C2H7O3Fe12H4Zn3K8Mg5Ag43Ar5He4Li7Be13B17 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of C₂H₇O₃Fe₁₂H₄Zn₃K₈Mg₅Ag₄₃Ar₅He₄Li₇Be₁₃B₁₇ is 6587.3137 g/mol

Convert between C₂H₇O₃Fe₁₂H₄Zn₃K₈Mg₅Ag₄₃Ar₅He₄Li₇Be₁₃B₁₇ weight and moles

Compound	Moles		Weight, g
C₂H₇O₃Fe₁₂H₄Zn₃K₈Mg₅Ag₄₃Ar₅He₄Li₇Be₁₃B₁₇

Elemental composition of C₂H₇O₃Fe₁₂H₄Zn₃K₈Mg₅Ag₄₃Ar₅He₄Li₇Be₁₃B₁₇

Element	Symbol	Atomic weight	Atoms	Mass percent
Carbon	C	12.0107	2	0.3647
Hydrogen	H	1.00794	11	0.1683
Oxygen	O	15.9994	3	0.7286
Iron	Fe	55.845	12	10.1732
Zinc	Zn	65.38	3	2.9775
Potassium	K	39.0983	8	4.7483
Magnesium	Mg	24.3050	5	1.8448
Silver	Ag	107.8682	43	70.4131
Argon	Ar	39.948	5	3.0322
Helium	He	4.002602	4	0.2430
Lithium	Li	6.941	7	0.7376
Beryllium	Be	9.012182	13	1.7785
Boron	B	10.811	17	2.7900

Computing molar mass step by step
First, compute the number of each atom in C₂H₇O₃Fe₁₂H₄Zn₃K₈Mg₅Ag₄₃Ar₅He₄Li₇Be₁₃B₁₇: C: 2, H: 11, O: 3, Fe: 12, Zn: 3, K: 8, Mg: 5, Ag: 43, Ar: 5, He: 4, Li: 7, Be: 13, B: 17 Then, lookup atomic weights for each element in periodic table: C: 12.0107, H: 1.00794, O: 15.9994, Fe: 55.845, Zn: 65.38, K: 39.0983, Mg: 24.305, Ag: 107.8682, Ar: 39.948, He: 4.002602, Li: 6.941, Be: 9.012182, B: 10.811 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (C₂H₇O₃Fe₁₂H₄Zn₃K₈Mg₅Ag₄₃Ar₅He₄Li₇Be₁₃B₁₇) = ∑ Count_i * Weight_i = Count(C) * Weight(C) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(Fe) * Weight(Fe) + Count(Zn) * Weight(Zn) + Count(K) * Weight(K) + Count(Mg) * Weight(Mg) + Count(Ag) * Weight(Ag) + Count(Ar) * Weight(Ar) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(B) * Weight(B) = 2 * 12.0107 + 11 * 1.00794 + 3 * 15.9994 + 12 * 55.845 + 3 * 65.38 + 8 * 39.0983 + 5 * 24.305 + 43 * 107.8682 + 5 * 39.948 + 4 * 4.002602 + 7 * 6.941 + 13 * 9.012182 + 17 * 10.811 = 6587.3137 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₂H₁₁Ag₄₃Ar₅B₁₇Be₁₃Fe₁₂He₄K₈Li₇Mg₅O₃Zn₃

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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