H99HeLiBeBCNOFArNaMgAlSiSClNeUHg9FeVNiCrGeGd molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₉₉HeLiBeBCNOFArNaMgAlSiSClNeUHg₉FeVNiCrGeGd is 2912.2805 g/mol

Convert between H₉₉HeLiBeBCNOFArNaMgAlSiSClNeUHg₉FeVNiCrGeGd weight and moles

Compound	Moles		Weight, g
H₉₉HeLiBeBCNOFArNaMgAlSiSClNeUHg₉FeVNiCrGeGd

Elemental composition of H₉₉HeLiBeBCNOFArNaMgAlSiSClNeUHg₉FeVNiCrGeGd

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	99	3.4264
Helium	He	4.002602	1	0.1374
Lithium	Li	6.941	1	0.2383
Beryllium	Be	9.012182	1	0.3095
Boron	B	10.811	1	0.3712
Carbon	C	12.0107	1	0.4124
Nitrogen	N	14.0067	1	0.4810
Oxygen	O	15.9994	1	0.5494
Fluorine	F	18.9984032	1	0.6524
Argon	Ar	39.948	1	1.3717
Sodium	Na	22.98976928	1	0.7894
Magnesium	Mg	24.3050	1	0.8346
Aluminum	Al	26.9815386	1	0.9265
Silicon	Si	28.0855	1	0.9644
Sulfur	S	32.065	1	1.1010
Chlorine	Cl	35.453	1	1.2174
Neon	Ne	20.1797	1	0.6929
Uranium	U	238.02891	1	8.1733
Mercury	Hg	200.59	9	61.9896
Iron	Fe	55.845	1	1.9176
Vanadium	V	50.9415	1	1.7492
Nickel	Ni	58.6934	1	2.0154
Chromium	Cr	51.9961	1	1.7854
Germanium	Ge	72.64	1	2.4943
Gadolinium	Gd	157.25	1	5.3995

Computing molar mass step by step
First, compute the number of each atom in H₉₉HeLiBeBCNOFArNaMgAlSiSClNeUHg₉FeVNiCrGeGd: H: 99, He: 1, Li: 1, Be: 1, B: 1, C: 1, N: 1, O: 1, F: 1, Ar: 1, Na: 1, Mg: 1, Al: 1, Si: 1, S: 1, Cl: 1, Ne: 1, U: 1, Hg: 9, Fe: 1, V: 1, Ni: 1, Cr: 1, Ge: 1, Gd: 1 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, Ar: 39.948, Na: 22.98976928, Mg: 24.305, Al: 26.9815386, Si: 28.0855, S: 32.065, Cl: 35.453, Ne: 20.1797, U: 238.02891, Hg: 200.59, Fe: 55.845, V: 50.9415, Ni: 58.6934, Cr: 51.9961, Ge: 72.64, Gd: 157.25 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₉₉HeLiBeBCNOFArNaMgAlSiSClNeUHg₉FeVNiCrGeGd) = ∑ 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(Ar) * Weight(Ar) + Count(Na) * Weight(Na) + Count(Mg) * Weight(Mg) + Count(Al) * Weight(Al) + Count(Si) * Weight(Si) + Count(S) * Weight(S) + Count(Cl) * Weight(Cl) + Count(Ne) * Weight(Ne) + Count(U) * Weight(U) + Count(Hg) * Weight(Hg) + Count(Fe) * Weight(Fe) + Count(V) * Weight(V) + Count(Ni) * Weight(Ni) + Count(Cr) * Weight(Cr) + Count(Ge) * Weight(Ge) + Count(Gd) * Weight(Gd) = 99 * 1.00794 + 1 * 4.002602 + 1 * 6.941 + 1 * 9.012182 + 1 * 10.811 + 1 * 12.0107 + 1 * 14.0067 + 1 * 15.9994 + 1 * 18.9984032 + 1 * 39.948 + 1 * 22.98976928 + 1 * 24.305 + 1 * 26.9815386 + 1 * 28.0855 + 1 * 32.065 + 1 * 35.453 + 1 * 20.1797 + 1 * 238.02891 + 9 * 200.59 + 1 * 55.845 + 1 * 50.9415 + 1 * 58.6934 + 1 * 51.9961 + 1 * 72.64 + 1 * 157.25 = 2912.2805 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is CH₉₉AlArBBeClCrFFeGdGeHeHg₉LiMgNNaNeNiOSSiUV

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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