# test1 - test 1 Physics 230 Prof Hadley 1 Question NOTE For...

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test # 1 Physics 230 Prof. Hadley 1. Question: NOTE : For the following problems, use these constants: Universal gas constant: R = 8.31 J/(mol K) = 0.0821 (atm L)/(mol K) Boltzmann constant: k = 1.38 X 10 -23 J/K Avogadro's number: N A = 6.02 X 10 23 molecules/mol Coulomb constant: k = 8.99 X 10 9 N m 2 /C 2 T(K) = T(C) + 273 1 atm = 1.01 X 10 5 Pa 1 amu = 1.66 X 10 -27 kg Also, pay close attention to significant figures. Problem 1: (Questions 1-11) You are given an expandable balloon initially at 30.0 L full of pressurized diatomic Oxygen ( O 2 = 32.0 amu ) at 1.00 atm of pressure and temperature of 25C. The gas in the balloon is contracted isothermally until it reaches a pressure of 3.00 atm. Question 1: How many moles of gas are there in the balloon? Your Answer: 1.2 14.6 1.23 CORRECT 15 none of the above Points Received: 1 of 1 Comments:

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2. Question: Question 2: What is the volume of the balloon after the contraction in L? Your Answer: Points Received: 1 of 1 Comments: 3. Question: What units is the universal gas constant in as used in this problem?
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