Questions asked by Mic

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• How many atoms of potassium are in 249 g of potassium sulfate?
  
• What is wrong with the Lewis structure depicted below?
  
• What is the best Lewis structure below?
  
• Which sample contains the greatest number of atoms?
  
• Using only electronegativity, which bond would have the greatest percent ionic character?
  
• What is the limiting reactant when 6.00 g of BaCl2 reacts with 5.00 g of Na3PO4 to form the precipitate Ba3(PO4)2?
  
• The decomposition of KClO3(s) into KCl(s) and O2(g) with an 85% yield. How many moles of KClO3 must be used to generate 3.50 moles of O2?
  
• What mass of solid aluminium is needed to react with excess H2SO4(aq) to produced 20.0 L of H2(g) at 1.0 atm and 298 K?