K3P , Cr2O

K3P is the chemical formula for potassium phosphide. It is an inorganic compound that is used as a source of phosphorus in various industries, including the production of pesticides and fertilizers.

Cr2O is the chemical symbol for chromium(II) oxide. It is an inorganic compound that is used as a catalyst in various chemical reactions. It is also used in the production of magnetic materials and as a pigment in ceramics.