Questions asked by Sarah W.

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• What is the ionic equation for Na2CO3 + Ba(NO3)2 -> BaCO3 + 2NaNO3?
  
• How could gas-density measurements help to establish that PCl5 vapor is decomposing?
  
• What volume of 6.0 M HCl is required to exactly react with 0.040g Mg?
  
• A 10.0 L flask contains 1.031 g O2 and 0.572 g CO2 at 18C. What are the partial pressures of oxygen and carbon dioxide?
  
• Which of the following solutes is most effective in lowering the freezing point of water?