Molar Mass of CHI3 (Iodoform)

Molar Mass Calculator

What is the molar mass of CHI₃?

Answer

M(CHI₃) ≈

393.72 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — I: 126.90.

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 ≈ 3.05%	≈ 3.05%
Hhydrogen	1	1.0080	1.0080 w ≈ 0.26%	≈ 0.26%
Iiodine	3	126.90	380.70 w ≈ 96.69%	≈ 96.69%
Σ = 393.719 ≈ 393.72 g/mol w = 100%				100%

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

Mass fractions of the elements

I 96.69%

C 3.05%H 0.26%

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Molar masses of substances nearby

Formula	M, g/mol
Zn₃(PO₄)₂ (zinc phosphate)	386.08
BaI₂ (barium iodide)	391.13
Cr₂(SO₄)₃ (chromium(III) sulfate)	392.16
CHI₃ (iodoform)	393.72
C₁₂H₁₉Cl₃O₈ (sucralose)	397.63
Fe₂(SO₄)₃ (ferric sulfate)	399.86
AlI₃ (aluminum iodide)	407.68

FAQ

What is the molar mass of CHI3?

M(CHI₃) ≈ 393.72 g/mol

How to calculate the molar mass of CHI₃?

Add up the atomic weights of all the atoms in the formula: 12.011 + 1.0080 + 3 × 126.90 = 393.719 ≈ 393.72 g/mol.

How many grams are in 2 moles of CHI₃?

m = n × M = 2 mol × 393.72 g/mol = 787.44 g.

See Also