U50C87S4H10Rb20I15He20Hg35Au23K845Be24Li74Fe84N32Pb36 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of U₅₀C₈₇S₄H₁₀Rb₂₀I₁₅He₂₀Hg₃₅Au₂₃K₈₄₅Be₂₄Li₇₄Fe₈₄N₃₂Pb₃₆ is 74694.9562 g/mol

Convert between U₅₀C₈₇S₄H₁₀Rb₂₀I₁₅He₂₀Hg₃₅Au₂₃K₈₄₅Be₂₄Li₇₄Fe₈₄N₃₂Pb₃₆ weight and moles

Compound	Moles		Weight, g
U₅₀C₈₇S₄H₁₀Rb₂₀I₁₅He₂₀Hg₃₅Au₂₃K₈₄₅Be₂₄Li₇₄Fe₈₄N₃₂Pb₃₆

Elemental composition of U₅₀C₈₇S₄H₁₀Rb₂₀I₁₅He₂₀Hg₃₅Au₂₃K₈₄₅Be₂₄Li₇₄Fe₈₄N₃₂Pb₃₆

Element	Symbol	Atomic weight	Atoms	Mass percent
Uranium	U	238.02891	50	15.9334
Carbon	C	12.0107	87	1.3989
Sulfur	S	32.065	4	0.1717
Hydrogen	H	1.00794	10	0.0135
Rubidium	Rb	85.4678	20	2.2884
Iodine	I	126.90447	15	2.5485
Helium	He	4.002602	20	0.1072
Mercury	Hg	200.59	35	9.3991
Gold	Au	196.966569	23	6.0650
Potassium	K	39.0983	845	44.2306
Beryllium	Be	9.012182	24	0.2896
Lithium	Li	6.941	74	0.6876
Iron	Fe	55.845	84	6.2802
Nitrogen	N	14.0067	32	0.6001
Lead	Pb	207.2	36	9.9862

Computing molar mass step by step
First, compute the number of each atom in U₅₀C₈₇S₄H₁₀Rb₂₀I₁₅He₂₀Hg₃₅Au₂₃K₈₄₅Be₂₄Li₇₄Fe₈₄N₃₂Pb₃₆: U: 50, C: 87, S: 4, H: 10, Rb: 20, I: 15, He: 20, Hg: 35, Au: 23, K: 845, Be: 24, Li: 74, Fe: 84, N: 32, Pb: 36 Then, lookup atomic weights for each element in periodic table: U: 238.02891, C: 12.0107, S: 32.065, H: 1.00794, Rb: 85.4678, I: 126.90447, He: 4.002602, Hg: 200.59, Au: 196.966569, K: 39.0983, Be: 9.012182, Li: 6.941, Fe: 55.845, N: 14.0067, Pb: 207.2 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (U₅₀C₈₇S₄H₁₀Rb₂₀I₁₅He₂₀Hg₃₅Au₂₃K₈₄₅Be₂₄Li₇₄Fe₈₄N₃₂Pb₃₆) = ∑ Count_i * Weight_i = Count(U) * Weight(U) + Count(C) * Weight(C) + Count(S) * Weight(S) + Count(H) * Weight(H) + Count(Rb) * Weight(Rb) + Count(I) * Weight(I) + Count(He) * Weight(He) + Count(Hg) * Weight(Hg) + Count(Au) * Weight(Au) + Count(K) * Weight(K) + Count(Be) * Weight(Be) + Count(Li) * Weight(Li) + Count(Fe) * Weight(Fe) + Count(N) * Weight(N) + Count(Pb) * Weight(Pb) = 50 * 238.02891 + 87 * 12.0107 + 4 * 32.065 + 10 * 1.00794 + 20 * 85.4678 + 15 * 126.90447 + 20 * 4.002602 + 35 * 200.59 + 23 * 196.966569 + 845 * 39.0983 + 24 * 9.012182 + 74 * 6.941 + 84 * 55.845 + 32 * 14.0067 + 36 * 207.2 = 74694.9562 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₈₇H₁₀Au₂₃Be₂₄Fe₈₄He₂₀Hg₃₅I₁₅K₈₄₅Li₇₄N₃₂Pb₃₆Rb₂₀S₄U₅₀

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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