Answers edited by Truong-Son N.

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• How much energy is needed to change 1 g of ice at 0°C to water at 0°C?
  
• Which metal is more reactive from - (A) Sodium (B) Copper (C) Silver (D) Mercury. Explain how?
  
• What is the geometry and hybridization of #"H"_2"S"#? How many #sigma# and #pi# bonds does it have?
  
• An ideal gas is compressed at a constant pressure of 120 kPa to one-half of its initial volume. The work done on the gas is 790 J. What was the initial volume of the gas?
  
• How many sigma and pi bonds are generally part of a triple bond?
  
• How to tell if a central element in a molecule needs to form hybridized orbitals?
  
• How do you make aldehyde from carboxylic acid?
  
• What are the limitations of Octet Rule?
  
• Would the following molecules react by Sn1 or Sn2 mechanism: 1-methyl-1-bromo-cyclohexane and 2-bromohexane?
  
• Why can't Sp3 hybrid orbitals can form pi bonds?
  
• Which of the following has the smallest bond order for #"CO"#? #["Mn"("CO")_6]^(+)#, #"Cr"("CO")_6#, #["Ti"("CO")_6]^(2-)#, #["V"("CO")_6]^(-)#
  
• Why is the oxidation state of oxygen in nitrite not #-4#?
  
• How to draw overlapping of pure or hybridized orbitals for Br2 and NO+? Explain the need for the orbital of an atom to hybridized based on the Lewis structures
  
• How many calories of energy must be added to a 1 gram of water to increase its temperature by 1 degree?
  
• What is Ground-state and Excited state of an atom?Thanks..
  
• What happens to the equilibrium constant in a complexation reaction?
  
• He was angry but he decided to meet her. (Make it a complex sentences.)?
  
• 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?
  
• Can nitrogen ever have 2 bonds and 2 lone pairs, or even 1 bond and three lone pairs?
  
• How do pi bonds affect bond angle?
  
• What is the structure of (Z)-1-chloro-1-fluoro-1-butene?
  
• Pyridine and pyrimidine are both aromatic compounds, how many electrons does each nitrogen atom contribute to the electron cloud of each compound?
  
• How do you write an essay in third person?
  
• If you have an organic molecule, what is the hybridization of a H attached to a C with a single bond?
  
• Starting with 200 mg of cyclopentadiene, 300 mg of maleic anhydride and 375 mg of cycloadduct anhydride is obtained, what is the limiting reagent? Calculate the % yield for the anhydride.
  
• Show that if #T# is continuous and #A sube Y# is any open set in #Y#, that #T^(-1)(A)# is open?
  
• Affect v.s. effect, when would you use each of them?
  
• Is CO a lewis acid?
  
• How does a Diels Alder reaction work?
  
• How would you determine the quantum number, ml, for an element?
  
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