H99He99Li9Be9B9C9N9O9F9Ne9Na9Mg9Al9Si9P9S9Cl9Ar9Ca9Sc9Ti9Cr9 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₉₉He₉₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉Ca₉Sc₉Ti₉Cr₉ is 5298.9627 g/mol

Convert between H₉₉He₉₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉Ca₉Sc₉Ti₉Cr₉ weight and moles

Compound	Moles		Weight, g
H₉₉He₉₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉Ca₉Sc₉Ti₉Cr₉

Elemental composition of H₉₉He₉₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉Ca₉Sc₉Ti₉Cr₉

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	99	1.8831
Helium	He	4.002602	99	7.4780
Lithium	Li	6.941	9	1.1789
Beryllium	Be	9.012182	9	1.5307
Boron	B	10.811	9	1.8362
Carbon	C	12.0107	9	2.0400
Nitrogen	N	14.0067	9	2.3790
Oxygen	O	15.9994	9	2.7174
Fluorine	F	18.9984032	9	3.2268
Neon	Ne	20.1797	9	3.4274
Sodium	Na	22.98976928	9	3.9047
Magnesium	Mg	24.3050	9	4.1281
Aluminum	Al	26.9815386	9	4.5827
Silicon	Si	28.0855	9	4.7702
Phosphorus	P	30.973762	9	5.2607
Sulfur	S	32.065	9	5.4461
Chlorine	Cl	35.453	9	6.0215
Argon	Ar	39.948	9	6.7850
Calcium	Ca	40.078	9	6.8070
Scandium	Sc	44.955912	9	7.6355
Titanium	Ti	47.867	9	8.1299
Chromium	Cr	51.9961	9	8.8313

Computing molar mass step by step
First, compute the number of each atom in H₉₉He₉₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉Ca₉Sc₉Ti₉Cr₉: H: 99, He: 99, Li: 9, Be: 9, B: 9, C: 9, N: 9, O: 9, F: 9, Ne: 9, Na: 9, Mg: 9, Al: 9, Si: 9, P: 9, S: 9, Cl: 9, Ar: 9, Ca: 9, Sc: 9, Ti: 9, Cr: 9 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, Si: 28.0855, P: 30.973762, S: 32.065, Cl: 35.453, Ar: 39.948, Ca: 40.078, Sc: 44.955912, Ti: 47.867, Cr: 51.9961 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₉₉He₉₉Li₉Be₉B₉C₉N₉O₉F₉Ne₉Na₉Mg₉Al₉Si₉P₉S₉Cl₉Ar₉Ca₉Sc₉Ti₉Cr₉) = ∑ 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) + Count(Si) * Weight(Si) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Cl) * Weight(Cl) + Count(Ar) * Weight(Ar) + Count(Ca) * Weight(Ca) + Count(Sc) * Weight(Sc) + Count(Ti) * Weight(Ti) + Count(Cr) * Weight(Cr) = 99 * 1.00794 + 99 * 4.002602 + 9 * 6.941 + 9 * 9.012182 + 9 * 10.811 + 9 * 12.0107 + 9 * 14.0067 + 9 * 15.9994 + 9 * 18.9984032 + 9 * 20.1797 + 9 * 22.98976928 + 9 * 24.305 + 9 * 26.9815386 + 9 * 28.0855 + 9 * 30.973762 + 9 * 32.065 + 9 * 35.453 + 9 * 39.948 + 9 * 40.078 + 9 * 44.955912 + 9 * 47.867 + 9 * 51.9961 = 5298.9627 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₉H₉₉Al₉Ar₉B₉Be₉Ca₉Cl₉Cr₉F₉He₉₉Li₉Mg₉N₉Na₉Ne₉O₉P₉S₉Sc₉Si₉Ti₉

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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