Answers edited by Truong-Son N.

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• Why do pi bonds restrict rotation?
  
• Question #8f16a
  
• How do you find a power series representation for # (1+x)/((1-x)^2)#?
  
• What is a possible set of four quantum numbers (n,l,ml,ms) in order, for the highest energy electron in gallium?
  
• How do you balance this reaction? #"K"_2"Cr"_2"O"_7(aq) + "H"_2"SO"_4(aq) + "H"_2"S"(aq) -> "Cr"_2("SO"_4)_3(aq) + "H"_2"O"(l) + "S"(s) + "K"_2"SO"_4(aq)#
  
• Can nonpolar molecules have polar bonds?
  
• How do you find pOH if [H+] is given?
  
• How do you use the first and second derivatives to sketch #y = (x+2)(25 -x^2)#?
  
• How do you integrate #x^2/sqrt(9-x^2) dx#?
  
• What are some examples of theoretical chemistry?
  
• Are #N_2# and #N_2^+# paramagnetic or diamagnetic? Which one has the stronger bond?
  
• How do you find a power series representation for #f(x)=1/(1+x)^3#?
  
• In the reaction of 2-methylcyclopentadiene in #"HBr"#, which product is formed? (Hint: it should be the 1,4-addition product.)
  
• How do you solve for v in #s=vt#?
  
• How do you name benzene derivatives?
  
• Why isn't #"Be"^-#s electron configuration #1s^2 2s^3#?
  
• How do you find the Limit of #(x^2)/(lnx)# as x approaches infinity?
  
• Given the following information, should we expect to be able to assign the C-O bonds to individual peaks, and if so, which mode is associated with which band? Why?
  
• What is the measurement 111.009 mm rounded off to four significant digits?
  
• What is the derivative of #arctan sqrt [ (1-x)/(1+x)]#?
  
• If #1000000# silver atoms weigh #1.79 xx 10^(-16) "g"#, what is the atomic mass of silver?
  
• What were Rutherford's primary observations in his gold foil experiment, and how did he explain them? Describe how he modeled the atom.
  
• What is the reduction half-reaction for the unbalanced redox equation #Cr_2O_7^(2-) + NH_4^+ -> Cr_2O_3 + N_2#?
  
• How do you simplify # (1+1/x)/(1/x)#?
  
• The tetrahedron enclosed by the coordinates planes and the plane 2x+y+z=4, how do you find the volume?
  
• What is the rms speed of He atoms at 295 K?
  
• What is going on with the alkyl migration step in the Schmidt reaction mechanism on a ketone?
  
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