C2O3LiFe3Cu45H7Ca112Sm7Pu3Mg4Be3Y67N78Tb33Ag5He7Xe34Kr4Th55 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of C₂O₃LiFe₃Cu₄₅H₇Ca₁₁₂Sm₇Pu₃Mg₄Be₃Y₆₇N₇₈Tb₃₃Ag₅He₇Xe₃₄Kr₄Th₅₅ is 39915.1400 g/mol

Convert between C₂O₃LiFe₃Cu₄₅H₇Ca₁₁₂Sm₇Pu₃Mg₄Be₃Y₆₇N₇₈Tb₃₃Ag₅He₇Xe₃₄Kr₄Th₅₅ weight and moles

Compound	Moles		Weight, g
C₂O₃LiFe₃Cu₄₅H₇Ca₁₁₂Sm₇Pu₃Mg₄Be₃Y₆₇N₇₈Tb₃₃Ag₅He₇Xe₃₄Kr₄Th₅₅

Elemental composition of C₂O₃LiFe₃Cu₄₅H₇Ca₁₁₂Sm₇Pu₃Mg₄Be₃Y₆₇N₇₈Tb₃₃Ag₅He₇Xe₃₄Kr₄Th₅₅

Element	Symbol	Atomic weight	Atoms	Mass percent
Carbon	C	12.0107	2	0.0602
Oxygen	O	15.9994	3	0.1203
Lithium	Li	6.941	1	0.0174
Iron	Fe	55.845	3	0.4197
Copper	Cu	63.546	45	7.1641
Hydrogen	H	1.00794	7	0.0177
Calcium	Ca	40.078	112	11.2457
Samarium	Sm	150.36	7	2.6369
Plutonium	Pu	238.049560	3	1.7892
Magnesium	Mg	24.3050	4	0.2436
Beryllium	Be	9.012182	3	0.0677
Yttrium	Y	88.90585	67	14.9234
Nitrogen	N	14.0067	78	2.7371
Terbium	Tb	158.92535	33	13.1392
Silver	Ag	107.8682	5	1.3512
Helium	He	4.002602	7	0.0702
Xenon	Xe	131.293	34	11.1836
Krypton	Kr	83.798	4	0.8398
Thorium	Th	232.03806	55	31.9731

Computing molar mass step by step
First, compute the number of each atom in C₂O₃LiFe₃Cu₄₅H₇Ca₁₁₂Sm₇Pu₃Mg₄Be₃Y₆₇N₇₈Tb₃₃Ag₅He₇Xe₃₄Kr₄Th₅₅: C: 2, O: 3, Li: 1, Fe: 3, Cu: 45, H: 7, Ca: 112, Sm: 7, Pu: 3, Mg: 4, Be: 3, Y: 67, N: 78, Tb: 33, Ag: 5, He: 7, Xe: 34, Kr: 4, Th: 55 Then, lookup atomic weights for each element in periodic table: C: 12.0107, O: 15.9994, Li: 6.941, Fe: 55.845, Cu: 63.546, H: 1.00794, Ca: 40.078, Sm: 150.36, Pu: 238.0495599, Mg: 24.305, Be: 9.012182, Y: 88.90585, N: 14.0067, Tb: 158.92535, Ag: 107.8682, He: 4.002602, Xe: 131.293, Kr: 83.798, Th: 232.03806 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (C₂O₃LiFe₃Cu₄₅H₇Ca₁₁₂Sm₇Pu₃Mg₄Be₃Y₆₇N₇₈Tb₃₃Ag₅He₇Xe₃₄Kr₄Th₅₅) = ∑ Count_i * Weight_i = Count(C) * Weight(C) + Count(O) * Weight(O) + Count(Li) * Weight(Li) + Count(Fe) * Weight(Fe) + Count(Cu) * Weight(Cu) + Count(H) * Weight(H) + Count(Ca) * Weight(Ca) + Count(Sm) * Weight(Sm) + Count(Pu) * Weight(Pu) + Count(Mg) * Weight(Mg) + Count(Be) * Weight(Be) + Count(Y) * Weight(Y) + Count(N) * Weight(N) + Count(Tb) * Weight(Tb) + Count(Ag) * Weight(Ag) + Count(He) * Weight(He) + Count(Xe) * Weight(Xe) + Count(Kr) * Weight(Kr) + Count(Th) * Weight(Th) = 2 * 12.0107 + 3 * 15.9994 + 1 * 6.941 + 3 * 55.845 + 45 * 63.546 + 7 * 1.00794 + 112 * 40.078 + 7 * 150.36 + 3 * 238.0495599 + 4 * 24.305 + 3 * 9.012182 + 67 * 88.90585 + 78 * 14.0067 + 33 * 158.92535 + 5 * 107.8682 + 7 * 4.002602 + 34 * 131.293 + 4 * 83.798 + 55 * 232.03806 = 39915.1400 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₂H₇Ag₅Be₃Ca₁₁₂Cu₄₅Fe₃He₇Kr₄LiMg₄N₇₈O₃Pu₃Sm₇Tb₃₃Th₅₅Xe₃₄Y₆₇

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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