Answers edited by Truong-Son N.

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• Which of the following molecule and geometry combinations is incorrect?
  
• How do you determine if you have an electrophile or a nucleophile?
  
• The #pKa# of butyric acid #"HBut"# is 4.7. How do you calculate #K_b# for the butyrate ion #"But"^-#?
  
• Question #f2a5b
  
• How does hydrohalogenation mechanisms work?
  
• Is Benzene an alcohol?
  
• Why can single bonds rotate?
  
• In the compound, #CaNa[Fe(CN)_6]#, what ligands are in the coordination sphere?
  
• Explane entropy and enthalpy in detail?
  
• What type of reaction is #CH_3CH_3 + Cl_2 → CH_3CH_2Cl + HCl#?
  
• How do you integrate #int(x+1)/((2x-4)(x+3)(x-7))# using partial fractions?
  
• What does change of state mean?
  
• What is the connection between a question that has just been asked and the occasional note within the question that someone else asked for an answer some time ago?
  
• Why are the lone pairs in the diagram below connected with dashed lines and triangular shapes? Do they signify anything?
  
• How do you integrate #int x^2 / (x-1)^3# using partial fractions?
  
• Which is not a good nucleophile, phenoxide ion or acetate ion?
  
• Why is sn2 concerted?
  
• For a #"313 g"# sample of helium gas that cools by #41.6^@ "C"# due to being compressed by #"267 L"# at a constant external pressure of #"1 atm"#, if its molar heat capacity is #"20.8 J/mol"^@ "C"#, calculate #DeltaE#, #q#, #w#, and #DeltaH#?
  
• How can you learn f block elements?
  
• How many molecules are in 165 g of carbon dioxide?
  
• A model train, with a mass of #3 kg#, is moving on a circular track with a radius of #2 m#. If the train's rate of revolution changes from #5/3 Hz# to #3/4 Hz#, by how much will the centripetal force applied by the tracks change by?
  
• If a hose filling up a cylindrical pool with a radius of 5 ft at 28 cubic feet per minute, how fast is the depth of the pool water increasing?
  
• What torque would have to be applied to a rod with a length of #4 m# and a mass of #3 kg# to change its horizontal spin by a frequency of #2 Hz# over #3 s#?
  
• How do you write #625^(3/4)# in radical form?
  
• Why is entropy equal to #q# for a reversible process? What is the difference between reversible and irreversible?
  
• How do you find the Maclaurin Series for #sin(3x^2)#?
  
• What is the projection of #<< 3, -6, 2 >># onto #<< 3, 2, 1 >>#?
  
• Will any hybridized orbital be lower in energy than all unhybridized orbitals?
  
• Partial Pressure Problem?
  
• If the volume of the container is #"1.00 L"#, what is the change in mols of gas required to change the pressure from #"1.00 atm"# to #"0.920 atm"# if the temperature was also dropped from #25^@ "C"# to #22^@ "C"#? (#R = "0.082057 L"cdot"atm/mol"cdot"K"#)
  
• Where is potential energy seen in chemistry?
  
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