Exam 4-2.2 - E. 6.5 5. According to the Kinetic-Molecular...

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Sample Exam 4-2 Dr. V. Williamson © Vickie M. Williamson 2007, All Rights Reserved 1. Which solid is incorrectly identified by its bonding type (ionic , molecular, network, metallic)? A. H 2 Se, molecular B. KCl,ionic C. Au, molecular D. CO 2 , molecular E. C (diamond),network 2. Determine the molecular weight of a gas if 3.5 g of gas occupy 2.1 L at STP. A. 37 g/mol B. 4.6 x 10 2 g/mol C. 44 g/mol D. 5.5 x 10 3 g/mol E. 41 g/mol 3. A 2.50 L sample of neon has a pressure of 1.59 atm at 45.0°C. What volume would the sample have if the pressure is 725 torr and the temperature 22.0°C A. 2.04 L B. 3.87 L C. 0.733 L D. 3.07 L E. 1.62 L 4. A flask contains a mixture of two gases, A and B, at a total pressure of 2.6 atm. There are 2.0 moles of gas A and 5.0 moles of gas B in the flask. What is the partial pressure (in atm) of gas A? A. 0.74 B. 1.04 C. 2.6 D. 9.1
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Unformatted text preview: E. 6.5 5. According to the Kinetic-Molecular Theory, molecules of different gases at the same temperature always have the same: A. mass B. pressure C. volume D. velocity E. average kinetic energy 6. Arrange the following gases in order of increasing average molecular speed at 25°C. He, O 2 , CO 2 , N 2 A. He, N 2 , O 2 , CO 2 B. He, O 2 , N 2 , CO 2 C. CO 2 , N 2 , O 2 , He D. CO 2 , O 2 , N 2 , He E. none of these 7. A soda can containing a small amount of water is heated until the water boils. The can will be crushed when it is immediately inverted and submerged in cool water because: A. the atmospheric pressure is less than the pressure inside. B. the atmospheric pressure is greater than the pressure inside. C. the pressure inside the can is zero. D. the atmospheric pressure plays no part in this phenomena. E. the atmospheric pressure is equal to the pressure inside the can....
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This note was uploaded on 02/18/2012 for the course CHEM 101 taught by Professor Williamson during the Fall '08 term at Texas A&M.

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