H2He4Li6Na7U77Po898Ra88Y78K3Zn8P88Sn33Fr378C3N8O76Xe9 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of H₂He₄Li₆Na₇U₇₇Po₈₉₈Ra₈₈Y₇₈K₃Zn₈P₈₈Sn₃₃Fr₃₇₈C₃N₈O₇₆Xe₉ is 327170.5348 g/mol

Convert between H₂He₄Li₆Na₇U₇₇Po₈₉₈Ra₈₈Y₇₈K₃Zn₈P₈₈Sn₃₃Fr₃₇₈C₃N₈O₇₆Xe₉ weight and moles

Compound	Moles		Weight, g
H₂He₄Li₆Na₇U₇₇Po₈₉₈Ra₈₈Y₇₈K₃Zn₈P₈₈Sn₃₃Fr₃₇₈C₃N₈O₇₆Xe₉

Elemental composition of H₂He₄Li₆Na₇U₇₇Po₈₉₈Ra₈₈Y₇₈K₃Zn₈P₈₈Sn₃₃Fr₃₇₈C₃N₈O₇₆Xe₉

Element	Symbol	Atomic weight	Atoms	Mass percent
Hydrogen	H	1.00794	2	0.0006
Helium	He	4.002602	4	0.0049
Lithium	Li	6.941	6	0.0127
Sodium	Na	22.98976928	7	0.0492
Uranium	U	238.02891	77	5.6020
Polonium	Po	208.982430	898	57.3604
Radium	Ra	226.025410	88	6.0795
Yttrium	Y	88.90585	78	2.1196
Potassium	K	39.0983	3	0.0359
Zinc	Zn	65.38	8	0.1599
Phosphorus	P	30.973762	88	0.8331
Tin	Sn	118.710	33	1.1974
Francium	Fr	223.019736	378	25.7668
Carbon	C	12.0107	3	0.0110
Nitrogen	N	14.0067	8	0.0342
Oxygen	O	15.9994	76	0.3717
Xenon	Xe	131.293	9	0.3612

Computing molar mass step by step
First, compute the number of each atom in H₂He₄Li₆Na₇U₇₇Po₈₉₈Ra₈₈Y₇₈K₃Zn₈P₈₈Sn₃₃Fr₃₇₈C₃N₈O₇₆Xe₉: H: 2, He: 4, Li: 6, Na: 7, U: 77, Po: 898, Ra: 88, Y: 78, K: 3, Zn: 8, P: 88, Sn: 33, Fr: 378, C: 3, N: 8, O: 76, Xe: 9 Then, lookup atomic weights for each element in periodic table: H: 1.00794, He: 4.002602, Li: 6.941, Na: 22.98976928, U: 238.02891, Po: 208.9824304, Ra: 226.0254098, Y: 88.90585, K: 39.0983, Zn: 65.38, P: 30.973762, Sn: 118.71, Fr: 223.0197359, C: 12.0107, N: 14.0067, O: 15.9994, Xe: 131.293 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (H₂He₄Li₆Na₇U₇₇Po₈₉₈Ra₈₈Y₇₈K₃Zn₈P₈₈Sn₃₃Fr₃₇₈C₃N₈O₇₆Xe₉) = ∑ Count_i * Weight_i = Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Na) * Weight(Na) + Count(U) * Weight(U) + Count(Po) * Weight(Po) + Count(Ra) * Weight(Ra) + Count(Y) * Weight(Y) + Count(K) * Weight(K) + Count(Zn) * Weight(Zn) + Count(P) * Weight(P) + Count(Sn) * Weight(Sn) + Count(Fr) * Weight(Fr) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(Xe) * Weight(Xe) = 2 * 1.00794 + 4 * 4.002602 + 6 * 6.941 + 7 * 22.98976928 + 77 * 238.02891 + 898 * 208.9824304 + 88 * 226.0254098 + 78 * 88.90585 + 3 * 39.0983 + 8 * 65.38 + 88 * 30.973762 + 33 * 118.71 + 378 * 223.0197359 + 3 * 12.0107 + 8 * 14.0067 + 76 * 15.9994 + 9 * 131.293 = 327170.5348 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₃H₂Fr₃₇₈He₄K₃Li₆N₈Na₇O₇₆P₈₈Po₈₉₈Ra₈₈Sn₃₃U₇₇Xe₉Y₇₈Zn₈

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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