Chapter 2 1192

Chapter 2 1192 - 9/1/2011 Chapter 2 Atoms and the Atomic...

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9/1/2011 1 Chapter 2 Atoms and the Atomic Theory Law of Conservation of Mass The total mass of substances present after a chemical reaction is the same as the total mass of substances before the reaction. Or Matter is neither created nor destroyed during a chemical reaction.
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9/1/2011 2 2AgNO 3(aq) + K 2 CrO 4(aq) 2 KNO 3(aq) + Ag 2 CrO 4(s) (Practice Example B) A 7.12 g sample of magnesium is heated with 1.80 g of bromine. All the bromine is used up, and 2.07 g of magnesium bromide is the only product. What mass of magnesium remains unreacted?
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9/1/2011 3 Law of Constant Composition All samples of a compound have the same composition the same proportions by mass of the constituent elements. What is the percent composition of magnesium bromide? How many g of magnesium are in 32.0 g of magnesium bromide? Dalton’s Atomic Theory 1. Each element is composed of small particles called atoms. Atoms are neither created nor destroyed in chemical reactions. 2. All atoms of a given element are identical and differ
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This note was uploaded on 02/12/2012 for the course CHEM 1A taught by Professor Poter during the Spring '11 term at Santa Monica.

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Chapter 2 1192 - 9/1/2011 Chapter 2 Atoms and the Atomic...

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