RbHC8H4O4 molar mass

Molar Mass, Molecular Weight and Elemental Composition Calculator

Molar mass of RbHC₈H₄O₄ is 250.5907 g/mol

Convert between RbHC₈H₄O₄ weight and moles

Compound	Moles		Weight, g
RbHC₈H₄O₄

Elemental composition of RbHC₈H₄O₄

Element	Symbol	Atomic weight	Atoms	Mass percent
Rubidium	Rb	85.4678	1	34.1065
Hydrogen	H	1.00794	5	2.0111
Carbon	C	12.0107	8	38.3436
Oxygen	O	15.9994	4	25.5387

Computing molar mass step by step
First, compute the number of each atom in RbHC₈H₄O₄: Rb: 1, H: 5, C: 8, O: 4 Then, lookup atomic weights for each element in periodic table: Rb: 85.4678, H: 1.00794, C: 12.0107, O: 15.9994 Now, compute the sum of products of number of atoms to the atomic weight: Molar mass (RbHC₈H₄O₄) = ∑ Count_i * Weight_i = Count(Rb) * Weight(Rb) + Count(H) * Weight(H) + Count(C) * Weight(C) + Count(O) * Weight(O) = 1 * 85.4678 + 5 * 1.00794 + 8 * 12.0107 + 4 * 15.9994 = 250.5907 g/mol

Mass percent composition	Atomic percent composition

Related compounds

Formula	Compound name
RbHCO₃	Rubidium bicarbonate
RbC₆H₇O₆	Rubidium ascorbate
RbCH₃CO₂	Rubidium acetate
Rb₃C₆H₅O₇	Rubidium citrate
RbC₆H₅COO	Rubidium benzoate

Formula in Hill system is C₈H₅O₄Rb

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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