Molar Mass of O3 (Ozone)

Molar Mass Calculator

What is the molar mass of O₃?

Answer

M(O₃) =

47.997 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

One O atom: M(O) = 15.999 g/mol; O₃ is three atoms.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Ooxygen	3	15.999	47.997 w = 100.00%	100.00%

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

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Molar Mass of O (Oxygen): Step by Step

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Molar masses of substances nearby

Formula	M, g/mol
CH₆N₂ (monomethylhydrazine)	46.073
HNO₂ (nitrous acid)	47.013
Ti (titanium)	47.867
O₃ (ozone)	47.997
SO (sulfur monoxide)	48.06
CH₃SH (methyl mercaptan)	48.10
NaCN (sodium cyanide)	49.008

FAQ

What is the molar mass of O3?

M(O₃) = 47.997 g/mol

How to calculate the molar mass of O₃?

Add up the atomic weights of all the atoms in the formula: 3 × 15.999 = 47.997 g/mol.

How many grams are in 2 moles of O₃?

m = n × M = 2 mol × 47.997 g/mol = 95.994 g.

See Also