Molar Mass of C2H2 (Acetylene)

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 C2H2?

Answer

M(C2H2) =
26.038 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
Ccarbon212.01124.022 w ≈ 92.26%
Hhydrogen21.00802.0160 w ≈ 7.74%
Σ = 26.038 g/mol w = 100%

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

Mass fractions of the elements

H 7.74%

Related Calculations

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Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
BN (boron nitride)24.82
BeO (beryllium oxide)25.011
LiF (lithium fluoride)25.94
C₂H₂ (acetylene)26.038
Al (aluminium)26.982
CHN (hydrogen cyanide)27.026
CO (carbon monoxide)28.010

FAQ

What is the molar mass of C2H2?

M(C₂H₂) = 26.038 g/mol

How to calculate the molar mass of C₂H₂?

Add up the atomic weights of all the atoms in the formula: 2 × 12.011 + 2 × 1.0080 = 26.038 g/mol.

How many grams are in 2 moles of C₂H₂?

m = n × M = 2 mol × 26.038 g/mol = 52.076 g.

See Also