Molar Mass of BaO2 (Barium Peroxide)

Molar Mass Calculator

What is the molar mass of BaO₂?

Answer

M(BaO₂) ≈

169.33 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — Ba: 137.33.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Babarium	1	137.33	137.33 w ≈ 81.10%	≈ 81.10%
Ooxygen	2	15.999	31.998 w ≈ 18.90%	≈ 18.90%
Σ = 169.328 ≈ 169.33 g/mol w = 100%				100%

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

Mass fractions of the elements

Ba 81.10%

O 18.90%

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Molar masses of substances nearby

Formula	M, g/mol
Tm (thulium)	168.93
C₃H₈NO₅P (glyphosate)	169.073
C₈H₁₁NO₃	169.180
BaO₂ (barium peroxide)	169.33
BaS (barium sulfide)	169.39
AgNO₃ (silver nitrate)	169.87
Ba(OH)₂ (barium hydroxide)	171.34

FAQ

What is the molar mass of BaO2?

M(BaO₂) ≈ 169.33 g/mol

How to calculate the molar mass of BaO₂?

Add up the atomic weights of all the atoms in the formula: 137.33 + 2 × 15.999 = 169.328 ≈ 169.33 g/mol.

How many grams are in 2 moles of BaO₂?

m = n × M = 2 mol × 169.33 g/mol = 338.66 g.

See Also