Ni2O3
The chemical formula for tellurium trioxide is TeO3.
The chemical with the formula N2O3 is called Dinitrogen trioxide.
Formula: Fe2O3
Formula: P2O3
The chemical formula for manganese trioxide is Mn2O3. This compound is composed of two manganese atoms and three oxygen atoms.
The chemical formula for dinitrogen trioxide is N2O3.
SO3 is the chemical formula for sulfur trioxide.
Formula: SO3
The chemical formula for Disilicon trioxide is Si2O3.
The formula for xenon trioxide is XeO3.
Formula: XeO3
Formula: SO3
The chemical formula for tellurium trioxide is TeO3.
Formula: B2O3
If Trioxide refers to Ozonide ion, the formula is O3-
Arsenic trioxide refers to Diarsenic trioxide = As2O3 . It is not to be confused as AsO3 which does not exists.
The correct formula for nitrogen trioxide is NO3.