Avogadro's number


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Related to Avogadro's number: Avogadro's constant

Avogadro's number

n.
The number of items in a mole, approximately 6.0221 × 1023. Also called Avogadro constant.

[After Amedeo Avogadro.]

A′voga′dro's num′ber


n.
the constant, 6.02 x 1023, representing the number of atoms in a gram atom or the number of molecules in a gram molecule. Symbol: N Also called A′voga′dro con`stant.
[1925–30; after A. Avogadro]

Avogadro's number

The number of atoms or molecules in a mole of a substance, approximately 6.0225 × 1023. See more at mole3.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Avogadro's number - the number of molecules in a mole of a substance (approximately 602,250,000,000,000,000,000,000)
constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"
References in periodicals archive ?
where N0 is Avogadro's number, Mw is weight average molecular weight, which can be measured through a GPC, and [[eta]] is the intrinsic viscosity which can be calculated by measuring solution viscosity of a polymer at various concentration levels.
The Six.02 Bioservices name reflects Avogadro's number (6.023 x 1023), defined as the number of atoms or molecules per mole of any substance.
Vh is the hydrodynamic volume, Mw is the mol weight from LLS, [n] NA is the Avogadro's number. The Rh can be calculated from Vh and the ratio of the geometric-to-hydrodynamic radii n can be determined as follows:
here, x is the overall monomer conversion, t the time (min), [k.sub.p] is the propagation rate constant (L[mol.sup.-1] [s.sup.-1]), [M.sub.p] the monomer concentration inside the particles (mol [L.sup.-1]), n the average number of radicals per particle (-), [N.sub.p] is the total number of polymer particles ([L.sup.-1]), V the total reaction volume (L), [M.sub.T] is the total monomer to be fed (mol), and Nm is Avogadro's number ([mol.sup.-1]).
Avogadro's number is the number of atoms or molecules in one mole of a substance.
A more precise definition of Avogadro's number (the number of atoms or molecules in one mole of a substance) strengthens the definition of Planck's constant, the value that will set the size of the kilogram in the revised standard of measurement.
where C is the activity concentration in Bq/kg, [M.sub.w] is the molecular weight (g/mol), N is Avogadro's number, and [t.sub.1/2] is the half-life in seconds.
where M = [[SIGMA].sub.i][A.sub.i][n.sub.i] is the molecular weight of the sample, Ai is the atomic weight of the ith element, [n.sub.i] is the number of the formula units of a molecule, and [N.sub.A] is the Avogadro's number. Effective atomic cross section, [[sigma].sub.a], has been calculated using the following equation:
For constant pressure and almost constant temperature, T, the above expression means that volume, V, is directly proportional to the number of moles liberated, n, but note that n = N/N[alpha], where N is the number of molecules and [N.sub.[alpha]] is Avogadro's number. Both N and n are proportional to the number of bonds broken during electrolysis.
On the East Coast, students at Charlottetown's University of Prince Edward Island celebrated Mole Day--the unofficial holiday commemorating Avogadro's number (6.022 x [10.sup.23])--with a 6:02 am breakfast and a celebratory ice cream cake.
This number allows scientists to calculate a different fundamental value, the Avogadro constant (or Avogadro's number).