In chemistry the stock system is a special way to form compounds. It is called Sulfur Trioxide.
SO3 is sulfur trioxide.
Ax3e3
Sulfur trioxide
Sulfur Dioxide is the common name for SO3.
Formula: SO3
Manganese Sulphate
SO3 is the chemical formula for sulfur trioxide.
Formula: SO3
SO3-2 is the polyatomic ion sulfite.
So3 -2
Manganese(VI) Sulfite
SO3 = sulphur dioxide O2= oxygen SO3 = sulphur trioxide SO3- = sulphite that should be it .... right? :)