Molar Mass of HgO (Mercury(II) Oxide)

Molar Mass Calculator

What is the molar mass of HgO?

Answer

M(HgO) ≈

216.59 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — Hg: 200.59.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Hgmercury	1	200.59	200.59 w ≈ 92.61%	≈ 92.61%
Ooxygen	1	15.999	15.999 w ≈ 7.39%	≈ 7.39%
Σ = 216.589 ≈ 216.59 g/mol w = 100%				100%

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

Mass fractions of the elements

Hg 92.61%

O 7.39%

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Molar masses of substances nearby

Formula	M, g/mol
K₃PO₄ (tribasic potassium phosphate)	212.264
Al(NO₃)₃ (aluminum nitrate)	212.994
KIO₃ (potassium iodate)	214.00
HgO (mercury(II) oxide)	216.59
Mn₂O₇ (manganese heptoxide)	221.869
C₃H₆N₆O₆ (cyclonite)	222.117
PbO (lead(II) oxide)	223.2

FAQ

What is the molar mass of HgO?

M(HgO) ≈ 216.59 g/mol

How to calculate the molar mass of HgO?

Add up the atomic weights of all the atoms in the formula: 200.59 + 15.999 = 216.589 ≈ 216.59 g/mol.

How many grams are in 2 moles of HgO?

m = n × M = 2 mol × 216.59 g/mol = 433.18 g.

See Also