10-05-07%20-%20Lecture%203%20-%20FundE%20%26%20Chapter%201

10 05 0720 20lecture20320 20funde202620chapter201

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Unformatted text preview: Counting Atoms Chemistry is a quantitative science—we need a “counting unit.” MOLE 1 mole is the amount of substance that contains as many particles (atoms, molecules) as there are 12 in 12.0 g of 12C. in Particles in a Mole Avogadro’s Number Amadeo Avogadro 1776-1856 NA = 6.0221 x 1023/mol 6.0221 *There is Avogadro’s number of particles in a mole of any substance. CHAPTER 1 Atoms: The Quantum World Observing Atoms Spectroscopy: the analysis of the light emitted or absorbed by substances. Spectrum of Excited Hydrogen Gas Light is Electromagnetic Radiation • Electromagnetic radiation = a wave of electric and magnetic fields – ALL electromagnetic radiation travels at...
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This note was uploaded on 10/24/2009 for the course CHEM 234234234 taught by Professor Johnson during the Fall '08 term at UCSD.

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