Br27O5C35H7N40PbH500LrBhAg12H50AtRnRaReOsRb3WHfYFrU17PaThLu molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Br₂₇O₅C₃₅H₇N₄₀PbH₅₀₀LrBhAg₁₂H₅₀AtRnRaReOsRb₃WHfYFrU₁₇PaThLu is 12453.9675 g/mol

Convert between Br₂₇O₅C₃₅H₇N₄₀PbH₅₀₀LrBhAg₁₂H₅₀AtRnRaReOsRb₃WHfYFrU₁₇PaThLu weight and moles

Compound	Moles		Weight, g
Br₂₇O₅C₃₅H₇N₄₀PbH₅₀₀LrBhAg₁₂H₅₀AtRnRaReOsRb₃WHfYFrU₁₇PaThLu

Elemental composition of Br₂₇O₅C₃₅H₇N₄₀PbH₅₀₀LrBhAg₁₂H₅₀AtRnRaReOsRb₃WHfYFrU₁₇PaThLu

Element	Symbol	Atomic weight	Atoms	Mass percent
Bromine	Br	79.904	27	17.3231
Oxygen	O	15.9994	5	0.6423
Carbon	C	12.0107	35	3.3754
Hydrogen	H	1.00794	557	4.5080
Nitrogen	N	14.0067	40	4.4987
Lead	Pb	207.2	1	1.6637
Lawrencium	Lr	262.1096	1	2.1046
Bohrium	Bh	272.1380	1	2.1852
Silver	Ag	107.8682	12	10.3936
Astatine	At	209.987148	1	1.6861
Radon	Rn	210.990601	1	1.6942
Radium	Ra	226.025410	1	1.8149
Rhenium	Re	186.207	1	1.4952
Osmium	Os	190.23	1	1.5275
Rubidium	Rb	85.4678	3	2.0588
Tungsten	W	183.84	1	1.4762
Hafnium	Hf	178.49	1	1.4332
Yttrium	Y	88.90585	1	0.7139
Francium	Fr	223.019736	1	1.7908
Uranium	U	238.02891	17	32.4916
Protactinium	Pa	231.03588	1	1.8551
Thorium	Th	232.03806	1	1.8632
Lutetium	Lu	174.9668	1	1.4049

Computing molar mass step by step
First, compute the number of each atom in Br₂₇O₅C₃₅H₇N₄₀PbH₅₀₀LrBhAg₁₂H₅₀AtRnRaReOsRb₃WHfYFrU₁₇PaThLu: Br: 27, O: 5, C: 35, H: 557, N: 40, Pb: 1, Lr: 1, Bh: 1, Ag: 12, At: 1, Rn: 1, Ra: 1, Re: 1, Os: 1, Rb: 3, W: 1, Hf: 1, Y: 1, Fr: 1, U: 17, Pa: 1, Th: 1, Lu: 1 Then, lookup atomic weights for each element in periodic table: Br: 79.904, O: 15.9994, C: 12.0107, H: 1.00794, N: 14.0067, Pb: 207.2, Lr: 262.10963, Bh: 272.13803, Ag: 107.8682, At: 209.987148, Rn: 210.990601, Ra: 226.0254098, Re: 186.207, Os: 190.23, Rb: 85.4678, W: 183.84, Hf: 178.49, Y: 88.90585, Fr: 223.0197359, U: 238.02891, Pa: 231.03588, Th: 232.03806, Lu: 174.9668 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Br₂₇O₅C₃₅H₇N₄₀PbH₅₀₀LrBhAg₁₂H₅₀AtRnRaReOsRb₃WHfYFrU₁₇PaThLu) = ∑ Count_i * Weight_i = Count(Br) * Weight(Br) + Count(O) * Weight(O) + Count(C) * Weight(C) + Count(H) * Weight(H) + Count(N) * Weight(N) + Count(Pb) * Weight(Pb) + Count(Lr) * Weight(Lr) + Count(Bh) * Weight(Bh) + Count(Ag) * Weight(Ag) + Count(At) * Weight(At) + Count(Rn) * Weight(Rn) + Count(Ra) * Weight(Ra) + Count(Re) * Weight(Re) + Count(Os) * Weight(Os) + Count(Rb) * Weight(Rb) + Count(W) * Weight(W) + Count(Hf) * Weight(Hf) + Count(Y) * Weight(Y) + Count(Fr) * Weight(Fr) + Count(U) * Weight(U) + Count(Pa) * Weight(Pa) + Count(Th) * Weight(Th) + Count(Lu) * Weight(Lu) = 27 * 79.904 + 5 * 15.9994 + 35 * 12.0107 + 557 * 1.00794 + 40 * 14.0067 + 1 * 207.2 + 1 * 262.10963 + 1 * 272.13803 + 12 * 107.8682 + 1 * 209.987148 + 1 * 210.990601 + 1 * 226.0254098 + 1 * 186.207 + 1 * 190.23 + 3 * 85.4678 + 1 * 183.84 + 1 * 178.49 + 1 * 88.90585 + 1 * 223.0197359 + 17 * 238.02891 + 1 * 231.03588 + 1 * 232.03806 + 1 * 174.9668 = 12453.9675 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₃₅H₅₅₇Ag₁₂AtBhBr₂₇FrHfLrLuN₄₀O₅OsPaPbRaRb₃ReRnThU₁₇WY

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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