide)34.08
NH₄OH35.046

FAQ

What is the molar mass of H2O2?

M(H₂O₂) = 34.014 g/mol

How to calculate the molar mass of H₂O₂?

Add up the atomic weights of all the atoms in the formula: 2 × 1.0080 + 2 × 15.999 = 34.014 g/mol.

How many grams are in 2 moles of H₂O₂?

m = n × M = 2 mol × 34.014 g/mol = 68.028 g.

See Also