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A tank of compressed O2 gas is 6.0 ft high and has a diameter of 8.0 in.  The tank is filled with O2 to a pressure of 3000. psi. 

How many moles of O2 does the tank hold, and what volume would the gas occupy at 1.0 atm (15 psi) and 300. K?  (Assume that the ideal gas law holds.)  

  • If it were assumed that the van der Waals equation held instead of the ideal gas law, how many moles does the tank hold, and what volume would the gas occupy at 1.0 atm (15 psi) and 300. K?

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