Avogadio’s number

To deteimine Avogadio s number from the rate of emission of ec-paxtides and the rate of production of hdium by radium. 

Atomic Mass and Molar Mass The mass of an atom, which is extremely small, is based on the carbon-12 isotope scale. An atom of the carix)n-12 isotope is assigned a mass of cactly 12 atomic mass units (amu). To work with the more convenient scale of grams, chemists use the molar mass. The molar mass of caibon-12 is exactly 12 g and contains an Avogadio s number (6.022 X 10 ) of atoms. The molar masses of other elements are also expressed in grams and contain the same number of atoms. The molar mass of a molecule is the sum of the molar masses of its constituent atoms. 

Figure 3.7 shows how to use molar mass, moles, and Avogadio s number to relate mass in grams, amount in moles, and number of atoms of an element. 

B. N. Taylor, Guide to the Use of the International System of Units (SI), NIST Special Publication 811, Gaithersburg, MD, 1995. http //www.physics.nist.gov/cuu/units/current.html. http //www.bpim.fr. The amount of substance should be expressed in units of moles, with one mole being Avogadio s constant number of designated particles or groups of particles, whether these are elections, atoms, molecules, or the number of molecules of reactants and products specified by a chemical equation. 

Such a simple empirical law as this called for a simple theoretical interpretation, and in 1811 Amedeo Avogadio (1776-1856), Professor of Physics at the University of Turin, Italy, proposed a hypothesis to explain the aw. Avogadro s hypotiiesis was that equal numbers of... 

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