Molar Mass of CaO (Calcium Oxide)

Molar Mass Calculator
Chemical formula Write symbols with a capital letter: CoCl2 is cobalt chloride, COCl2 is phosgene. A hydrate takes a dot: CuSO4·5H2O or CuSO4.5H2O

What is the molar mass of CaO?

Answer

M(CaO) =
56.077 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
Cacalcium140.07840.078 w ≈ 71.47%
Ooxygen115.99915.999 w ≈ 28.53%
Σ = 56.077 g/mol w = 100%

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

Mass fractions of the elements

O 28.53%

Related Calculations

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Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
C₄H₆ (1,3-butadiene)54.092
Mn (manganese)54.938
Fe (iron)55.845
CaO (calcium oxide)56.077
KOH (potassium hydroxide)56.105
C₄H₈ (isobutylene)56.108
MgS (magnesium sulfide)56.37

FAQ

What is the molar mass of CaO?

M(CaO) = 56.077 g/mol

How to calculate the molar mass of CaO?

Add up the atomic weights of all the atoms in the formula: 40.078 + 15.999 = 56.077 g/mol.

How many grams are in 2 moles of CaO?

m = n × M = 2 mol × 56.077 g/mol = 112.154 g.

See Also