Molar mass of O2 is 31.99880 ± 0.00060 g/mol
Compound name is oxygen
Elemental composition of O2
Sample reactions for O2
Formula in Hill system is O2
Computing molar mass (molar weight)To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use:
Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa.
Computing molecular weight (molecular mass)To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.
Examples of molecular weight computations: CO2, SO2.
Definitions of molecular mass, molecular weight, molar mass and molar weight
Related: Molecular weights of amino acids
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