I56786Ne2268C687H876K786Cl786Mg76876P5Ag5AuAlOI molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of I₅₆₇₈₆Ne₂₂₆₈C₆₈₇H₈₇₆K₇₈₆Cl₇₈₆Mg₇₆₈₇₆P₅Ag₅AuAlOI is 9189428.6629 g/mol

Convert between I₅₆₇₈₆Ne₂₂₆₈C₆₈₇H₈₇₆K₇₈₆Cl₇₈₆Mg₇₆₈₇₆P₅Ag₅AuAlOI weight and moles

Compound	Moles		Weight, g
I₅₆₇₈₆Ne₂₂₆₈C₆₈₇H₈₇₆K₇₈₆Cl₇₈₆Mg₇₆₈₇₆P₅Ag₅AuAlOI

Elemental composition of I₅₆₇₈₆Ne₂₂₆₈C₆₈₇H₈₇₆K₇₈₆Cl₇₈₆Mg₇₆₈₇₆P₅Ag₅AuAlOI

Element	Symbol	Atomic weight	Atoms	Mass percent
Iodine	I	126.90447	56787	78.4219
Neon	Ne	20.1797	2268	0.4980
Carbon	C	12.0107	687	0.0898
Hydrogen	H	1.00794	876	0.0096
Potassium	K	39.0983	786	0.3344
Chlorine	Cl	35.453	786	0.3032
Magnesium	Mg	24.3050	76876	20.3328
Phosphorus	P	30.973762	5	0.0017
Silver	Ag	107.8682	5	0.0059
Gold	Au	196.966569	1	0.0021
Aluminum	Al	26.9815386	1	0.0003
Oxygen	O	15.9994	1	0.0002

Computing molar mass step by step
First, compute the number of each atom in I₅₆₇₈₆Ne₂₂₆₈C₆₈₇H₈₇₆K₇₈₆Cl₇₈₆Mg₇₆₈₇₆P₅Ag₅AuAlOI: I: 56787, Ne: 2268, C: 687, H: 876, K: 786, Cl: 786, Mg: 76876, P: 5, Ag: 5, Au: 1, Al: 1, O: 1 Then, lookup atomic weights for each element in periodic table: I: 126.90447, Ne: 20.1797, C: 12.0107, H: 1.00794, K: 39.0983, Cl: 35.453, Mg: 24.305, P: 30.973762, Ag: 107.8682, Au: 196.966569, Al: 26.9815386, O: 15.9994 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (I₅₆₇₈₆Ne₂₂₆₈C₆₈₇H₈₇₆K₇₈₆Cl₇₈₆Mg₇₆₈₇₆P₅Ag₅AuAlOI) = ∑ Count_i * Weight_i = Count(I) * Weight(I) + Count(Ne) * Weight(Ne) + Count(C) * Weight(C) + Count(H) * Weight(H) + Count(K) * Weight(K) + Count(Cl) * Weight(Cl) + Count(Mg) * Weight(Mg) + Count(P) * Weight(P) + Count(Ag) * Weight(Ag) + Count(Au) * Weight(Au) + Count(Al) * Weight(Al) + Count(O) * Weight(O) = 56787 * 126.90447 + 2268 * 20.1797 + 687 * 12.0107 + 876 * 1.00794 + 786 * 39.0983 + 786 * 35.453 + 76876 * 24.305 + 5 * 30.973762 + 5 * 107.8682 + 1 * 196.966569 + 1 * 26.9815386 + 1 * 15.9994 = 9189428.6629 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₆₈₇H₈₇₆Ag₅AlAuCl₇₈₆I₅₆₇₈₇K₇₈₆Mg₇₆₈₇₆Ne₂₂₆₈OP₅

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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