C99H1111Al99B99Be99F99He99Li99Mg99N99Na99Ne99O99P99S99Si99 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of C₉₉H₁₁₁₁Al₉₉B₉₉Be₉₉F₉₉He₉₉Li₉₉Mg₉₉N₉₉Na₉₉Ne₉₉O₉₉P₉₉S₉₉Si₉₉ is 28578.6848 g/mol

Convert between C₉₉H₁₁₁₁Al₉₉B₉₉Be₉₉F₉₉He₉₉Li₉₉Mg₉₉N₉₉Na₉₉Ne₉₉O₉₉P₉₉S₉₉Si₉₉ weight and moles

Compound	Moles		Weight, g
C₉₉H₁₁₁₁Al₉₉B₉₉Be₉₉F₉₉He₉₉Li₉₉Mg₉₉N₉₉Na₉₉Ne₉₉O₉₉P₉₉S₉₉Si₉₉

Elemental composition of C₉₉H₁₁₁₁Al₉₉B₉₉Be₉₉F₉₉He₉₉Li₉₉Mg₉₉N₉₉Na₉₉Ne₉₉O₉₉P₉₉S₉₉Si₉₉

Element	Symbol	Atomic weight	Atoms	Mass percent
Carbon	C	12.0107	99	4.1607
Hydrogen	H	1.00794	1111	3.9184
Aluminum	Al	26.9815386	99	9.3467
Boron	B	10.811	99	3.7451
Beryllium	Be	9.012182	99	3.1219
Fluorine	F	18.9984032	99	6.5813
Helium	He	4.002602	99	1.3865
Lithium	Li	6.941	99	2.4044
Magnesium	Mg	24.3050	99	8.4195
Nitrogen	N	14.0067	99	4.8521
Sodium	Na	22.98976928	99	7.9639
Neon	Ne	20.1797	99	6.9905
Oxygen	O	15.9994	99	5.5424
Phosphorus	P	30.973762	99	10.7297
Sulfur	S	32.065	99	11.1077
Silicon	Si	28.0855	99	9.7292

Computing molar mass step by step
First, compute the number of each atom in C₉₉H₁₁₁₁Al₉₉B₉₉Be₉₉F₉₉He₉₉Li₉₉Mg₉₉N₉₉Na₉₉Ne₉₉O₉₉P₉₉S₉₉Si₉₉: C: 99, H: 1111, Al: 99, B: 99, Be: 99, F: 99, He: 99, Li: 99, Mg: 99, N: 99, Na: 99, Ne: 99, O: 99, P: 99, S: 99, Si: 99 Then, lookup atomic weights for each element in periodic table: C: 12.0107, H: 1.00794, Al: 26.9815386, B: 10.811, Be: 9.012182, F: 18.9984032, He: 4.002602, Li: 6.941, Mg: 24.305, N: 14.0067, Na: 22.98976928, Ne: 20.1797, O: 15.9994, P: 30.973762, S: 32.065, Si: 28.0855 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (C₉₉H₁₁₁₁Al₉₉B₉₉Be₉₉F₉₉He₉₉Li₉₉Mg₉₉N₉₉Na₉₉Ne₉₉O₉₉P₉₉S₉₉Si₉₉) = ∑ Count_i * Weight_i = Count(C) * Weight(C) + Count(H) * Weight(H) + Count(Al) * Weight(Al) + Count(B) * Weight(B) + Count(Be) * Weight(Be) + Count(F) * Weight(F) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Mg) * Weight(Mg) + Count(N) * Weight(N) + Count(Na) * Weight(Na) + Count(Ne) * Weight(Ne) + Count(O) * Weight(O) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Si) * Weight(Si) = 99 * 12.0107 + 1111 * 1.00794 + 99 * 26.9815386 + 99 * 10.811 + 99 * 9.012182 + 99 * 18.9984032 + 99 * 4.002602 + 99 * 6.941 + 99 * 24.305 + 99 * 14.0067 + 99 * 22.98976928 + 99 * 20.1797 + 99 * 15.9994 + 99 * 30.973762 + 99 * 32.065 + 99 * 28.0855 = 28578.6848 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₉₉H₁₁₁₁Al₉₉B₉₉Be₉₉F₉₉He₉₉Li₉₉Mg₉₉N₉₉Na₉₉Ne₉₉O₉₉P₉₉S₉₉Si₉₉

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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