# Constante de avogadro

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Constante de Avogadro - Wikipedia, la enciclopedia libre

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An Exact Value for Avogadro's Number Untangling this constant from Le Gran K could provide a new definition of the gram Ronald Fox, Theodore Hill Avogadro's number, N A , is the fundamental physical constant that links the macroscopic physical world of objects that we can see and feel with the submicroscopic, invisible world of atoms. In theory, N A specifies the exact number of atoms in a palm-sized specimen of a physical element such as carbon or silicon.

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Lorenzo Romano Amedeo Carlo Avogradro, Count of Quarengna and Cerreto (1776-1856). [6.0221x10^23]

© Steve Gschmeissner/Getty ImagesPhosphate crystals magnification: When measuring microscopic objects, such as these phosphate crystals, chemists use moles, a unit of measurement that was derived using the Avogadro constant. The simplest expression of Avogadro’s number is 6.02x10^23. In the early 1980s, an article in “The Science Teacher” suggested that from 6:02 a.m. to 6:02 p.m., October 23, we should celebrate Mole Day. You do the math. Happy Mole Day!

One kilogram silicon sphere made at CSIRO for the Avogadro Project 2017, Museum of Applied Arts & Sciences, accessed 3 April 2017, <https://ma.as/539785>

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Avogadro Constant Since 1811 iPhone case