Answers edited by Truong-Son N.

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• Is rain water heterogeneous or homogeneous?
  
• If the density of the gas is #"4 kg/m"^3# and its pressure is #1.2 xx 10^5 "N/m"^2#, how do I calculate the root-mean-square speed?
  
• Prove that #(cosxcotx)/(1 - sinx) - 1 = cscx#?
  
• Molecular orbital theory for polyatomic molecules?
  
• What makes tetrahedral and octahedral transition metal complexes coloured?
  
• If #"12.0 g"# of benzene is mixed with #"38.0 g"# of #"CCl"_4#, what is the molality?
  
• For a certain reaction #2A + B rightleftharpoons C + 3D#, #K_(eq) = 4.2 xx 10^3#, which of the following is true?
  
• How could you figure out how many oxygens a polyatomic ion has?
  
• Why secondary carbocation more stable than primary?
  
• What is the conventional ion notation? For example, how which of the following is correct?
  
• Does the real resonance structure have a lower or higher total potential energy than each of the contributing structures?
  
• What must the temperature, pressure, and volume units be in any gas law?
  
• How do you draw the MO diagram for #"O"_2# from scratch?
  
• Why are high heats of vaporization usually associated with high boiling temperature?
  
• What is an example of an addition reaction?
  
• Why are there fractions in this chemical equation? #NH_2CH_2COOH (s) + 9/4 O_2 -> 2 CO_2 (s) + 5/2 H_2O (l) + 1/2 N_2 (g)# Thank you!?
  
• Why is it important that the pressure inside a mass spectrometer gets low as possible?
  
• What is sigma bond metathesis?
  
• How do you use VSEPR theory to draw #"C"_10"H"_5"Cl"_7#?
  
• What is an example of a Bronsted-Lowry bases practice problem?
  
• What is the name of #Ag_2O#?
  
• Question #d9771
  
• What is the molar mass of sodium hydroxide?
  
• What is the mechanism for synthesis of tetraphenylcyclopentadienone?
  
• Compare and contrast the reactivity of alpha hydrogens on carbonyl compounds and alkenes?
  
• Circle all of the allowed sets of quantum numbers for an electron in a hydrogen atom?
  
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