Answers edited by Loveta Love

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• What is the difference between mass number and atomic number?
  
• Question #69d39
  
• Is evaporation a chemical or physical change?
  
• What would be the product when 2-methyl-2-propyloxirane with CH3MgBr??
  
• Question #bb94d
  
• What are molecular compounds usually composed of?
  
• Question #d4e7e
  
• What VSEPR shape is #H_2O#?