Molar Mass of COCl2 (Phosgene)

Molar Mass Calculator

What is the molar mass of COCl₂?

Answer

M(COCl₂) =

98.91 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

CoCl₂ (cobaltous chloride) is a different substance: M(CoCl₂) ≈ 129.83 g/mol.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Ccarbon	1	12.011	12.011 w ≈ 12.14%	≈ 12.14%
Ooxygen	1	15.999	15.999 w ≈ 16.18%	≈ 16.18%
Clchlorine	2	35.45	70.90 w ≈ 71.68%	≈ 71.68%
Σ = 98.91 g/mol w = 100%				100%

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

Mass fractions of the elements

Cl 71.68%

O 16.18%C 12.14%

Related Calculations

See Also

Liters to Kilograms - How many kilograms are in a liter of water, honey, gasoline, sand and other substances — by density
Grams to Kg - Convert Grams to Kilograms
Percentage Calculator: Fraction to Percent - What percentage one number is of another? Convert fraction into a percentage
Scientific Calculator with Memory & History - Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89

Recalculate with different values ↑

Molar masses of substances nearby

Formula	M, g/mol
H₂SO₄ (sulfuric acid)	98.07
CH₃COOK (potassium acetate)	98.142
C₆H₁₀O (cyclohexanone)	98.145
COCl₂ (phosgene)	98.91
CuCl (cuprous chloride)	99.00
Zn(OH)₂ (zinc hydroxide)	99.39
CrO₃ (chromium trioxide)	99.993

FAQ

What is the molar mass of COCl2?

M(COCl₂) = 98.91 g/mol

How to calculate the molar mass of COCl₂?

Add up the atomic weights of all the atoms in the formula: 12.011 + 15.999 + 2 × 35.45 = 98.91 g/mol.

How many grams are in 2 moles of COCl₂?

m = n × M = 2 mol × 98.91 g/mol = 197.82 g.

See Also