Questions asked by Zoey

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• How many moles of hydrogen gas are contained in 21.3 L at stp?
  
• What is the molar mass of 31.3 g of gas exerting a pressure of 5.71 atm on the walls of a 3.04 L container at 297 K?
  
• A mixture contains 21.7 g NaCl, 3.74 g KCl, and 9.76 g LiCl. what is the mole fraction of NaCl?
  
• An aqueous solution contains 32.7% KCl. How many grams of KCl are contained in 100 g of this solution?
  
• What is the mole fraction of LiF in an aqueous solution that contains 39.4% LiF?(w/w%)