La2Cu3Ce3U2Ru3Pd5Al3Gd5Co5Au2Pu2TlZn3Th3Tm2Fe5Sb3In5Se3S8 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of La₂Cu₃Ce₃U₂Ru₃Pd₅Al₃Gd₅Co₅Au₂Pu₂TlZn₃Th₃Tm₂Fe₅Sb₃In₅Se₃S₈ is 7378.5585 g/mol

Convert between La₂Cu₃Ce₃U₂Ru₃Pd₅Al₃Gd₅Co₅Au₂Pu₂TlZn₃Th₃Tm₂Fe₅Sb₃In₅Se₃S₈ weight and moles

Compound	Moles		Weight, g
La₂Cu₃Ce₃U₂Ru₃Pd₅Al₃Gd₅Co₅Au₂Pu₂TlZn₃Th₃Tm₂Fe₅Sb₃In₅Se₃S₈

Elemental composition of La₂Cu₃Ce₃U₂Ru₃Pd₅Al₃Gd₅Co₅Au₂Pu₂TlZn₃Th₃Tm₂Fe₅Sb₃In₅Se₃S₈

Element	Symbol	Atomic weight	Atoms	Mass percent
Lanthanum	La	138.90547	2	3.7651
Copper	Cu	63.546	3	2.5837
Cerium	Ce	140.116	3	5.6969
Uranium	U	238.02891	2	6.4519
Ruthenium	Ru	101.07	3	4.1093
Palladium	Pd	106.42	5	7.2114
Aluminum	Al	26.9815386	3	1.0970
Gadolinium	Gd	157.25	5	10.6559
Cobalt	Co	58.933195	5	3.9935
Gold	Au	196.966569	2	5.3389
Plutonium	Pu	238.049560	2	6.4525
Thallium	Tl	204.3833	1	2.7700
Zinc	Zn	65.38	3	2.6582
Thorium	Th	232.03806	3	9.4343
Thulium	Tm	168.93421	2	4.5791
Iron	Fe	55.845	5	3.7843
Antimony	Sb	121.760	3	4.9506
Indium	In	114.818	5	7.7805
Selenium	Se	78.96	3	3.2104
Sulfur	S	32.065	8	3.4766

Computing molar mass step by step
First, compute the number of each atom in La₂Cu₃Ce₃U₂Ru₃Pd₅Al₃Gd₅Co₅Au₂Pu₂TlZn₃Th₃Tm₂Fe₅Sb₃In₅Se₃S₈: La: 2, Cu: 3, Ce: 3, U: 2, Ru: 3, Pd: 5, Al: 3, Gd: 5, Co: 5, Au: 2, Pu: 2, Tl: 1, Zn: 3, Th: 3, Tm: 2, Fe: 5, Sb: 3, In: 5, Se: 3, S: 8 Then, lookup atomic weights for each element in periodic table: La: 138.90547, Cu: 63.546, Ce: 140.116, U: 238.02891, Ru: 101.07, Pd: 106.42, Al: 26.9815386, Gd: 157.25, Co: 58.933195, Au: 196.966569, Pu: 238.0495599, Tl: 204.3833, Zn: 65.38, Th: 232.03806, Tm: 168.93421, Fe: 55.845, Sb: 121.76, In: 114.818, Se: 78.96, S: 32.065 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (La₂Cu₃Ce₃U₂Ru₃Pd₅Al₃Gd₅Co₅Au₂Pu₂TlZn₃Th₃Tm₂Fe₅Sb₃In₅Se₃S₈) = ∑ Count_i * Weight_i = Count(La) * Weight(La) + Count(Cu) * Weight(Cu) + Count(Ce) * Weight(Ce) + Count(U) * Weight(U) + Count(Ru) * Weight(Ru) + Count(Pd) * Weight(Pd) + Count(Al) * Weight(Al) + Count(Gd) * Weight(Gd) + Count(Co) * Weight(Co) + Count(Au) * Weight(Au) + Count(Pu) * Weight(Pu) + Count(Tl) * Weight(Tl) + Count(Zn) * Weight(Zn) + Count(Th) * Weight(Th) + Count(Tm) * Weight(Tm) + Count(Fe) * Weight(Fe) + Count(Sb) * Weight(Sb) + Count(In) * Weight(In) + Count(Se) * Weight(Se) + Count(S) * Weight(S) = 2 * 138.90547 + 3 * 63.546 + 3 * 140.116 + 2 * 238.02891 + 3 * 101.07 + 5 * 106.42 + 3 * 26.9815386 + 5 * 157.25 + 5 * 58.933195 + 2 * 196.966569 + 2 * 238.0495599 + 1 * 204.3833 + 3 * 65.38 + 3 * 232.03806 + 2 * 168.93421 + 5 * 55.845 + 3 * 121.76 + 5 * 114.818 + 3 * 78.96 + 8 * 32.065 = 7378.5585 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is Al₃Au₂Ce₃Co₅Cu₃Fe₅Gd₅In₅La₂Pd₅Pu₂Ru₃S₈Sb₃Se₃Th₃TlTm₂U₂Zn₃

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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