Molar Mass of CoO (Cobalt(II) Oxide)

Molar Mass Calculator

What is the molar mass of CoO?

Answer

M(CoO) =

74.932 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Cocobalt	1	58.933	58.933 w ≈ 78.65%	≈ 78.65%
Ooxygen	1	15.999	15.999 w ≈ 21.35%	≈ 21.35%
Σ = 74.932 g/mol w = 100%				100%

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

Mass fractions of the elements

Co 78.65%

O 21.35%

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Molar masses of substances nearby

Formula	M, g/mol
KCl (potassium chloride)	74.55
NiO (nickel(II) oxide)	74.692
As (arsenic)	74.922
CoO (cobalt(II) oxide)	74.932
C₂H₅NO₂ (glycine)	75.067
N₂O₃ (dinitrogen trioxide)	76.011
C₃H₈O₂ ((RS)-propylene glycol)	76.095

FAQ

What is the molar mass of CoO?

M(CoO) = 74.932 g/mol

How to calculate the molar mass of CoO?

Add up the atomic weights of all the atoms in the formula: 58.933 + 15.999 = 74.932 g/mol.

How many grams are in 2 moles of CoO?

m = n × M = 2 mol × 74.932 g/mol = 149.864 g.

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