C317H636O1272Fr2544Au5088F10176Xe20352Ne40704U81408 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of C₃₁₇H₆₃₆O₁₂₇₂Fr₂₅₄₄Au₅₀₈₈F₁₀₁₇₆Xe₂₀₃₅₂Ne₄₀₇₀₄U₈₁₄₀₈ is 24658582.6908 g/mol

Convert between C₃₁₇H₆₃₆O₁₂₇₂Fr₂₅₄₄Au₅₀₈₈F₁₀₁₇₆Xe₂₀₃₅₂Ne₄₀₇₀₄U₈₁₄₀₈ weight and moles

Compound	Moles		Weight, g
C₃₁₇H₆₃₆O₁₂₇₂Fr₂₅₄₄Au₅₀₈₈F₁₀₁₇₆Xe₂₀₃₅₂Ne₄₀₇₀₄U₈₁₄₀₈

Elemental composition of C₃₁₇H₆₃₆O₁₂₇₂Fr₂₅₄₄Au₅₀₈₈F₁₀₁₇₆Xe₂₀₃₅₂Ne₄₀₇₀₄U₈₁₄₀₈

Element	Symbol	Atomic weight	Atoms	Mass percent
Carbon	C	12.0107	317	0.0154
Hydrogen	H	1.00794	636	0.0026
Oxygen	O	15.9994	1272	0.0825
Francium	Fr	223.019736	2544	2.3009
Gold	Au	196.966569	5088	4.0642
Fluorine	F	18.9984032	10176	0.7840
Xenon	Xe	131.293	20352	10.8363
Neon	Ne	20.1797	40704	3.3311
Uranium	U	238.02891	81408	78.5830

Computing molar mass step by step
First, compute the number of each atom in C₃₁₇H₆₃₆O₁₂₇₂Fr₂₅₄₄Au₅₀₈₈F₁₀₁₇₆Xe₂₀₃₅₂Ne₄₀₇₀₄U₈₁₄₀₈: C: 317, H: 636, O: 1272, Fr: 2544, Au: 5088, F: 10176, Xe: 20352, Ne: 40704, U: 81408 Then, lookup atomic weights for each element in periodic table: C: 12.0107, H: 1.00794, O: 15.9994, Fr: 223.0197359, Au: 196.966569, F: 18.9984032, Xe: 131.293, Ne: 20.1797, U: 238.02891 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (C₃₁₇H₆₃₆O₁₂₇₂Fr₂₅₄₄Au₅₀₈₈F₁₀₁₇₆Xe₂₀₃₅₂Ne₄₀₇₀₄U₈₁₄₀₈) = ∑ Count_i * Weight_i = Count(C) * Weight(C) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(Fr) * Weight(Fr) + Count(Au) * Weight(Au) + Count(F) * Weight(F) + Count(Xe) * Weight(Xe) + Count(Ne) * Weight(Ne) + Count(U) * Weight(U) = 317 * 12.0107 + 636 * 1.00794 + 1272 * 15.9994 + 2544 * 223.0197359 + 5088 * 196.966569 + 10176 * 18.9984032 + 20352 * 131.293 + 40704 * 20.1797 + 81408 * 238.02891 = 24658582.6908 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₃₁₇H₆₃₆Au₅₀₈₈F₁₀₁₇₆Fr₂₅₄₄Ne₄₀₇₀₄O₁₂₇₂U₈₁₄₀₈Xe₂₀₃₅₂

Computing molar mass (molar weight)

To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use:

Any chemical element. Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al.
Functional groups: D, T, Ph, Me, Et, Bu, AcAc, For, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
parenthesis () or brackets [].
Common compound names.

Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, nitric acid, potassium permanganate, ethanol, fructose, caffeine, water.

Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa.

Computing molecular weight (molecular mass)

To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets.
Examples of molecular weight computations: C[14]O[16]2, S[34]O[16]2.

Definitions

Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Mole is a standard scientific unit for measuring large quantities of very small entities such as atoms and molecules. One mole contains exactly 6.022 ×10²³ particles (Avogadro's number)

Steps to calculate molar mass

Identify the compound: write down the chemical formula of the compound. For example, water is H₂O, meaning it contains two hydrogen atoms and one oxygen atom.
Find atomic masses: look up the atomic masses of each element present in the compound. The atomic mass is usually found on the periodic table and is given in atomic mass units (amu).
Calculate molar mass of each element: multiply the atomic mass of each element by the number of atoms of that element in the compound.
Add them together: add the results from step 3 to get the total molar mass of the compound.

Example: calculating molar mass

Let's calculate the molar mass of carbon dioxide (CO₂):

Carbon (C) has an atomic mass of about 12.01 amu.
Oxygen (O) has an atomic mass of about 16.00 amu.
CO₂ has one carbon atom and two oxygen atoms.
The molar mass of carbon dioxide is 12.01 + (2 × 16.00) = 44.01 g/mol.

Lesson on computing molar mass

Weights of atoms and isotopes are from NIST article.

molecular weights calculated today

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