Be12Li24O16P4Rh3Tl5Pb15S22F43Xe23Kr29TaUWSeBErAcLrNoLuRnHfRg molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Be₁₂Li₂₄O₁₆P₄Rh₃Tl₅Pb₁₅S₂₂F₄₃Xe₂₃Kr₂₉TaUWSeBErAcLrNoLuRnHfRg is 14518.1880 g/mol

Convert between Be₁₂Li₂₄O₁₆P₄Rh₃Tl₅Pb₁₅S₂₂F₄₃Xe₂₃Kr₂₉TaUWSeBErAcLrNoLuRnHfRg weight and moles

Compound	Moles		Weight, g
Be₁₂Li₂₄O₁₆P₄Rh₃Tl₅Pb₁₅S₂₂F₄₃Xe₂₃Kr₂₉TaUWSeBErAcLrNoLuRnHfRg

Elemental composition of Be₁₂Li₂₄O₁₆P₄Rh₃Tl₅Pb₁₅S₂₂F₄₃Xe₂₃Kr₂₉TaUWSeBErAcLrNoLuRnHfRg

Element	Symbol	Atomic weight	Atoms	Mass percent
Beryllium	Be	9.012182	12	0.7449
Lithium	Li	6.941	24	1.1474
Oxygen	O	15.9994	16	1.7632
Phosphorus	P	30.973762	4	0.8534
Rhodium	Rh	102.90550	3	2.1264
Thallium	Tl	204.3833	5	7.0389
Lead	Pb	207.2	15	21.4076
Sulfur	S	32.065	22	4.8589
Fluorine	F	18.9984032	43	5.6270
Xenon	Xe	131.293	23	20.7997
Krypton	Kr	83.798	29	16.7386
Tantalum	Ta	180.94788	1	1.2464
Uranium	U	238.02891	1	1.6395
Tungsten	W	183.84	1	1.2663
Selenium	Se	78.96	1	0.5439
Boron	B	10.811	1	0.0745
Erbium	Er	167.259	1	1.1521
Actinium	Ac	227.027752	1	1.5637
Lawrencium	Lr	262.1096	1	1.8054
Nobelium	No	259.1010	1	1.7847
Lutetium	Lu	174.9668	1	1.2052
Radon	Rn	210.990601	1	1.4533
Hafnium	Hf	178.49	1	1.2294
Roentgenium	Rg	280.1645	1	1.9297

Computing molar mass step by step
First, compute the number of each atom in Be₁₂Li₂₄O₁₆P₄Rh₃Tl₅Pb₁₅S₂₂F₄₃Xe₂₃Kr₂₉TaUWSeBErAcLrNoLuRnHfRg: Be: 12, Li: 24, O: 16, P: 4, Rh: 3, Tl: 5, Pb: 15, S: 22, F: 43, Xe: 23, Kr: 29, Ta: 1, U: 1, W: 1, Se: 1, B: 1, Er: 1, Ac: 1, Lr: 1, No: 1, Lu: 1, Rn: 1, Hf: 1, Rg: 1 Then, lookup atomic weights for each element in periodic table: Be: 9.012182, Li: 6.941, O: 15.9994, P: 30.973762, Rh: 102.9055, Tl: 204.3833, Pb: 207.2, S: 32.065, F: 18.9984032, Xe: 131.293, Kr: 83.798, Ta: 180.94788, U: 238.02891, W: 183.84, Se: 78.96, B: 10.811, Er: 167.259, Ac: 227.0277521, Lr: 262.10963, No: 259.10103, Lu: 174.9668, Rn: 210.990601, Hf: 178.49, Rg: 280.16447 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Be₁₂Li₂₄O₁₆P₄Rh₃Tl₅Pb₁₅S₂₂F₄₃Xe₂₃Kr₂₉TaUWSeBErAcLrNoLuRnHfRg) = ∑ Count_i * Weight_i = Count(Be) * Weight(Be) + Count(Li) * Weight(Li) + Count(O) * Weight(O) + Count(P) * Weight(P) + Count(Rh) * Weight(Rh) + Count(Tl) * Weight(Tl) + Count(Pb) * Weight(Pb) + Count(S) * Weight(S) + Count(F) * Weight(F) + Count(Xe) * Weight(Xe) + Count(Kr) * Weight(Kr) + Count(Ta) * Weight(Ta) + Count(U) * Weight(U) + Count(W) * Weight(W) + Count(Se) * Weight(Se) + Count(B) * Weight(B) + Count(Er) * Weight(Er) + Count(Ac) * Weight(Ac) + Count(Lr) * Weight(Lr) + Count(No) * Weight(No) + Count(Lu) * Weight(Lu) + Count(Rn) * Weight(Rn) + Count(Hf) * Weight(Hf) + Count(Rg) * Weight(Rg) = 12 * 9.012182 + 24 * 6.941 + 16 * 15.9994 + 4 * 30.973762 + 3 * 102.9055 + 5 * 204.3833 + 15 * 207.2 + 22 * 32.065 + 43 * 18.9984032 + 23 * 131.293 + 29 * 83.798 + 1 * 180.94788 + 1 * 238.02891 + 1 * 183.84 + 1 * 78.96 + 1 * 10.811 + 1 * 167.259 + 1 * 227.0277521 + 1 * 262.10963 + 1 * 259.10103 + 1 * 174.9668 + 1 * 210.990601 + 1 * 178.49 + 1 * 280.16447 = 14518.1880 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is AcBBe₁₂ErF₄₃HfKr₂₉Li₂₄LrLuNoO₁₆P₄Pb₁₅RgRh₃RnS₂₂SeTaTl₅UWXe₂₃

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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