Answers edited by Jake A.

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• How do you solve using completing the square method #x^2 + 2x-7=0#?
  
• Why do alkenes have geometric isomers and while alkanes and alkynes do not?
  
• Question #edc86
  
• Question #ed026
  
• How do you solve # 7(-3y + 2) = 8(3y - 2) #?
  
• Question #272d2
  
• What is the mass of a sample of ice that requires 850.0 joules to completely melt at 0 degrees Celsius?
  
• In the synthesis of aspirin: Why the the reagents have to be dry?