Molar Mass of C5H12 (N-pentane)

Molar Mass Calculator

What is the molar mass of C₅H₁₂?

Answer

M(C₅H₁₂) =

72.151 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	5	12.011	60.055 w ≈ 83.24%	≈ 83.24%
Hhydrogen	12	1.0080	12.0960 w ≈ 16.76%	≈ 16.76%
Σ = 72.151 g/mol w = 100%				100%

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

Mass fractions of the elements

C 83.24%

H 16.76%

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Molar masses of substances nearby

Formula	M, g/mol
C₃H₄O₂ (acrylic acid)	72.063
C₄H₈O (butanone)	72.107
CaS (calcium sulfide)	72.14
C₅H₁₂ (n-pentane)	72.151
Ge (germanium)	72.630
C₄H₁₁N (diethylamine)	73.139
Li₂CO₃ (lithium carbonate)	73.89

FAQ

What is the molar mass of C5H12?

M(C₅H₁₂) = 72.151 g/mol

How to calculate the molar mass of C₅H₁₂?

Add up the atomic weights of all the atoms in the formula: 5 × 12.011 + 12 × 1.0080 = 72.151 g/mol.

How many grams are in 2 moles of C₅H₁₂?

m = n × M = 2 mol × 72.151 g/mol = 144.302 g.

See Also