De Anza CHEM 1B - Exam (7 pages)

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7
School:
De Anza College
Course:
Chem 1b - General Chemistry
General Chemistry Documents

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Exam Name MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question 1 How much faster does 235 UF6 effuse than 238 UF6 1 A 1 009 times as fast B 1 013 times as fast C 1 004 times as fast D 1 018 times as fast E 1 006 times as fast 2 The van der Waals equation for real gases recognizes that A the non zero volumes of gas particles effectively decrease the amount of empty space between them B molar volumes of gases of different types are different C gas particles have non zero volumes and interact with each other D the molecular attractions between particles of gas decreases the pressure exerted by the gas E all of the above statements are true 2 3 At STP the ratio of the root mean square speed of CO2 to that of SO2 is 3 A 1 207 B 1 456 C 2 001 D 1 000 E 2 119 4 Of the following is a valid statement of Charles law A PV constant B V constant n C V constant P V D constant T E 4 P constant T 5 Of the following gases has density of 2 104 g L at 303 K and 1 31 atm A He B Xe C Kr D Ne 5 E Ar 6 Which of the following is not part of the kinetic molecular theory A Atoms are neither created nor destroyed by ordinary chemical reactions B Attractive and repulsive forces between gas molecules are negligible C Collisions between gas molecules do not result in the loss of energy D The volume occupied by all of the gas molecules in a container is negligible compared to the volume of the container E Gases consist of molecules in continuous random motion 1 6 7 Of the following is a correct statement of Boyle s law P A constant V B V constant P C V constant T D n constant P 7 E PV constant 8 The density of air at STP is 1 285 g L Which of the following cannot be used to fill a balloon that will float in air at STP A CH4 B HF C NH3 D NO E Ne 8 9 The volume of a sample of gas 2 49 g was 752 mL at 1 98 atm and 62 C The gas is A Ne B SO3 C NO2 D SO2 E NH3 9 10 Of the following only is impossible for an ideal gas T2 V A V2 T1 1 B V1 V2 T1 T2 C V1 T1



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