101-02-slides-2 - Ozone Hole Atmospheric History 600 XCFC...

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Ozone Hole
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Atmospheric History 0 100 200 300 400 500 600 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 Year X CFC Dry Air (ppt) CFC-11 Nothern Hemisphere CFC-11 Southern Hemisphere CFC-12 Northern Hemisphere CFC-12 Southern Hemisphere © Colon, 2005
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Scientific Process 2003 W. W. Norton & Company Inc.
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Which of the following must be the same before and after a chemical reaction? (choose all that are correct) 0 of 5 1 2 3 4 0 0 0 0 1. The sum of the masses of all substances involved. 2. The number of molecules of all substances involved. 3. The number of atoms of each type involved. 4. The number of moles of all substances involved. 2011 D.B. King
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Dalton’s Atomic Theory : Conservation of Mass and Definite Proportions … six fluorine atoms and four hydrogen atoms after reaction. Mass is conserved. Six fluorine atoms and four hydrogen atoms before reaction … HF always has one H atom and one F atom; always has the same proportions (1:19) by mass.
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1. How many grams of Cu are there in
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This note was uploaded on 01/15/2012 for the course CHEMISTRY 101 taught by Professor King during the Spring '11 term at Drexel.

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101-02-slides-2 - Ozone Hole Atmospheric History 600 XCFC...

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