01-05-2021

Atomic Mass Of Ca



Molar Mass, Molecular Weight and Elemental Composition Calculator

Atomic Mass of Calcium. Atomic mass of Calcium is 40.078 u. The atomic mass is the mass of an atom. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. 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. Weights of atoms and isotopes are from NIST article.


Molar mass of Ca is 40.0780 g/mol
Compound name is calcium
Convert between Ca weight and moles
CompoundMolesWeight, g
Ca

Elemental composition of Ca
ElementSymbolAtomic weightAtomsMass percent
CalciumCa40.0781100.0000

Mass percent compositionAtomic percent composition

Sample reactions for Ca
EquationReaction type
Ca + H2O = Ca(OH)2 + H2single replacement
Ca + O2 = CaOsynthesis
Ca + AlCl3 = CaCl2 + Alsingle replacement
Ca + HCl = CaCl2 + H2single replacement
Ca + Cl2 = CaCl2synthesis

Formula in Hill system is Ca

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, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg
  • parantesis () or brackets [].
  • Common compound names.
Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, water, nitric acid, potassium permanganate, ethanol, fructose.
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 of molecular mass, molecular weight, molar mass and molar weight

  • 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.
Weights of atoms and isotopes are from NIST article.
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Atomic Mass Of Ca2

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IsotopeAtomic mass (Da)Isotopic abundance (amount fraction)
40Ca39.962 5909(2)0.969 41(156)
42Ca 41.958 618(1)0.006 47(23)
43Ca 42.958 766(2)0.001 35(10)
44Ca 43.955 482(2)0.020 86(110)
46Ca 45.953 69(2)0.000 04(3)
48Ca 47.952 5229(6)0.001 87(21)
Atomic mass of carbon

Mocha pro for mac os. In 1983, the Commission with its liberalized policy on uncertainties,was able to recommend as standard atomic weight Ar(Ca) = 40.078(4) weighted toward the mass-spectrometricmeasurements. Moreover, the stated uncertainty includes all chemical,x-ray, and mass-spectrometric measurements believed to be significant by the Commission, as enumerated inits 1983 report.

Atomic Mass Of Carbon 12

There is evidence for minor isotope fractionation of calcium in Nature, causing variability ofAr(Ca) in normal sources that is within the uncertainty of the standard atomic weight. Variations inn(44Ca)/n(40Ca) can be reported as δ44Ca values relative to the calcium carbonate reference materialNIST-SRM 915a. A recent compilation yielded a range of published δ44Ca values in naturalsamples from a low of -2.17 ‰ in a cougar bone with Ar(Ca) = 40.0778 to a high of +2.76 ‰ in egg white with Ar(Ca) = 40.0784.Elemental calcium with as δ44Ca = -6.0 ‰ (Ar(Ca) = 40.0773) also has beenreported. Variations in the isotopic composition of marine calcium have occurred over the last 80 Ma.

In addition, there are many reports of anomalous isotopic composition of some minor samples of Ca, some of which may have arisen from the decay of 40K to 40Ca. The annotation 'g' is therefore maintained for this element. 41Ca is an extinct radioisotope (with a half-life of 0.1 Ma), which can be used to date the early history of the solar system through itsdecay to 41K.

SOURCEAtomic weights of the elements: Review 2000 by John R de Laeter et al. Pure Appl. Chem. 2003 (75) 683-800
© IUPAC 2003

Atomic Mass Of Carbon 13

CIAAW

Calcium
Ar(Ca) = 40.078(4) since 1983
The name derives from the Latin calx for 'lime' (CaO) or 'limestone' (CaCO3) in which it was found.It was first isolated by British chemist Humphry Davy in 1808 with help from the Swedish chemist JönsJacob Berzelius and the Swedish court physician M. M. af Pontin.

Atomic Mass Of Cai2

Isotopic reference materials of calcium.