Molar Mass of C20H14O4 (Phenolphthalein)

Molar Mass Calculator

What is the molar mass of C₂₀H₁₄O₄?

Answer

M(C₂₀H₁₄O₄) =

318.328 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	20	12.011	240.220 w ≈ 75.46%	≈ 75.46%
Hhydrogen	14	1.0080	14.1120 w ≈ 4.43%	≈ 4.43%
Ooxygen	4	15.999	63.996 w ≈ 20.10%	≈ 20.10%
Σ = 318.328 g/mol w = 100%				100%

Each fraction is rounded on its own, so the printed ones add up to 99.99%; unrounded, they make exactly 100%.

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

Mass fractions of the elements

C 75.46%

O 20.10%H 4.43%

Related Calculations

See Also

Liters to Kilograms - How many kilograms are in a liter of water, honey, gasoline, sand and other substances — by density
Grams to Kg - Convert Grams to Kilograms
Percentage Calculator: Fraction to Percent - What percentage one number is of another? Convert fraction into a percentage
Scientific Calculator with Memory & History - Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89

Recalculate with different values ↑

Molar masses of substances nearby

Formula	M, g/mol
Ba(ClO₃)₂ (barium chlorate)	304.22
Ca₃(PO₄)₂ (tricalcium phosphate)	310.174
Ag₂SO₄ (silver sulfate)	311.80
C₂₀H₁₄O₄ (phenolphthalein)	318.328
ZnI₂ (zinc iodide)	319.18
C₁₆H₁₈ClN₃S (methylene blue)	319.85
Na₂SO₄·10H₂O (sodium sulfate decahydrate)	322.19

FAQ

What is the molar mass of C20H14O4?

M(C₂₀H₁₄O₄) = 318.328 g/mol

How to calculate the molar mass of C₂₀H₁₄O₄?

Add up the atomic weights of all the atoms in the formula: 20 × 12.011 + 14 × 1.0080 + 4 × 15.999 = 318.328 g/mol.

How many grams are in 2 moles of C₂₀H₁₄O₄?

m = n × M = 2 mol × 318.328 g/mol = 636.656 g.

See Also