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Properties of FeO

Properties of FeO (Iron(II) oxide):

Compound NameIron(II) oxide
Chemical FormulaFeO
Molar Mass71.8444 g/mol

Chemical structure
FeO (Iron(II) oxide) - Chemical structure
Lewis structure
3D molecular structure
Physical properties
Appearanceblack crystals
Solubilityinsoluble
Density5.7450 g/cm³
Helium 0.0001786
Iridium 22.562
Melting1,377.00 °C
Helium -270.973
Hafnium carbide 3958
Boiling3,414.00 °C
Helium -268.928
Tungsten carbide 6000

Alternative Names

Ferrous oxide, Iron monoxide, Wüstite

Elemental composition of FeO
ElementSymbolAtomic weightAtomsMass percent
IronFe55.845177.7305
OxygenO15.9994122.2695
Mass Percent CompositionAtomic Percent Composition
Fe: 77.73%O: 22.27%
Fe Iron (77.73%)
O Oxygen (22.27%)
Fe: 50.00%O: 50.00%
Fe Iron (50.00%)
O Oxygen (50.00%)
Mass Percent Composition
Fe: 77.73%O: 22.27%
Fe Iron (77.73%)
O Oxygen (22.27%)
Atomic Percent Composition
Fe: 50.00%O: 50.00%
Fe Iron (50.00%)
O Oxygen (50.00%)
Identifiers
CAS Number1345-25-1
SMILES[Fe]=O
Hill formulaFeO

Related compounds
FormulaCompound name
FeO2Iron(II) peroxide
Fe2O3Iron(III) oxide
Fe3O4Iron(ii,iii) oxide
Fe2(O2)3Iron(III) peroxide

Sample reactions for FeO
EquationReaction type
Al + FeO = Al2O3 + Fesingle replacement
FeO + O2 = Fe2O3synthesis
FeO + PdF2 = FeF2 + PdOdouble replacement
FeO + C = Fe + CO2single replacement
FeO + CO = Fe + CO2double replacement

Related
Molecular weight calculator
Oxidation state calculator

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