Copper (II) Oxide

Copper (II) Oxide/Copper Monoxide
Formula: CuO
Colour: Black to brownish
Matter State: Solid-dust

Copper Oxide reacts with hydrochloric acid to make Copper Chloride

How humans use this compound .Copper Oxide is used as a pigment as a pigment in ceramics to make multiple different colours of glazes such as blue, red and green colours. It is also used as a non-pesticidal chemical in agriculture. It is also used to produce cuprammonium hydroxide which is used to make rayon.

Questions
Can Copper Oxide dissolve in water?
No. Copper Oxide is insoluble in water
What is the melting point of Copper Oxide
The melting point of Copper Oxide is 1,326 °C

Sources:
http://www.nanum.com.br/interna.php?area=produto&idIdioma=2&escolha=44
https://en.m.wikipedia.org/wiki/Copper(II)_oxide
https://pubchem.ncbi.nlm.nih.gov/compound/cupric_oxide#section=Use-and-Manufacturing
http://www.copper.org/resources/properties/compounds/other_compounds.html