Lecture_7 stoichiometry, theoretical yield, percent yield, emperical and molecular formauls

Lecture_7 stoichiometry, theoretical yield, percent yield, emperical and molecular formauls

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Chem 1A Lecture 7
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Today’s Topics Stoichiometry Theoretical Yield Percent Yield Emperical and Molecular Formula
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Molar Mass: Calculate the molar mass a) CH 4 b) calcium phosphate
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Balancing Equations: Aluminum metal reacts with oxygen gas to produce aluminum oxide. Write the balanced reaction. Al (s) + O 2 (g) Al 2 O 3 (s) To Balance Rxn : Generally start with most complex molecule.
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Limiting Reagent Problems: 2 pieces bread + 1 piece ham 1 sandwich Have 14 pieces of bread, 8 pieces of ham How many sandwiches can you make? What is the limiting item? What do you have left over?
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Limiting Item? 2 pieces bread + 1 piece ham 1 sandwich Have 500 g bread, 200 g pieces of ham How many sandwiches can you make? What must you do first?
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Limiting Reagent: 4 Al (s) + 3 O 2 (g) 2 Al 2 O 3 (s) You have 1 mol Al and 1 mol O 2 Will reaction occur? a) Yes b) No c) Maybe
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4 Al (s) + 3 O 2 (g) 2 Al 2 O 3 (s) 1 mol Al reacts with 1 mol O 2 Which is the limiting reagent? a) Al
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This note was uploaded on 09/09/2011 for the course CHEM 1A taught by Professor Van koppen during the Spring '07 term at UCSB.

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Lecture_7 stoichiometry, theoretical yield, percent yield, emperical and molecular formauls

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