Simple: Sodium chloride
Sulfur hexafluoride is the stock system name for SF6.
The stock system name for the compound Mn2O7 is Manganese(VII) oxide.
The name of Fe2+ according to the Stock system is iron(II).
The stock system name for Hg2 is Mercury(I)ioxide.
The Stock system name for As2S5 is diarsenic pentasulfide.
The name of CuF2 in the Stock system is copper(II) fluoride.
The chemical name of CO using the stock system is carbon(II) oxide.
The chemical name of NaCl is sodium chloride.
In chemistry the stock system is a special way to form compounds. It is called Sulfur Trioxide.
manganese(VII) oxide
the Answer is Chromium VI oxide
Manganese VII oxide.