H40C34O17N10S6F6Cl6Br3I2P8B3Se5Al7Ta2Au5W3Li4Be3K5Y2Si3Sc7Ti molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₄₀C₃₄O₁₇N₁₀S₆F₆Cl₆Br₃I₂P₈B₃Se₅Al₇Ta₂Au₅W₃Li₄Be₃K₅Y₂Si₃Sc₇Ti is 5510.4187 g/mol

Convert between H₄₀C₃₄O₁₇N₁₀S₆F₆Cl₆Br₃I₂P₈B₃Se₅Al₇Ta₂Au₅W₃Li₄Be₃K₅Y₂Si₃Sc₇Ti weight and moles

Compound	Moles		Weight, g
H₄₀C₃₄O₁₇N₁₀S₆F₆Cl₆Br₃I₂P₈B₃Se₅Al₇Ta₂Au₅W₃Li₄Be₃K₅Y₂Si₃Sc₇Ti

Elemental composition of H₄₀C₃₄O₁₇N₁₀S₆F₆Cl₆Br₃I₂P₈B₃Se₅Al₇Ta₂Au₅W₃Li₄Be₃K₅Y₂Si₃Sc₇Ti

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	40	0.7317
Carbon	C	12.0107	34	7.4108
Oxygen	O	15.9994	17	4.9359
Nitrogen	N	14.0067	10	2.5419
Sulfur	S	32.065	6	3.4914
Fluorine	F	18.9984032	6	2.0686
Chlorine	Cl	35.453	6	3.8603
Bromine	Br	79.904	3	4.3502
Iodine	I	126.90447	2	4.6060
Phosphorus	P	30.973762	8	4.4968
Boron	B	10.811	3	0.5886
Selenium	Se	78.96	5	7.1646
Aluminum	Al	26.9815386	7	3.4275
Tantalum	Ta	180.94788	2	6.5675
Gold	Au	196.966569	5	17.8722
Tungsten	W	183.84	3	10.0087
Lithium	Li	6.941	4	0.5038
Beryllium	Be	9.012182	3	0.4906
Potassium	K	39.0983	5	3.5477
Yttrium	Y	88.90585	2	3.2268
Silicon	Si	28.0855	3	1.5290
Scandium	Sc	44.955912	7	5.7108
Titanium	Ti	47.867	1	0.8687

Computing molar mass step by step
First, compute the number of each atom in H₄₀C₃₄O₁₇N₁₀S₆F₆Cl₆Br₃I₂P₈B₃Se₅Al₇Ta₂Au₅W₃Li₄Be₃K₅Y₂Si₃Sc₇Ti: H: 40, C: 34, O: 17, N: 10, S: 6, F: 6, Cl: 6, Br: 3, I: 2, P: 8, B: 3, Se: 5, Al: 7, Ta: 2, Au: 5, W: 3, Li: 4, Be: 3, K: 5, Y: 2, Si: 3, Sc: 7, Ti: 1 Then, lookup atomic weights for each element in periodic table: H: 1.00794, C: 12.0107, O: 15.9994, N: 14.0067, S: 32.065, F: 18.9984032, Cl: 35.453, Br: 79.904, I: 126.90447, P: 30.973762, B: 10.811, Se: 78.96, Al: 26.9815386, Ta: 180.94788, Au: 196.966569, W: 183.84, Li: 6.941, Be: 9.012182, K: 39.0983, Y: 88.90585, Si: 28.0855, Sc: 44.955912, Ti: 47.867 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₄₀C₃₄O₁₇N₁₀S₆F₆Cl₆Br₃I₂P₈B₃Se₅Al₇Ta₂Au₅W₃Li₄Be₃K₅Y₂Si₃Sc₇Ti) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(C) * Weight(C) + Count(O) * Weight(O) + Count(N) * Weight(N) + Count(S) * Weight(S) + Count(F) * Weight(F) + Count(Cl) * Weight(Cl) + Count(Br) * Weight(Br) + Count(I) * Weight(I) + Count(P) * Weight(P) + Count(B) * Weight(B) + Count(Se) * Weight(Se) + Count(Al) * Weight(Al) + Count(Ta) * Weight(Ta) + Count(Au) * Weight(Au) + Count(W) * Weight(W) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(K) * Weight(K) + Count(Y) * Weight(Y) + Count(Si) * Weight(Si) + Count(Sc) * Weight(Sc) + Count(Ti) * Weight(Ti) = 40 * 1.00794 + 34 * 12.0107 + 17 * 15.9994 + 10 * 14.0067 + 6 * 32.065 + 6 * 18.9984032 + 6 * 35.453 + 3 * 79.904 + 2 * 126.90447 + 8 * 30.973762 + 3 * 10.811 + 5 * 78.96 + 7 * 26.9815386 + 2 * 180.94788 + 5 * 196.966569 + 3 * 183.84 + 4 * 6.941 + 3 * 9.012182 + 5 * 39.0983 + 2 * 88.90585 + 3 * 28.0855 + 7 * 44.955912 + 1 * 47.867 = 5510.4187 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₃₄H₄₀Al₇Au₅B₃Be₃Br₃Cl₆F₆I₂K₅Li₄N₁₀O₁₇P₈S₆Sc₇Se₅Si₃Ta₂TiW₃Y₂

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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