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Sulfur trioxide is a compound.
There is 1 molecule of sulfur in sulfur trioxide so there is 1 mole of sulfur in 1 mole of sulfur trioxide
There are two elements present in sulfur trioxide, which are: Sulfur and Oxygen.
The following formula represents sulfur trioxide: SO3
As there is one atom of sulfur and three atoms of oxygen (trioxide).
No, Sulfur trioxide is a colourless gas
Sulfur Trioxide, it's a compound of sulfur and oxygen