Molar Mass of KCN (Potassium Cyanide)

Molar Mass Calculator

What is the molar mass of KCN?

Answer

M(KCN) =

65.116 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
Kpotassium	1	39.098	39.098 w ≈ 60.04%	≈ 60.04%
Ccarbon	1	12.011	12.011 w ≈ 18.45%	≈ 18.45%
Nnitrogen	1	14.007	14.007 w ≈ 21.51%	≈ 21.51%
Σ = 65.116 g/mol w = 100%				100%

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

Mass fractions of the elements

K 60.04%

N 21.51%C 18.45%

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Molar masses of substances nearby

Formula	M, g/mol
CaC₂ (calcium carbide)	64.100
C₂H₅Cl (chloroethane)	64.51
NaN₃ (sodium azide)	65.011
KCN (potassium cyanide)	65.116
Zn (zinc)	65.38
HCOONa (sodium formate)	68.007
C₃O₂ (carbon suboxide)	68.031

FAQ

What is the molar mass of KCN?

M(KCN) = 65.116 g/mol

How to calculate the molar mass of KCN?

Add up the atomic weights of all the atoms in the formula: 39.098 + 12.011 + 14.007 = 65.116 g/mol.

How many grams are in 2 moles of KCN?

m = n × M = 2 mol × 65.116 g/mol = 130.232 g.

See Also