H117He116Li115Be114B113C112N111O110F109Ne108Na107Mg106Al105 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₁₁₇He₁₁₆Li₁₁₅Be₁₁₄B₁₁₃C₁₁₂N₁₁₁O₁₁₀F₁₀₉Ne₁₀₈Na₁₀₇Mg₁₀₆Al₁₀₅ is 20408.8841 g/mol

Convert between H₁₁₇He₁₁₆Li₁₁₅Be₁₁₄B₁₁₃C₁₁₂N₁₁₁O₁₁₀F₁₀₉Ne₁₀₈Na₁₀₇Mg₁₀₆Al₁₀₅ weight and moles

Compound	Moles		Weight, g
H₁₁₇He₁₁₆Li₁₁₅Be₁₁₄B₁₁₃C₁₁₂N₁₁₁O₁₁₀F₁₀₉Ne₁₀₈Na₁₀₇Mg₁₀₆Al₁₀₅

Elemental composition of H₁₁₇He₁₁₆Li₁₁₅Be₁₁₄B₁₁₃C₁₁₂N₁₁₁O₁₁₀F₁₀₉Ne₁₀₈Na₁₀₇Mg₁₀₆Al₁₀₅

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	117	0.5778
Helium	He	4.002602	116	2.2750
Lithium	Li	6.941	115	3.9111
Beryllium	Be	9.012182	114	5.0340
Boron	B	10.811	113	5.9858
Carbon	C	12.0107	112	6.5912
Nitrogen	N	14.0067	111	7.6180
Oxygen	O	15.9994	110	8.6234
Fluorine	F	18.9984032	109	10.1467
Neon	Ne	20.1797	108	10.6787
Sodium	Na	22.98976928	107	12.0531
Magnesium	Mg	24.3050	106	12.6236
Aluminum	Al	26.9815386	105	13.8815

Computing molar mass step by step
First, compute the number of each atom in H₁₁₇He₁₁₆Li₁₁₅Be₁₁₄B₁₁₃C₁₁₂N₁₁₁O₁₁₀F₁₀₉Ne₁₀₈Na₁₀₇Mg₁₀₆Al₁₀₅: H: 117, He: 116, Li: 115, Be: 114, B: 113, C: 112, N: 111, O: 110, F: 109, Ne: 108, Na: 107, Mg: 106, Al: 105 Then, lookup atomic weights for each element in periodic table: H: 1.00794, He: 4.002602, Li: 6.941, Be: 9.012182, B: 10.811, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, Ne: 20.1797, Na: 22.98976928, Mg: 24.305, Al: 26.9815386 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₁₁₇He₁₁₆Li₁₁₅Be₁₁₄B₁₁₃C₁₁₂N₁₁₁O₁₁₀F₁₀₉Ne₁₀₈Na₁₀₇Mg₁₀₆Al₁₀₅) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(B) * Weight(B) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(Ne) * Weight(Ne) + Count(Na) * Weight(Na) + Count(Mg) * Weight(Mg) + Count(Al) * Weight(Al) = 117 * 1.00794 + 116 * 4.002602 + 115 * 6.941 + 114 * 9.012182 + 113 * 10.811 + 112 * 12.0107 + 111 * 14.0067 + 110 * 15.9994 + 109 * 18.9984032 + 108 * 20.1797 + 107 * 22.98976928 + 106 * 24.305 + 105 * 26.9815386 = 20408.8841 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₁₁₂H₁₁₇Al₁₀₅B₁₁₃Be₁₁₄F₁₀₉He₁₁₆Li₁₁₅Mg₁₀₆N₁₁₁Na₁₀₇Ne₁₀₈O₁₁₀

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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