Molar mass of sulfur trioxide (SO3)

The molar mass of sulfur trioxide (SO3) is 80.057 g/mol.

Step-by-step calculation

ElementAtomsAtomic massSubtotal
Sulfur × 1 32.06 = 32.06
Oxygen × 3 15.999 = 47.997
Total80.057 g/mol

Percent composition by element

  • Sulfur 40.05%
  • Oxygen 59.95%

Try another formula

H2O NaCl CO2 C6H12O6 H2SO4 Ca(OH)2 CuSO4·5H2O C8H10N4O2

Could not read that formula

Related compounds

H2SO4 Sulfuric acid CuSO4 Copper(II) sulfate KAl(SO4)2·12H2O Potassium alum MgSO4 Magnesium sulfate SO2 Sulfur dioxide CuSO4·5H2O Copper(II) sulfate pentahydrate

FAQ

What is the molar mass of SO3?

The molar mass of sulfur trioxide (SO3) is 80.057 g/mol.

How do you calculate the molar mass of SO3?

Multiply the atomic mass of each element by the number of its atoms in SO3, then add the results: 1 × 32.06 (S) + 3 × 15.999 (O) = 80.057 g/mol.

What percentage of SO3 is Oxygen?

Oxygen makes up 59.95% of the mass of sulfur trioxide (SO3).