chem105-exam3-ochem (1)

chem105-exam3-ochem (1) - work them out thoroughly! It...

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Exam 3 Review Organic Chemistry
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Things to know… ¡ Alkanes: hydrocarbons with ONLY single bonds ¡ Can be a ring structure (cycloalkane) ¡ *Methane: CH4 ¡ *Ethane: C2H6 ¡ Alkenes: hydrocarbons with at least one DOUBLE  bond ¡ Ex) Ethene C2H4 ¡ Alkynes: hydrocarbons with at least one TRIPPLE  bond ¡ Acetylene C2H2
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Functional Groups ¡ Aromatic: ring structure with alternating double bonds ¡ Note: it’s different from a cycloalkane because  cylcloalkanes do NOT have double bonds ¡ Ex) Benzene C6H6 ¡ Alcohols: have an –OH group ¡ Amines: have an –NH2 group ¡ Behave like ammonia—they’re weak bases ¡ Carboxylic Acids: have a –COOH group ¡ Behave like acetic acid—they’re weak acids ¡ Carbonyl: have a double bonded –O 
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Fatty Acids and Surfactants ¡ Polar head ¡ Nonpolar hydrocarbon chain tail ¡ Cis vs trans ¡ Saturated vs unsaturated ¡ Understand what bubbles look like! 
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Practice Problems Do all of them with us and 
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Unformatted text preview: work them out thoroughly! It really makes a Pick the polar molecule (polar compound ) : a) ethane b) acetic acid c) ammonium ion d) benzene e) carbon dioxide Answer: B The molecule shown is of the ______ type and contains the 2 functional groups________ and ________: a) Alkene; amine and alcohol b) Aromatic; alkane and alcohol c) Alkyne; amine and alcohol d) Aromatic; amine and carboxylic acid e) Athene; amine and eminem f) Cycloalkane; amine and carbonyl Answer: D What is the percent yield of the combustion of 0.60 g of propanol (C3H7OH) to form carbon dioxide if the heat from the reaction is just enough to warm up 1 L of water by 2 C ? H (delta H) = -2000 kJ/ mol C3H7OH a) < 1 % b) 4.0 % c) 22 % d) 40 % e) 92 % f) There is not enough heat given off g) none of these Answer: D...
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chem105-exam3-ochem (1) - work them out thoroughly! It...

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