Answers edited by Truong-Son N.

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• What does R configuration mean?
  
• What is the difference between mass composition and percent composition?
  
• Why is a pi bond weaker than sigma bond?
  
• What is the SMART query for carboxylic acids ???
  
• Explane entropy and enthalpy in detail?
  
• How do you find the derivative of Inverse trig function #y = cos sec^2(x)#?
  
• Why are major resonance forms more stable?
  
• Determine the first-excited state of scandium?
  
• How to prepare 1-phenyl-3-methyl -2- butanol?? Thank you in advance
  
• A man stands on a crane and throws a water balloon down at at 21 m/s. He finds that it takes 2.4s for the balloon to hit the ground. What is its height one second before it hits the ground?
  
• Please let me know why it is necessary to scrupulously oven-or flame-dry the glass used in Grignard reaction? Please write the reaction.
  
• Explain what is meant by the dual nature of light?
  
• What mass is contained in #"75 cm"^3# of a substance whose density is #"620 g/cm"^3#?
  
• What do you think causes emission of light of various colors?? How do energy and wavelength relate as factors?
  
• What is the purpose of adding sufuric acid at the end of the Gringard reaction??
  
• How do you find the antiderivative of the function #y=arc cotx#?
  
• Load with a mass if 0.2kg will stretch a spring 0.1m.Spring is stretched an additional 5cm & released.Find the spring constant,period of vibration n f,max acceleration,velocity through equilibrium positions & motion equation?
  
• Write the overall reaction for reaction of methyl benzoate with excess phenyl magnesium brimide in ether, followed by H3O+. ????
  
• How to determine bond angles? Give me the answer as if I was 5 years old.
  
• What is the heat of hydrogenation in a hydrogenation reaction?
  
• Question #43909
  
• What are examples of orbital overlap for molecules consisting of second-row elements?
  
• If there is an upward force of 4 and a force to the right of 3, what is the net force?
  
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