Molar Mass of C8H9NO2 (Paracetamol)

Molar Mass Calculator

What is the molar mass of C₈H₉NO₂?

Answer

M(C₈H₉NO₂) =

151.165 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	8	12.011	96.088 w ≈ 63.56%	≈ 63.56%
Hhydrogen	9	1.0080	9.0720 w ≈ 6.00%	≈ 6.00%
Nnitrogen	1	14.007	14.007 w ≈ 9.27%	≈ 9.27%
Ooxygen	2	15.999	31.998 w ≈ 21.17%	≈ 21.17%
Σ = 151.165 g/mol w = 100%				100%

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

Mass fractions of the elements

C 63.56%

O 21.17%N 9.27%H 6.00%

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Molar masses of substances nearby

Formula	M, g/mol
Sm (samarium)	150.36
SnO₂ (tin(IV) oxide)	150.71
MnSO₄ (manganese(II) sulfate)	150.99
C₈H₉NO₂ (paracetamol)	151.165
FeSO₄ (iron(II) sulfate)	151.90
Eu (europium)	151.96
Cr₂O₃ (dichromium trioxide)	151.989

FAQ

What is the molar mass of C8H9NO2?

M(C₈H₉NO₂) = 151.165 g/mol

How to calculate the molar mass of C₈H₉NO₂?

Add up the atomic weights of all the atoms in the formula: 8 × 12.011 + 9 × 1.0080 + 14.007 + 2 × 15.999 = 151.165 g/mol.

How many grams are in 2 moles of C₈H₉NO₂?

m = n × M = 2 mol × 151.165 g/mol = 302.330 g.

See Also