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Properties of MnO

Properties of MnO (Manganese(II) oxide):

Compound NameManganese(II) oxide
Chemical FormulaMnO
Molar Mass70.937445 g/mol
Physical properties
Appearancegreen crystals or powder
Solubilityinsoluble
Density5.4300 g/cm³
Helium 0.0001786
Iridium 22.562
Melting1,945.00 °C
Helium -270.973
Hafnium carbide 3958
Thermochemistry
Enthalpy of Formation-385.00 kJ/mol
Adipic acid -994.3
Tricarbon 820.06
Standard Entropy60.00 J/(mol·K)
Ruthenium(III) iodide -247
Chlordecone 764

Alternative Names

Manganous oxide
Manganosite
manganese monoxide
oxomanganese

Elemental composition of MnO
ElementSymbolAtomic weightAtomsMass percent
ManganeseMn54.938045177.4458
OxygenO15.9994122.5542
Mass Percent CompositionAtomic Percent Composition
Mn: 77.45%O: 22.55%
Mn Manganese (77.45%)
O Oxygen (22.55%)
Mn: 50.00%O: 50.00%
Mn Manganese (50.00%)
O Oxygen (50.00%)
Mass Percent Composition
Mn: 77.45%O: 22.55%
Mn Manganese (77.45%)
O Oxygen (22.55%)
Atomic Percent Composition
Mn: 50.00%O: 50.00%
Mn Manganese (50.00%)
O Oxygen (50.00%)
Identifiers
CAS Number1344-43-0
SMILES[Mn+2].[O-2]
Hill formulaMnO

Related compounds
FormulaCompound name
MnO2Manganese(IV) oxide
Mn2O3Manganese(III) oxide
Mn2O7Manganese(VII) oxide
Mn3O4Manganese(II,III) oxide

Sample reactions for MnO
EquationReaction type
Al + MnO = Al2O3 + Mnsingle replacement
K2O + MnO + O2 = KMnO4synthesis
MnO + HCl = MnCl2 + H2Odouble replacement
O2 + MnO = Mn3O4synthesis

Related
Molecular weight calculator
Oxidation state calculator

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