Well... you'll have to specify the oxidation state of copper. Is it +1 or +2 ? Is it copper(I) or copper (II)? Your pick. Depending on your choice, it may be CuO or Cu2O ... Which one is which, if oxygen in this compound, the oxide anion O2− , has an oxidation state of −2 ? read more
Copper(I) oxide has a formula of Cu2O. This means each molecule of copper(I) oxide has two atoms of copper and one atom of oxygen. This compound is also known as cuprous oxide. read more
Copper(I) oxide or cuprous oxide is the inorganic compound with the formula Cu 2 O. It is one of the principal oxides of copper, the other being CuO or cupric oxide. This red-coloured solid is a component of some antifouling paints. The compound can appear either yellow or red, depending on the size of the particles. read more
If you do not know, you should be able to google the chemical formula in this modern day and age. read more