Ga31Ge32As33Se34Br35Kr36Rb37Sr38Y39Zr40Nb41Mo42Tc43Ru44Rh45 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of Ga₃₁Ge₃₂As₃₃Se₃₄Br₃₅Kr₃₆Rb₃₇Sr₃₈Y₃₉Zr₄₀Nb₄₁Mo₄₂Tc₄₃Ru₄₄Rh₄₅ is 50148.7533 g/mol

Convert between Ga₃₁Ge₃₂As₃₃Se₃₄Br₃₅Kr₃₆Rb₃₇Sr₃₈Y₃₉Zr₄₀Nb₄₁Mo₄₂Tc₄₃Ru₄₄Rh₄₅ weight and moles

Compound	Moles		Weight, g
Ga₃₁Ge₃₂As₃₃Se₃₄Br₃₅Kr₃₆Rb₃₇Sr₃₈Y₃₉Zr₄₀Nb₄₁Mo₄₂Tc₄₃Ru₄₄Rh₄₅

Elemental composition of Ga₃₁Ge₃₂As₃₃Se₃₄Br₃₅Kr₃₆Rb₃₇Sr₃₈Y₃₉Zr₄₀Nb₄₁Mo₄₂Tc₄₃Ru₄₄Rh₄₅

Element	Symbol	Atomic weight	Atoms	Mass percent
Gallium	Ga	69.723	31	4.3100
Germanium	Ge	72.64	32	4.6352
Arsenic	As	74.92160	33	4.9302
Selenium	Se	78.96	34	5.3534
Bromine	Br	79.904	35	5.5767
Krypton	Kr	83.798	36	6.0156
Rubidium	Rb	85.4678	37	6.3059
Strontium	Sr	87.62	38	6.6394
Yttrium	Y	88.90585	39	6.9141
Zirconium	Zr	91.224	40	7.2763
Niobium	Nb	92.90638	41	7.5957
Molybdenum	Mo	95.96	42	8.0367
Technetium	Tc	96.906365	43	8.3092
Ruthenium	Ru	101.07	44	8.8678
Rhodium	Rh	102.90550	45	9.2340

Computing molar mass step by step
First, compute the number of each atom in Ga₃₁Ge₃₂As₃₃Se₃₄Br₃₅Kr₃₆Rb₃₇Sr₃₈Y₃₉Zr₄₀Nb₄₁Mo₄₂Tc₄₃Ru₄₄Rh₄₅: Ga: 31, Ge: 32, As: 33, Se: 34, Br: 35, Kr: 36, Rb: 37, Sr: 38, Y: 39, Zr: 40, Nb: 41, Mo: 42, Tc: 43, Ru: 44, Rh: 45 Then, lookup atomic weights for each element in periodic table: Ga: 69.723, Ge: 72.64, As: 74.9216, Se: 78.96, Br: 79.904, Kr: 83.798, Rb: 85.4678, Sr: 87.62, Y: 88.90585, Zr: 91.224, Nb: 92.90638, Mo: 95.96, Tc: 96.906365, Ru: 101.07, Rh: 102.9055 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (Ga₃₁Ge₃₂As₃₃Se₃₄Br₃₅Kr₃₆Rb₃₇Sr₃₈Y₃₉Zr₄₀Nb₄₁Mo₄₂Tc₄₃Ru₄₄Rh₄₅) = ∑ Count_i * Weight_i = Count(Ga) * Weight(Ga) + Count(Ge) * Weight(Ge) + Count(As) * Weight(As) + Count(Se) * Weight(Se) + Count(Br) * Weight(Br) + Count(Kr) * Weight(Kr) + Count(Rb) * Weight(Rb) + Count(Sr) * Weight(Sr) + Count(Y) * Weight(Y) + Count(Zr) * Weight(Zr) + Count(Nb) * Weight(Nb) + Count(Mo) * Weight(Mo) + Count(Tc) * Weight(Tc) + Count(Ru) * Weight(Ru) + Count(Rh) * Weight(Rh) = 31 * 69.723 + 32 * 72.64 + 33 * 74.9216 + 34 * 78.96 + 35 * 79.904 + 36 * 83.798 + 37 * 85.4678 + 38 * 87.62 + 39 * 88.90585 + 40 * 91.224 + 41 * 92.90638 + 42 * 95.96 + 43 * 96.906365 + 44 * 101.07 + 45 * 102.9055 = 50148.7533 g/mol

Mass percent composition	Atomic percent composition

Formula in Hill system is As₃₃Br₃₅Ga₃₁Ge₃₂Kr₃₆Mo₄₂Nb₄₁Rb₃₇Rh₄₅Ru₄₄Se₃₄Sr₃₈Tc₄₃Y₃₉Zr₄₀

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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