Molar Mass of C2H4 (Ethylene)

Molar Mass Calculator

What is the molar mass of C₂H₄?

Answer

M(C₂H₄) =

28.054 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
Ccarbon	2	12.011	24.022 w ≈ 85.63%	≈ 85.63%
Hhydrogen	4	1.0080	4.0320 w ≈ 14.37%	≈ 14.37%
Σ = 28.054 g/mol w = 100%				100%

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

Mass fractions of the elements

C 85.63%

H 14.37%

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Molar masses of substances nearby

Formula	M, g/mol
CHN (hydrogen cyanide)	27.026
CO (carbon monoxide)	28.010
N₂ (nitrogen)	28.014
C₂H₄ (ethylene)	28.054
Si (silicon)	28.085
Li₂O (lithium oxide)	29.88
NO (nitric oxide)	30.006

FAQ

What is the molar mass of C2H4?

M(C₂H₄) = 28.054 g/mol

How to calculate the molar mass of C₂H₄?

Add up the atomic weights of all the atoms in the formula: 2 × 12.011 + 4 × 1.0080 = 28.054 g/mol.

How many grams are in 2 moles of C₂H₄?

m = n × M = 2 mol × 28.054 g/mol = 56.108 g.

See Also