N2O5Au2S7Fe2K44Pt3PB8Ru4BI9PO2Ra9CO3H400Br5Kr3He28Ar6P4Ti84 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of N₂O₅Au₂S₇Fe₂K₄₄Pt₃PB₈Ru₄BI₉PO₂Ra₉CO₃H₄₀₀Br₅Kr₃He₂₈Ar₆P₄Ti₈₄ is 12526.1428 g/mol

Convert between N₂O₅Au₂S₇Fe₂K₄₄Pt₃PB₈Ru₄BI₉PO₂Ra₉CO₃H₄₀₀Br₅Kr₃He₂₈Ar₆P₄Ti₈₄ weight and moles

Compound	Moles		Weight, g
N₂O₅Au₂S₇Fe₂K₄₄Pt₃PB₈Ru₄BI₉PO₂Ra₉CO₃H₄₀₀Br₅Kr₃He₂₈Ar₆P₄Ti₈₄

Elemental composition of N₂O₅Au₂S₇Fe₂K₄₄Pt₃PB₈Ru₄BI₉PO₂Ra₉CO₃H₄₀₀Br₅Kr₃He₂₈Ar₆P₄Ti₈₄

Element	Symbol	Atomic weight	Atoms	Mass percent
Nitrogen	N	14.0067	2	0.2236
Oxygen	O	15.9994	10	1.2773
Gold	Au	196.966569	2	3.1449
Sulfur	S	32.065	7	1.7919
Iron	Fe	55.845	2	0.8917
Potassium	K	39.0983	44	13.7339
Platinum	Pt	195.084	3	4.6722
Phosphorus	P	30.973762	6	1.4836
Boron	B	10.811	9	0.7768
Ruthenium	Ru	101.07	4	3.2275
Iodine	I	126.90447	9	9.1181
Radium	Ra	226.025410	9	16.2399
Carbon	C	12.0107	1	0.0959
Hydrogen	H	1.00794	400	3.2187
Bromine	Br	79.904	5	3.1895
Krypton	Kr	83.798	3	2.0070
Helium	He	4.002602	28	0.8947
Argon	Ar	39.948	6	1.9135
Titanium	Ti	47.867	84	32.0995

Computing molar mass step by step
First, compute the number of each atom in N₂O₅Au₂S₇Fe₂K₄₄Pt₃PB₈Ru₄BI₉PO₂Ra₉CO₃H₄₀₀Br₅Kr₃He₂₈Ar₆P₄Ti₈₄: N: 2, O: 10, Au: 2, S: 7, Fe: 2, K: 44, Pt: 3, P: 6, B: 9, Ru: 4, I: 9, Ra: 9, C: 1, H: 400, Br: 5, Kr: 3, He: 28, Ar: 6, Ti: 84 Then, lookup atomic weights for each element in periodic table: N: 14.0067, O: 15.9994, Au: 196.966569, S: 32.065, Fe: 55.845, K: 39.0983, Pt: 195.084, P: 30.973762, B: 10.811, Ru: 101.07, I: 126.90447, Ra: 226.0254098, C: 12.0107, H: 1.00794, Br: 79.904, Kr: 83.798, He: 4.002602, Ar: 39.948, Ti: 47.867 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (N₂O₅Au₂S₇Fe₂K₄₄Pt₃PB₈Ru₄BI₉PO₂Ra₉CO₃H₄₀₀Br₅Kr₃He₂₈Ar₆P₄Ti₈₄) = ∑ Count_i * Weight_i = Count(N) * Weight(N) + Count(O) * Weight(O) + Count(Au) * Weight(Au) + Count(S) * Weight(S) + Count(Fe) * Weight(Fe) + Count(K) * Weight(K) + Count(Pt) * Weight(Pt) + Count(P) * Weight(P) + Count(B) * Weight(B) + Count(Ru) * Weight(Ru) + Count(I) * Weight(I) + Count(Ra) * Weight(Ra) + Count(C) * Weight(C) + Count(H) * Weight(H) + Count(Br) * Weight(Br) + Count(Kr) * Weight(Kr) + Count(He) * Weight(He) + Count(Ar) * Weight(Ar) + Count(Ti) * Weight(Ti) = 2 * 14.0067 + 10 * 15.9994 + 2 * 196.966569 + 7 * 32.065 + 2 * 55.845 + 44 * 39.0983 + 3 * 195.084 + 6 * 30.973762 + 9 * 10.811 + 4 * 101.07 + 9 * 126.90447 + 9 * 226.0254098 + 1 * 12.0107 + 400 * 1.00794 + 5 * 79.904 + 3 * 83.798 + 28 * 4.002602 + 6 * 39.948 + 84 * 47.867 = 12526.1428 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is CH₄₀₀Ar₆Au₂B₉Br₅Fe₂He₂₈I₉K₄₄Kr₃N₂O₁₀P₆Pt₃Ra₉Ru₄S₇Ti₈₄

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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