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Question 1: If a compressed air cylinder for scuba diving contains 2.0L if gas at 16C and 240.atm pressure what volume does the gas occupy at 1.0 atm and 25C?

Question 2: A sample of nitrogen gas contains 5.0 mol in a volunes if 3.5L Calculate the new volume of the container if the pressure and temperature are kept constant but the number of moles of nitrogen is changed to 6.22 mol. 

Question 3: How many liters does each of the following quantities of O2 occupy at STP (a) 7.7 mol; 9b00.87 mol. Please explain your answer and also provide examples

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