HeNeArKrXeU9HK12Na54Li99Cl2Br6S19Sr5Ag7Pb8C12F13I4EsUuo molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of HeNeArKrXeU₉HK₁₂Na₅₄Li₉₉Cl₂Br₆S₁₉Sr₅Ag₇Pb₈C₁₂F₁₃I₄EsUuo is 9981.4265 g/mol

Convert between HeNeArKrXeU₉HK₁₂Na₅₄Li₉₉Cl₂Br₆S₁₉Sr₅Ag₇Pb₈C₁₂F₁₃I₄EsUuo weight and moles

Compound	Moles		Weight, g
HeNeArKrXeU₉HK₁₂Na₅₄Li₉₉Cl₂Br₆S₁₉Sr₅Ag₇Pb₈C₁₂F₁₃I₄EsUuo

Elemental composition of HeNeArKrXeU₉HK₁₂Na₅₄Li₉₉Cl₂Br₆S₁₉Sr₅Ag₇Pb₈C₁₂F₁₃I₄EsUuo

Element	Symbol	Atomic weight	Atoms	Mass percent
Helium	He	4.002602	1	0.0401
Neon	Ne	20.1797	1	0.2022
Argon	Ar	39.948	1	0.4002
Krypton	Kr	83.798	1	0.8395
Xenon	Xe	131.293	1	1.3154
Uranium	U	238.02891	9	21.4625
Hydrogen	H	1.00794	1	0.0101
Potassium	K	39.0983	12	4.7005
Sodium	Na	22.98976928	54	12.4376
Lithium	Li	6.941	99	6.8844
Chlorine	Cl	35.453	2	0.7104
Bromine	Br	79.904	6	4.8032
Sulfur	S	32.065	19	6.1037
Strontium	Sr	87.62	5	4.3892
Silver	Ag	107.8682	7	7.5648
Lead	Pb	207.2	8	16.6068
Carbon	C	12.0107	12	1.4440
Fluorine	F	18.9984032	13	2.4744
Iodine	I	126.90447	4	5.0856
Einsteinium	Es	252.08298	1	2.5255
Oganesson	Uuo	0.0000000	1	0.0000

Computing molar mass step by step
First, compute the number of each atom in HeNeArKrXeU₉HK₁₂Na₅₄Li₉₉Cl₂Br₆S₁₉Sr₅Ag₇Pb₈C₁₂F₁₃I₄EsUuo: He: 1, Ne: 1, Ar: 1, Kr: 1, Xe: 1, U: 9, H: 1, K: 12, Na: 54, Li: 99, Cl: 2, Br: 6, S: 19, Sr: 5, Ag: 7, Pb: 8, C: 12, F: 13, I: 4, Es: 1, Uuo: 1 Then, lookup atomic weights for each element in periodic table: He: 4.002602, Ne: 20.1797, Ar: 39.948, Kr: 83.798, Xe: 131.293, U: 238.02891, H: 1.00794, K: 39.0983, Na: 22.98976928, Li: 6.941, Cl: 35.453, Br: 79.904, S: 32.065, Sr: 87.62, Ag: 107.8682, Pb: 207.2, C: 12.0107, F: 18.9984032, I: 126.90447, Es: 252.08298, Uuo: 0 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (HeNeArKrXeU₉HK₁₂Na₅₄Li₉₉Cl₂Br₆S₁₉Sr₅Ag₇Pb₈C₁₂F₁₃I₄EsUuo) = ∑ Count_i * Weight_i = Count(He) * Weight(He) + Count(Ne) * Weight(Ne) + Count(Ar) * Weight(Ar) + Count(Kr) * Weight(Kr) + Count(Xe) * Weight(Xe) + Count(U) * Weight(U) + Count(H) * Weight(H) + Count(K) * Weight(K) + Count(Na) * Weight(Na) + Count(Li) * Weight(Li) + Count(Cl) * Weight(Cl) + Count(Br) * Weight(Br) + Count(S) * Weight(S) + Count(Sr) * Weight(Sr) + Count(Ag) * Weight(Ag) + Count(Pb) * Weight(Pb) + Count(C) * Weight(C) + Count(F) * Weight(F) + Count(I) * Weight(I) + Count(Es) * Weight(Es) + Count(Uuo) * Weight(Uuo) = 1 * 4.002602 + 1 * 20.1797 + 1 * 39.948 + 1 * 83.798 + 1 * 131.293 + 9 * 238.02891 + 1 * 1.00794 + 12 * 39.0983 + 54 * 22.98976928 + 99 * 6.941 + 2 * 35.453 + 6 * 79.904 + 19 * 32.065 + 5 * 87.62 + 7 * 107.8682 + 8 * 207.2 + 12 * 12.0107 + 13 * 18.9984032 + 4 * 126.90447 + 1 * 252.08298 + 1 * 0 = 9981.4265 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₁₂HAg₇ArBr₆Cl₂EsF₁₃HeI₄K₁₂KrLi₉₉Na₅₄NePb₈S₁₉Sr₅U₉UuoXe

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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