H100000He3125C15N5620O3645Na9P4S2ClNi5Au9Ag2Hg3W10Pt20I4 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₁₀₀₀₀₀He₃₁₂₅C₁₅N₅₆₂₀O₃₆₄₅Na₉P₄S₂ClNi₅Au₉Ag₂Hg₃W₁₀Pt₂₀I₄ is 260079.5151 g/mol

Convert between H₁₀₀₀₀₀He₃₁₂₅C₁₅N₅₆₂₀O₃₆₄₅Na₉P₄S₂ClNi₅Au₉Ag₂Hg₃W₁₀Pt₂₀I₄ weight and moles

Compound	Moles		Weight, g
H₁₀₀₀₀₀He₃₁₂₅C₁₅N₅₆₂₀O₃₆₄₅Na₉P₄S₂ClNi₅Au₉Ag₂Hg₃W₁₀Pt₂₀I₄

Elemental composition of H₁₀₀₀₀₀He₃₁₂₅C₁₅N₅₆₂₀O₃₆₄₅Na₉P₄S₂ClNi₅Au₉Ag₂Hg₃W₁₀Pt₂₀I₄

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	100000	38.7551
Helium	He	4.002602	3125	4.8093
Carbon	C	12.0107	15	0.0693
Nitrogen	N	14.0067	5620	30.2668
Oxygen	O	15.9994	3645	22.4231
Sodium	Na	22.98976928	9	0.0796
Phosphorus	P	30.973762	4	0.0476
Sulfur	S	32.065	2	0.0247
Chlorine	Cl	35.453	1	0.0136
Nickel	Ni	58.6934	5	0.1128
Gold	Au	196.966569	9	0.6816
Silver	Ag	107.8682	2	0.0830
Mercury	Hg	200.59	3	0.2314
Tungsten	W	183.84	10	0.7069
Platinum	Pt	195.084	20	1.5002
Iodine	I	126.90447	4	0.1952

Computing molar mass step by step
First, compute the number of each atom in H₁₀₀₀₀₀He₃₁₂₅C₁₅N₅₆₂₀O₃₆₄₅Na₉P₄S₂ClNi₅Au₉Ag₂Hg₃W₁₀Pt₂₀I₄: H: 100000, He: 3125, C: 15, N: 5620, O: 3645, Na: 9, P: 4, S: 2, Cl: 1, Ni: 5, Au: 9, Ag: 2, Hg: 3, W: 10, Pt: 20, I: 4 Then, lookup atomic weights for each element in periodic table: H: 1.00794, He: 4.002602, C: 12.0107, N: 14.0067, O: 15.9994, Na: 22.98976928, P: 30.973762, S: 32.065, Cl: 35.453, Ni: 58.6934, Au: 196.966569, Ag: 107.8682, Hg: 200.59, W: 183.84, Pt: 195.084, I: 126.90447 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₁₀₀₀₀₀He₃₁₂₅C₁₅N₅₆₂₀O₃₆₄₅Na₉P₄S₂ClNi₅Au₉Ag₂Hg₃W₁₀Pt₂₀I₄) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(He) * Weight(He) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(Na) * Weight(Na) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Cl) * Weight(Cl) + Count(Ni) * Weight(Ni) + Count(Au) * Weight(Au) + Count(Ag) * Weight(Ag) + Count(Hg) * Weight(Hg) + Count(W) * Weight(W) + Count(Pt) * Weight(Pt) + Count(I) * Weight(I) = 100000 * 1.00794 + 3125 * 4.002602 + 15 * 12.0107 + 5620 * 14.0067 + 3645 * 15.9994 + 9 * 22.98976928 + 4 * 30.973762 + 2 * 32.065 + 1 * 35.453 + 5 * 58.6934 + 9 * 196.966569 + 2 * 107.8682 + 3 * 200.59 + 10 * 183.84 + 20 * 195.084 + 4 * 126.90447 = 260079.5151 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₁₅H₁₀₀₀₀₀Ag₂Au₉ClHe₃₁₂₅Hg₃I₄N₅₆₂₀Na₉Ni₅O₃₆₄₅P₄Pt₂₀S₂W₁₀

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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