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Properties of Copper(II) oxide

Properties of Copper(II) oxide (CuO):

Compound NameCopper(II) oxide
Chemical FormulaCuO
Molar Mass79.5454 g/mol

Chemical structure
CuO (Copper(II) oxide) - Chemical structure
Lewis structure
3D molecular structure
Physical properties
Appearanceblack to brown powder
Solubilityinsoluble
Density6.3150 g/cm³
Helium 0.0001786
Iridium 22.562
Melting1,326.00 °C
Helium -270.973
Hafnium carbide 3958
Boiling2,000.00 °C
Helium -268.928
Tungsten carbide 6000
Thermochemistry
Enthalpy of Formation-156.00 kJ/mol
Adipic acid -994.3
Tricarbon 820.06
Standard Entropy43.00 J/(mol·K)
Ruthenium(III) iodide -247
Chlordecone 764

Alternative Names

Cupric oxide

Elemental composition of CuO
ElementSymbolAtomic weightAtomsMass percent
CopperCu63.546179.8865
OxygenO15.9994120.1135
Mass Percent CompositionAtomic Percent Composition
Cu: 79.89%O: 20.11%
Cu Copper (79.89%)
O Oxygen (20.11%)
Cu: 50.00%O: 50.00%
Cu Copper (50.00%)
O Oxygen (50.00%)
Mass Percent Composition
Cu: 79.89%O: 20.11%
Cu Copper (79.89%)
O Oxygen (20.11%)
Atomic Percent Composition
Cu: 50.00%O: 50.00%
Cu Copper (50.00%)
O Oxygen (50.00%)
Identifiers
CAS Number1317-38-0
SMILES[Cu]=O
SMILES[Cu+2].[O-2]
Hill formulaCuO

Related compounds
FormulaCompound name
Cu2OCopper(i) oxide
CuO2Copper peroxide
Cu2O3Copper(III) oxide

Sample reactions for CuO
EquationReaction type
CuO + H2SO4 = CuSO4 + H2Odouble replacement
CuO + H2 = Cu + H2Osingle replacement
Al + CuO = Al2O3 + Cusingle replacement
CuO + HCl = CuCl2 + H2Odouble replacement
CuO + C = Cu + CO2single replacement

Related
Molecular weight calculator
Oxidation state calculator

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