Write the molecular formula of the following compounds of Sulphur trioxide.
Find the number and names of elements present in them and calculate their molecular masses.
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Solution
Sulphur trioxide
- A molecule of sulphur trioxide is represented by the formula SO3.
- The elements present in it are sulphur dioxide and oxygen.
- One molecule of sulphur trioxide has one atom of sulphur and three atoms of oxygen.
- Molecular mass of sulphur trioxide (SO3)
= 32 + 3 x 16
= 32 + 48 = 80 amu.
Concept: Formulae of Compounds
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