Answers created by Diana S.

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• Why do atoms form molecules?
  
• Is hydrolysis exothermic or endothermic?
  
• How do you balance #HBr + Mg(OH)_2 -> MgBr_2 + H_2O#?
  
• What is #(-2.5) + (-2.5)#?
  
• How does water's composition of oxygen and hydrogen create a polar molecule?
  
• A positive two ion of calcium, #Ca^(2+)# would have how many protons, electrons and neutrons?
  
• How do you find the derivative of #(x^2-2)/x#?
  
• How do you find the domain & range for #y=tan4x#?
  
• What is the cotangent of -7pi/4?