Al5As9C20O70Zn4P14F38N34Ar6Br18B6Li9Be23Si2Xe5Ne9Ge6Po90Pt2H molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂H is 26604.9570 g/mol

Convert between Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂H weight and moles

Compound	Moles		Weight, g
Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂H

Elemental composition of Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂H

Element	Symbol	Atomic weight	Atoms	Mass percent
Aluminum	Al	26.9815386	5	0.5071
Arsenic	As	74.92160	9	2.5345
Carbon	C	12.0107	20	0.9029
Oxygen	O	15.9994	70	4.2096
Zinc	Zn	65.38	4	0.9830
Phosphorus	P	30.973762	14	1.6299
Fluorine	F	18.9984032	38	2.7136
Nitrogen	N	14.0067	34	1.7900
Argon	Ar	39.948	6	0.9009
Bromine	Br	79.904	18	5.4060
Boron	B	10.811	6	0.2438
Lithium	Li	6.941	9	0.2348
Beryllium	Be	9.012182	23	0.7791
Silicon	Si	28.0855	2	0.2111
Xenon	Xe	131.293	5	2.4675
Neon	Ne	20.1797	9	0.6826
Germanium	Ge	72.64	6	1.6382
Polonium	Po	208.982430	90	70.6952
Platinum	Pt	195.084	2	1.4665
Hydrogen	H	1.00794	1	0.0038

Computing molar mass step by step
First, compute the number of each atom in Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂H: 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: 2, H: 1 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, H: 1.00794 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Al₅As₉C₂₀O₇₀Zn₄P₁₄F₃₈N₃₄Ar₆Br₁₈B₆Li₉Be₂₃Si₂Xe₅Ne₉Ge₆Po₉₀Pt₂H) = ∑ 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) + Count(H) * Weight(H) = 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 + 2 * 195.084 + 1 * 1.00794 = 26604.9570 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₂₀HAl₅Ar₆As₉B₆Be₂₃Br₁₈F₃₈Ge₆Li₉N₃₄Ne₉O₇₀P₁₄Po₉₀Pt₂Si₂Xe₅Zn₄

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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