ch_1-10_review

ch_1-10_review - Exam Name MULTIPLE CHOICE Choose the one...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Molecular compounds of low molecular weight tend to be gases at room temperature. Which of the following is most likely not a gas at room temperature? A) CH 4 B) HCl C) LiCl D) H 2 E) Cl 2 1) 2) Standard temperature and pressure (STP), in the context of gases, refers to __________. A) 273 K and 1 pascal B) 273 K and 1 atm C) 298 K and 1 atm D) 273 K and 1 torr E) 298 K and 1 torr 2) 3) The volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62 °C. The gas is __________. A) NO 2 B) SO 2 C) Ne D) SO 3 E) NH 3 3) 4) A sample of an unknown volatile liquid was injected into a Dumas flask (m flask = 27.0928 g, V flask = 0.1040 L) and heated until no visible traces of the liquid could be found. The flask and its contents were then rapidly cooled and reweighed (m flask + vapor = 27.4593 g). The atmospheric pressure and temperature during the experiment were 0.976 atm and 18.0 °C, respectively. The unknown volatile liquid was __________. A) C 7 H 14 B) C 6 H 12 C) C 6 H 6 D) C 6 H 14 E) C 7 H 16 4) 5) The kinetic - molecular theory predicts that pressure rises as the temperature of a gas increases because __________. A) the gas molecules collide more energetically with the wall B) the average kinetic energy of the gas molecules decreases C) the gas molecules collide more frequently with the wall D) the gas molecules collide less frequently with the wall E) both the gas molecules collide more frequently with the wall and the gas molecules collide more energetically with the wall 5) 6) Of the following gases, __________ will have the greatest rate of effusion at a given temperature. A) HBr B) CH 4 C) HCl D) NH 3 E) Ar 6) 1
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7) At 333 K, which of the pairs of gases below would have the most nearly identical rates of effusion? A) N 2 and O 2 B) NO 2 and N 2 O 4 C) CO and N 2 D) N 2 O and NO 2 E) CO and CO 2 7) 8) Arrange the following gases in order of increasing average molecular speed at 25 °C. He, O 2 , CO 2 , N 2 A) He < O 2 < N 2 < CO 2 B) CO 2 < N 2 < O 2 < He C) CO 2 < He < N 2 < O 2 D) He < N 2 < O 2 < CO 2 E) CO 2 < O 2 < N 2 < He 8) 9) Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn (s) + H 2 SO 4 (aq) ± ZnSO 4 (aq) + H 2 (g) In an experiment, 225 mL of wet H
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ch_1-10_review - Exam Name MULTIPLE CHOICE Choose the one...

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