Molar Mass of C9H8O2 ((E)-cinnamic Acid)

Molar Mass Calculator

What is the molar mass of C₉H₈O₂?

Answer

M(C₉H₈O₂) =

148.161 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	9	12.011	108.099 w ≈ 72.96%	≈ 72.96%
Hhydrogen	8	1.0080	8.0640 w ≈ 5.44%	≈ 5.44%
Ooxygen	2	15.999	31.998 w ≈ 21.60%	≈ 21.60%
Σ = 148.161 g/mol w = 100%				100%

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

Mass fractions of the elements

C 72.96%

O 21.60%H 5.44%

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Molar masses of substances nearby

Formula	M, g/mol
C₅H₉NO₄ (DL-glutamic acid)	147.130
SrCO₃ (strontium carbonate)	147.63
C₈H₄O₃ (phthalic anhydride)	148.117
C₉H₈O₂ ((E)-cinnamic acid)	148.161
Mg(NO₃)₂ (magnesium nitrate)	148.313
C₅H₁₁NO₂S (DL-methionine)	149.21
AgOCN (silver cyanate)	149.89

FAQ

What is the molar mass of C9H8O2?

M(C₉H₈O₂) = 148.161 g/mol

How to calculate the molar mass of C₉H₈O₂?

Add up the atomic weights of all the atoms in the formula: 9 × 12.011 + 8 × 1.0080 + 2 × 15.999 = 148.161 g/mol.

How many grams are in 2 moles of C₉H₈O₂?

m = n × M = 2 mol × 148.161 g/mol = 296.322 g.

See Also