Al5As9C20O70Zn4P14F38N34Ar6Br18B6Li9Be23Si2Xe5Ne9Ge6Po90Pt20 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂₀ is 30115.4611 g/mol

Convert between Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂₀ weight and moles

Compound	Moles		Weight, g
Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂₀

Elemental composition of Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂₀

Element	Symbol	Atomic weight	Atoms	Mass percent
Aluminum	Al	26.9815386	5	0.4480
Arsenic	As	74.92160	9	2.2390
Carbon	C	12.0107	20	0.7976
Oxygen	O	15.9994	70	3.7189
Zinc	Zn	65.38	4	0.8684
Phosphorus	P	30.973762	14	1.4399
Fluorine	F	18.9984032	38	2.3972
Nitrogen	N	14.0067	34	1.5813
Argon	Ar	39.948	6	0.7959
Bromine	Br	79.904	18	4.7759
Boron	B	10.811	6	0.2154
Lithium	Li	6.941	9	0.2074
Beryllium	Be	9.012182	23	0.6883
Silicon	Si	28.0855	2	0.1865
Xenon	Xe	131.293	5	2.1798
Neon	Ne	20.1797	9	0.6031
Germanium	Ge	72.64	6	1.4472
Polonium	Po	208.982430	90	62.4544
Platinum	Pt	195.084	20	12.9557

Computing molar mass step by step
First, compute the number of each atom in Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂₀: Al: 5, As: 9, C: 20, O: 70, Zn: 4, P: 14, F: 38, N: 34, Ar: 6, Br: 18, B: 6, Li: 9, Be: 23, Si: 2, Xe: 5, Ne: 9, Ge: 6, Po: 90, Pt: 20 Then, lookup atomic weights for each element in periodic table: Al: 26.9815386, As: 74.9216, C: 12.0107, O: 15.9994, Zn: 65.38, P: 30.973762, F: 18.9984032, N: 14.0067, Ar: 39.948, Br: 79.904, B: 10.811, Li: 6.941, Be: 9.012182, Si: 28.0855, Xe: 131.293, Ne: 20.1797, Ge: 72.64, Po: 208.9824304, Pt: 195.084 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂₀) = ∑ Count_i * Weight_i = Count(Al) * Weight(Al) + Count(As) * Weight(As) + Count(C) * Weight(C) + Count(O) * Weight(O) + Count(Zn) * Weight(Zn) + Count(P) * Weight(P) + Count(F) * Weight(F) + Count(N) * Weight(N) + Count(Ar) * Weight(Ar) + Count(Br) * Weight(Br) + Count(B) * Weight(B) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(Si) * Weight(Si) + Count(Xe) * Weight(Xe) + Count(Ne) * Weight(Ne) + Count(Ge) * Weight(Ge) + Count(Po) * Weight(Po) + Count(Pt) * Weight(Pt) = 5 * 26.9815386 + 9 * 74.9216 + 20 * 12.0107 + 70 * 15.9994 + 4 * 65.38 + 14 * 30.973762 + 38 * 18.9984032 + 34 * 14.0067 + 6 * 39.948 + 18 * 79.904 + 6 * 10.811 + 9 * 6.941 + 23 * 9.012182 + 2 * 28.0855 + 5 * 131.293 + 9 * 20.1797 + 6 * 72.64 + 90 * 208.9824304 + 20 * 195.084 = 30115.4611 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₂₀Al₅Ar₆As₉B₆Be₂₃Br₁₈F₃₈Ge₆Li₉N₃₄Ne₉O₇₀P₁₄Po₉₀Pt₂₀Si₂Xe₅Zn₄

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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