Make up the formulas of the substances and indicate the oxidation states of non-metals. Iron (III) oxide, carbon (II) oxide

Make up the formulas of the substances and indicate the oxidation states of non-metals. Iron (III) oxide, carbon (II) oxide, potassium oxide, silicic acid, copper (II) hydroxide, zinc, sulfur.

Iron (III) oxide – Fe2O3; oxidation state of iron = +3, oxygen = -2.
carbon monoxide (II) – CO; oxidation state of carbon = +2, oxygen = -2.
potassium oxide – K2O; oxidation state of potassium = +1, oxygen = -2.
silicic acid – H2SiO3; the oxidation state of hydrogen = +1, oxygen = -2, and silicon = + 4.
copper (II) hydroxide – Cu (OH) 2; oxidation state of copper = +2, hydroxyl group (OH) = -1, but in the hydroxy group itself oxygen = -4.
Zinc -Zn °
sulfur –S °