Molar Mass of MnO (Manganese(II) Oxide)

Molar Mass Calculator

What is the molar mass of MnO?

Answer

M(MnO) =

70.937 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
Mnmanganese	1	54.938	54.938 w ≈ 77.45%	≈ 77.45%
Ooxygen	1	15.999	15.999 w ≈ 22.55%	≈ 22.55%
Σ = 70.937 g/mol w = 100%				100%

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

Mass fractions of the elements

Mn 77.45%

O 22.55%

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Molar masses of substances nearby

Formula	M, g/mol
Ga (gallium)	69.723
C₅H₁₀ (cyclopentane)	70.135
Cl₂ (chlorine)	70.90
MnO (manganese(II) oxide)	70.937
C₃H₅NO (acrylamide)	71.079
FeO (iron(II) oxide)	71.844
C₃H₄O₂ (acrylic acid)	72.063

FAQ

What is the molar mass of MnO?

M(MnO) = 70.937 g/mol

How to calculate the molar mass of MnO?

Add up the atomic weights of all the atoms in the formula: 54.938 + 15.999 = 70.937 g/mol.

How many grams are in 2 moles of MnO?

m = n × M = 2 mol × 70.937 g/mol = 141.874 g.

See Also