K4Pu5Na3U7Co9O4C7Np4Cr4Zn6Si3As7P3S2Sn5Sb3Pt5Au7H6He4Ne3 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of K₄Pu₅Na₃U₇Co₉O₄C₇Np₄Cr₄Zn₆Si₃As₇P₃S₂Sn₅Sb₃Pt₅Au₇H₆He₄Ne₃ is 9466.1067 g/mol

Convert between K₄Pu₅Na₃U₇Co₉O₄C₇Np₄Cr₄Zn₆Si₃As₇P₃S₂Sn₅Sb₃Pt₅Au₇H₆He₄Ne₃ weight and moles

Compound	Moles		Weight, g
K₄Pu₅Na₃U₇Co₉O₄C₇Np₄Cr₄Zn₆Si₃As₇P₃S₂Sn₅Sb₃Pt₅Au₇H₆He₄Ne₃

Elemental composition of K₄Pu₅Na₃U₇Co₉O₄C₇Np₄Cr₄Zn₆Si₃As₇P₃S₂Sn₅Sb₃Pt₅Au₇H₆He₄Ne₃

Element	Symbol	Atomic weight	Atoms	Mass percent
Potassium	K	39.0983	4	1.6521
Plutonium	Pu	238.049560	5	12.5738
Sodium	Na	22.98976928	3	0.7286
Uranium	U	238.02891	7	17.6018
Cobalt	Co	58.933195	9	5.6031
Oxygen	O	15.9994	4	0.6761
Carbon	C	12.0107	7	0.8882
Neptunium	Np	236.04657	4	9.9744
Chromium	Cr	51.9961	4	2.1971
Zinc	Zn	65.38	6	4.1440
Silicon	Si	28.0855	3	0.8901
Arsenic	As	74.92160	7	5.5403
Phosphorus	P	30.973762	3	0.9816
Sulfur	S	32.065	2	0.6775
Tin	Sn	118.710	5	6.2703
Antimony	Sb	121.760	3	3.8588
Platinum	Pt	195.084	5	10.3043
Gold	Au	196.966569	7	14.5653
Hydrogen	H	1.00794	6	0.0639
Helium	He	4.002602	4	0.1691
Neon	Ne	20.1797	3	0.6395

Computing molar mass step by step
First, compute the number of each atom in K₄Pu₅Na₃U₇Co₉O₄C₇Np₄Cr₄Zn₆Si₃As₇P₃S₂Sn₅Sb₃Pt₅Au₇H₆He₄Ne₃: K: 4, Pu: 5, Na: 3, U: 7, Co: 9, O: 4, C: 7, Np: 4, Cr: 4, Zn: 6, Si: 3, As: 7, P: 3, S: 2, Sn: 5, Sb: 3, Pt: 5, Au: 7, H: 6, He: 4, Ne: 3 Then, lookup atomic weights for each element in periodic table: K: 39.0983, Pu: 238.0495599, Na: 22.98976928, U: 238.02891, Co: 58.933195, O: 15.9994, C: 12.0107, Np: 236.04657, Cr: 51.9961, Zn: 65.38, Si: 28.0855, As: 74.9216, P: 30.973762, S: 32.065, Sn: 118.71, Sb: 121.76, Pt: 195.084, Au: 196.966569, H: 1.00794, He: 4.002602, Ne: 20.1797 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (K₄Pu₅Na₃U₇Co₉O₄C₇Np₄Cr₄Zn₆Si₃As₇P₃S₂Sn₅Sb₃Pt₅Au₇H₆He₄Ne₃) = ∑ Count_i * Weight_i = Count(K) * Weight(K) + Count(Pu) * Weight(Pu) + Count(Na) * Weight(Na) + Count(U) * Weight(U) + Count(Co) * Weight(Co) + Count(O) * Weight(O) + Count(C) * Weight(C) + Count(Np) * Weight(Np) + Count(Cr) * Weight(Cr) + Count(Zn) * Weight(Zn) + Count(Si) * Weight(Si) + Count(As) * Weight(As) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Sn) * Weight(Sn) + Count(Sb) * Weight(Sb) + Count(Pt) * Weight(Pt) + Count(Au) * Weight(Au) + Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Ne) * Weight(Ne) = 4 * 39.0983 + 5 * 238.0495599 + 3 * 22.98976928 + 7 * 238.02891 + 9 * 58.933195 + 4 * 15.9994 + 7 * 12.0107 + 4 * 236.04657 + 4 * 51.9961 + 6 * 65.38 + 3 * 28.0855 + 7 * 74.9216 + 3 * 30.973762 + 2 * 32.065 + 5 * 118.71 + 3 * 121.76 + 5 * 195.084 + 7 * 196.966569 + 6 * 1.00794 + 4 * 4.002602 + 3 * 20.1797 = 9466.1067 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is C₇H₆As₇Au₇Co₉Cr₄He₄K₄Na₃Ne₃Np₄O₄P₃Pt₅Pu₅S₂Sb₃Si₃Sn₅U₇Zn₆

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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