Answers edited by Kris Caceres

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• How do you write "calcium hydroxlde + phosphoric acid yield calcium phosphate + water"?
  
• How many moles are in #5.75 * 10^24# atoms of Al?
  
• How do you factor: #y= 27x^3 - 1 #?
  
• How many significant digits does 50007 have?
  
• What is the electron configuration of a Mn atom in the ground state?
  
• What are the products of #HOH + TiO_2 ->#?
  
• Question #99fb0
  
• How many significant digits does 20.0020 have?
  
• How do you write 100,000,000,000 in scientific notation?
  
• What element has symbol of Ar?
  
• How many significant digits does 80800 have?