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Properties of HgO

Properties of HgO (Mercury(II) oxide):

Compound NameMercury(II) oxide
Chemical FormulaHgO
Molar Mass216.5894 g/mol

Chemical structure
HgO (Mercury(II) oxide) - Chemical structure
Lewis structure
3D molecular structure
Physical properties
AppearanceYellow or red solid
Odorodorless
Solubility0.053 g/100mL
Density11.1400 g/cm³
Helium 0.0001786
Iridium 22.562
Melting500.00 °C
Helium -270.973
Hafnium carbide 3958
Thermochemistry
Enthalpy of Formation-90.00 kJ/mol
Adipic acid -994.3
Tricarbon 820.06
Standard Entropy70.00 J/(mol·K)
Ruthenium(III) iodide -247
Chlordecone 764

Alternative Names

Mercuric oxide
Montroydite
Red mercury

Elemental composition of HgO
ElementSymbolAtomic weightAtomsMass percent
MercuryHg200.59192.6130
OxygenO15.999417.3870
Mass Percent CompositionAtomic Percent Composition
Hg: 92.61%O: 7.39%
Hg Mercury (92.61%)
O Oxygen (7.39%)
Hg: 50.00%O: 50.00%
Hg Mercury (50.00%)
O Oxygen (50.00%)
Mass Percent Composition
Hg: 92.61%O: 7.39%
Hg Mercury (92.61%)
O Oxygen (7.39%)
Atomic Percent Composition
Hg: 50.00%O: 50.00%
Hg Mercury (50.00%)
O Oxygen (50.00%)
Identifiers
CAS Number21908-53-2
SMILES[Hg]=O
Hill formulaHgO

Related compounds
FormulaCompound name
Hg2OMercury(I) oxide

Sample reactions for HgO
EquationReaction type
HgO = Hg + O2decomposition
HgO + Cl2 = HgCl + O2single replacement
HgO = Hg + Odecomposition
HGO = HG + O2decomposition
FeCl3 + HgO = HgCl2 + Fe2O3double replacement

Related
Molecular weight calculator
Oxidation state calculator

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