key-q1ab - Quiz Number 1 Chemistry 122, Dr. Mathews Monday,...

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Unformatted text preview: Quiz Number 1 Chemistry 122, Dr. Mathews Monday, Jan 8, 2007 Name Carmen StudentlD: Lab Instructor: 1. (3 pts) A gas vessel is attached to an open—end manometer containing a nonvolatile liquid of density 0.791 g/mL as shown at the right. The difference in heights of the liquid in the two sides of the manometer is 43.4 cm when the atmospheric pressure is 755 mmHg. Given that the density of mercury is 13.6 g/mL, what is the pressure of gas in the vessel? ,' ’ \ g’fx‘infpviififi'v‘. , , V” \1\ v W 31,: mi; "- :3” 075 I Z mmfif 2. (2 pts) A sample of gas (24.2 g) initially at 4.00 atm was compressed from 8.00 L to 2.00 L at constant temperature. After the compression, the gas pressure was atm. '- / /// “" ” "5:17; 17/7” 27/2 . /.<2.m’— / w a“ g . .m ’, '~ K 1 pl :1 t“; ,7; 4452.713???“ ,ng ( / ' ’3! a V 7‘ '“ v 570% 3. (2 pts) What is the volume of 0.65 mol of an ideal gas at 365 torr and 971°C? 771/:a 737” y: mafia/yfipegz/ if?) V; m 757’ flab/Mg; M) / 4. (1 pts) The reaction of 50 mL of N2 gas with 150 mL of H2 gas to form ammonia via the reaction N2 (g) + 3 H2 (g) -> 2 NH3 (g) will produce how many mL of ammonia if pressure and temperature are kept constant? I »- x K «r - M! I: * W/ 3 @OML/l/z >//‘jmp/.«4L ,2 53m 1,. #9,” , '. a?” wa’ffiflfl'” 5’ 1’13? "*3" 1/ /K I, I A 3 7’7"; ,2}; « (mm/Llama mm L M72) 5. (2 pts) A vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon, and helium were 44.0, 486, and 218 torr, respectively. What is the partial pressure of neon in the vessel? ~ , : (PF 77%? 4%!) 79/7 6W5 * / .. \ 7%: 45/; 74W flag: 73779,.r, :: ,1 g; 2}ch if r 7é7 f. V I, y .1.» a??? 85:99‘ f? Recall that 1 atm=760 mmHg=760 torr = 101.325 kPa and that R = 0.0821 L—atm/mol—K Quiz Number 1 Chemistry 122, Dr. Mathews Wed., Jan 10, 2007 Name Carmen StudentID: _ Lab Instructor: 1. (2 pts) The compound l-iododecane is a nonvolatile liquid with a density of 1.20 g/mL. The density of mercury is 13.5 g/mL. What would be the height of a barometer column based on 1—iododecane, when the atmospheric pressure is 752 torr? ' 4 at ) . m; .. @437 my; 7975*?” (772%)» WWW} “F! 34.40 mm m 8H‘M 2. (2 pts) A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr. The balloon must be cooled to °C to reduce its volume to 3.78 L (at constant pressure). /-. / I L a LL22 7;: Macaw) 53775—5} 273% T7, 2 , y of C e 3. (2 pts) th is the amount of gas, in mol, that occupies 60.82 L at 31 °C and 367 mmHg ? V (pt/3 n 27’ n :(367mm ' 60’ 31L) 740 m M»: _— I I/ » x270 n a fi / L’M/ 8%le mm) W * 3% ’ 4. (1 pts) What volume (L) of NH3 gas at STP is produced by the complete reaction of 0.5 mol of H20 according to the following reaction? Mg3N2<s) + 6H20 (1) ——> 3Mg<0H)2(aq) + 2NH3 (g) M WWW/mfg) : 0. gamma . a)? ' Z ‘ 0.333417% (W 7;; 5. (3 pts) A gas mixture of Ne and Ar has a total pressure of 4.00 atm and contains 16.0 mol of gas. If the partial pressure of Ne is 2.75 atm, how many moles of Ar are in the mixture? ma: 2.7557947 XNa ” W " 0,é8§‘: jig-é l’, nflgféjéggX/éflw)> “ $4,400 at)?” " Vir- Vflr; '7 * V W fl’qf; Myrna Recall that 1 atm:760 mmHg=760 torr = 101.325 kPa and that R = 0.0821 L—atm/mol-K ...
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key-q1ab - Quiz Number 1 Chemistry 122, Dr. Mathews Monday,...

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