Notes 11/2-11/6 CH 101
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This 7 page Class Notes was uploaded by Rani Vance on Monday November 9, 2015. The Class Notes belongs to CH 101 at University of Alabama - Tuscaloosa taught by a professor in Fall 2015. Since its upload, it has received 23 views. For similar materials see General Chemistry in Chemistry at University of Alabama - Tuscaloosa.
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Date Created: 11/09/15
Chem 101 Week of Notes 11/211/6 11/2 Chapter 7 Chapter 8 Chemical Changes and Chemical Equations Physical changes: changes that alter the state or appearance of the matter with out altering composition examples: evaporation, condensation, freezing, melting, sublimation, dissolution Chemical change: changes that alter the composition of the matter by changing the arrangement of atoms and molecules the number and type of atoms does not change Common Chemical burning something (ie propane) combine with oxygen to form water and CO2 rusting change color **involved rearrangement of atoms to form new molecules matter is not created or destroyed. Element in=element out Stoichiometry deals with quantities of chemicals in a reaction “accounting of chemistry” use chemical equations to summarize chemical reactions formula of each molecule ratio of each molecule state of each molecule (ie liquid, solid, gas) A proper chemical equation is balanced the number and type of each atom is the same on both sides of the equation Ie 2Na (s) HCl 2(g) 2NaCl (s) (s)= solid (g)=gas (l)=liquid (u)=aqueous
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