Molar Mass of C2H5Cl (Chloroethane)

Molar Mass Calculator

What is the molar mass of C₂H₅Cl?

Answer

M(C₂H₅Cl) ≈

64.51 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — Cl: 35.45.

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 ≈ 37.24%	≈ 37.24%
Hhydrogen	5	1.0080	5.0400 w ≈ 7.81%	≈ 7.81%
Clchlorine	1	35.45	35.45 w ≈ 54.95%	≈ 54.95%
Σ = 64.512 ≈ 64.51 g/mol w = 100%				100%

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

Mass fractions of the elements

Cl 54.95%C 37.24%

H 7.81%

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Molar masses of substances nearby

Formula	M, g/mol
Cu (copper)	63.546
SO₂ (sulfur dioxide)	64.06
CaC₂ (calcium carbide)	64.100
C₂H₅Cl (chloroethane)	64.51
NaN₃ (sodium azide)	65.011
KCN (potassium cyanide)	65.116
Zn (zinc)	65.38

FAQ

What is the molar mass of C2H5Cl?

M(C₂H₅Cl) ≈ 64.51 g/mol

How to calculate the molar mass of C₂H₅Cl?

Add up the atomic weights of all the atoms in the formula: 2 × 12.011 + 5 × 1.0080 + 35.45 = 64.512 ≈ 64.51 g/mol.

How many grams are in 2 moles of C₂H₅Cl?

m = n × M = 2 mol × 64.51 g/mol = 129.02 g.

See Also