What is the chemical name for the compound represented by SO3?

The chemical name for the compound represented by SO3 is sulfur trioxide. This designation arises from the systematic naming conventions used in chemistry, specifically within the realm of molecular compounds. In the compound SO3, sulfur (S) is bonded to three oxygen (O) atoms.

To construct the name, the prefix "tri-" is employed to indicate the presence of three oxygen atoms. Thus, combining this prefix with the name of the central element, sulfur, results in "sulfur trioxide." This name reflects both the identity of the elements involved and the quantity of oxygen present in the molecule.

The other choices do not correctly describe SO3. "Sulfur oxytree" is not a recognized nomenclature for any sulfur-oxygen compound. "Sulfur hexafluoride" refers to a different compound, SF6, involving sulfur and six fluorine atoms. "Sulfur dioxide" is the name for SO2, which features sulfur bonded to only two oxygen atoms. Therefore, sulfur trioxide (SO3) is the accurate and accepted name for the compound in question.