U132Cm15Li28Be4Y12C44N23O34F33Ne45Na34Mg33Al31Si30P29S28Cl27 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of U₁₃₂Cm₁₅Li₂₈Be₄Y₁₂C₄₄N₂₃O₃₄F₃₃Ne₄₅Na₃₄Mg₃₃Al₃₁Si₃₀P₂₉S₂₈Cl₂₇ is 45308.6421 g/mol

Convert between U₁₃₂Cm₁₅Li₂₈Be₄Y₁₂C₄₄N₂₃O₃₄F₃₃Ne₄₅Na₃₄Mg₃₃Al₃₁Si₃₀P₂₉S₂₈Cl₂₇ weight and moles

Compound	Moles		Weight, g
U₁₃₂Cm₁₅Li₂₈Be₄Y₁₂C₄₄N₂₃O₃₄F₃₃Ne₄₅Na₃₄Mg₃₃Al₃₁Si₃₀P₂₉S₂₈Cl₂₇

Elemental composition of U₁₃₂Cm₁₅Li₂₈Be₄Y₁₂C₄₄N₂₃O₃₄F₃₃Ne₄₅Na₃₄Mg₃₃Al₃₁Si₃₀P₂₉S₂₈Cl₂₇

Element	Symbol	Atomic weight	Atoms	Mass percent
Uranium	U	238.02891	132	69.3462
Curium	Cm	243.061389	15	8.0469
Lithium	Li	6.941	28	0.4289
Beryllium	Be	9.012182	4	0.0796
Yttrium	Y	88.90585	12	2.3547
Carbon	C	12.0107	44	1.1664
Nitrogen	N	14.0067	23	0.7110
Oxygen	O	15.9994	34	1.2006
Fluorine	F	18.9984032	33	1.3837
Neon	Ne	20.1797	45	2.0042
Sodium	Na	22.98976928	34	1.7252
Magnesium	Mg	24.3050	33	1.7702
Aluminum	Al	26.9815386	31	1.8461
Silicon	Si	28.0855	30	1.8596
Phosphorus	P	30.973762	29	1.9825
Sulfur	S	32.065	28	1.9816
Chlorine	Cl	35.453	27	2.1127

Computing molar mass step by step
First, compute the number of each atom in U₁₃₂Cm₁₅Li₂₈Be₄Y₁₂C₄₄N₂₃O₃₄F₃₃Ne₄₅Na₃₄Mg₃₃Al₃₁Si₃₀P₂₉S₂₈Cl₂₇: U: 132, Cm: 15, Li: 28, Be: 4, Y: 12, C: 44, N: 23, O: 34, F: 33, Ne: 45, Na: 34, Mg: 33, Al: 31, Si: 30, P: 29, S: 28, Cl: 27 Then, lookup atomic weights for each element in periodic table: U: 238.02891, Cm: 243.0613891, Li: 6.941, Be: 9.012182, Y: 88.90585, C: 12.0107, N: 14.0067, O: 15.9994, F: 18.9984032, Ne: 20.1797, Na: 22.98976928, Mg: 24.305, Al: 26.9815386, Si: 28.0855, P: 30.973762, S: 32.065, Cl: 35.453 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (U₁₃₂Cm₁₅Li₂₈Be₄Y₁₂C₄₄N₂₃O₃₄F₃₃Ne₄₅Na₃₄Mg₃₃Al₃₁Si₃₀P₂₉S₂₈Cl₂₇) = ∑ Count_i * Weight_i = Count(U) * Weight(U) + Count(Cm) * Weight(Cm) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(Y) * Weight(Y) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(F) * Weight(F) + Count(Ne) * Weight(Ne) + Count(Na) * Weight(Na) + Count(Mg) * Weight(Mg) + Count(Al) * Weight(Al) + Count(Si) * Weight(Si) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Cl) * Weight(Cl) = 132 * 238.02891 + 15 * 243.0613891 + 28 * 6.941 + 4 * 9.012182 + 12 * 88.90585 + 44 * 12.0107 + 23 * 14.0067 + 34 * 15.9994 + 33 * 18.9984032 + 45 * 20.1797 + 34 * 22.98976928 + 33 * 24.305 + 31 * 26.9815386 + 30 * 28.0855 + 29 * 30.973762 + 28 * 32.065 + 27 * 35.453 = 45308.6421 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₄₄Al₃₁Be₄Cl₂₇Cm₁₅F₃₃Li₂₈Mg₃₃N₂₃Na₃₄Ne₄₅O₃₄P₂₉S₂₈Si₃₀U₁₃₂Y₁₂

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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