Se9K5Si5Fe5Au2AgH71N10C11Xe3UupUusHe55Ba8Y7Fr5Ca9Cu8O12 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Se₉K₅Si₅Fe₅Au₂AgH₇₁N₁₀C₁₁Xe₃UupUusHe₅₅Ba₈Y₇Fr₅Ca₉Cu₈O₁₂ is 7262.8744 g/mol

Convert between Se₉K₅Si₅Fe₅Au₂AgH₇₁N₁₀C₁₁Xe₃UupUusHe₅₅Ba₈Y₇Fr₅Ca₉Cu₈O₁₂ weight and moles

Compound	Moles		Weight, g
Se₉K₅Si₅Fe₅Au₂AgH₇₁N₁₀C₁₁Xe₃UupUusHe₅₅Ba₈Y₇Fr₅Ca₉Cu₈O₁₂

Elemental composition of Se₉K₅Si₅Fe₅Au₂AgH₇₁N₁₀C₁₁Xe₃UupUusHe₅₅Ba₈Y₇Fr₅Ca₉Cu₈O₁₂

Element	Symbol	Atomic weight	Atoms	Mass percent
Selenium	Se	78.96	9	9.7846
Potassium	K	39.0983	5	2.6917
Silicon	Si	28.0855	5	1.9335
Iron	Fe	55.845	5	3.8446
Gold	Au	196.966569	2	5.4239
Silver	Ag	107.8682	1	1.4852
Hydrogen	H	1.00794	71	0.9853
Nitrogen	N	14.0067	10	1.9285
Carbon	C	12.0107	11	1.8191
Xenon	Xe	131.293	3	5.4232
Moscovium	Uup	288.1925	1	3.9680
Tennessine	Uus	292.208	1	4.0233
Helium	He	4.002602	55	3.0311
Barium	Ba	137.327	8	15.1265
Yttrium	Y	88.90585	7	8.5688
Francium	Fr	223.019736	5	15.3534
Calcium	Ca	40.078	9	4.9664
Copper	Cu	63.546	8	6.9995
Oxygen	O	15.9994	12	2.6435

Computing molar mass step by step
First, compute the number of each atom in Se₉K₅Si₅Fe₅Au₂AgH₇₁N₁₀C₁₁Xe₃UupUusHe₅₅Ba₈Y₇Fr₅Ca₉Cu₈O₁₂: Se: 9, K: 5, Si: 5, Fe: 5, Au: 2, Ag: 1, H: 71, N: 10, C: 11, Xe: 3, Uup: 1, Uus: 1, He: 55, Ba: 8, Y: 7, Fr: 5, Ca: 9, Cu: 8, O: 12 Then, lookup atomic weights for each element in periodic table: Se: 78.96, K: 39.0983, Si: 28.0855, Fe: 55.845, Au: 196.966569, Ag: 107.8682, H: 1.00794, N: 14.0067, C: 12.0107, Xe: 131.293, Uup: 288.19249, Uus: 292.20755, He: 4.002602, Ba: 137.327, Y: 88.90585, Fr: 223.0197359, Ca: 40.078, Cu: 63.546, O: 15.9994 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Se₉K₅Si₅Fe₅Au₂AgH₇₁N₁₀C₁₁Xe₃UupUusHe₅₅Ba₈Y₇Fr₅Ca₉Cu₈O₁₂) = ∑ Count_i * Weight_i = Count(Se) * Weight(Se) + Count(K) * Weight(K) + Count(Si) * Weight(Si) + Count(Fe) * Weight(Fe) + Count(Au) * Weight(Au) + Count(Ag) * Weight(Ag) + Count(H) * Weight(H) + Count(N) * Weight(N) + Count(C) * Weight(C) + Count(Xe) * Weight(Xe) + Count(Uup) * Weight(Uup) + Count(Uus) * Weight(Uus) + Count(He) * Weight(He) + Count(Ba) * Weight(Ba) + Count(Y) * Weight(Y) + Count(Fr) * Weight(Fr) + Count(Ca) * Weight(Ca) + Count(Cu) * Weight(Cu) + Count(O) * Weight(O) = 9 * 78.96 + 5 * 39.0983 + 5 * 28.0855 + 5 * 55.845 + 2 * 196.966569 + 1 * 107.8682 + 71 * 1.00794 + 10 * 14.0067 + 11 * 12.0107 + 3 * 131.293 + 1 * 288.19249 + 1 * 292.20755 + 55 * 4.002602 + 8 * 137.327 + 7 * 88.90585 + 5 * 223.0197359 + 9 * 40.078 + 8 * 63.546 + 12 * 15.9994 = 7262.8744 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₁₁H₇₁AgAu₂Ba₈Ca₉Cu₈Fe₅Fr₅He₅₅K₅N₁₀O₁₂Se₉Si₅UupUusXe₃Y₇

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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