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Quiz1A_F10_Solution - YORK UNIVERSITY NAME 3 Q g{421 QM 3...

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Unformatted text preview: YORK UNIVERSITY NAME: 3 Q g {421 QM 3 SC/CHEM 1000 3.0 Section A FW 2010 STUDENT NUMBER Quiz No. 1 September 30 2010 50 Minutes 30 Marks NOTE: ALL FINAL ANSWERS MUST BE WRITTEN IN INK R = 8.314472 JK‘lmol" ——- 0.08205 L atm K" mol" k = 1.38066 1-110'23.1K'1 Avogadro’sonumber NA 2 6.022x1023 molecules mol4 1 standard atmosphere 3 1.013 x 105 Pa = 760 torr (mm Hg) Density of mercury = 13.6 g cm'3 Acceleration due to gravity “—* 9.81 m s' 0°C = 273.15 K ATOMIC masses: hydrogen 1.008, helium 4.003, carbon 12.011, nitrogen 14.007, oxygen 15.999 fluorine 18.998, argon 39.948 g mol“. 2 MARKS [5] 1. A sample 0f2. 14 g of a gaseous organofluorine compound (one that contains only carbon and fluorine) occupies a volume of 2.00 L at 255°C and 30.2 kPa. What is the molar mass of this compound and what is its formula? W —.—-_ m V V :- n fl T" V RV '- JL’L KT 2.: 2 ' It]. {‘1 ,____.__. 2' JD -1 301:“? ,2 00 3 £1.90 092M939“ T:- f 0:281 {‘OI3KIO P7 ( H :: 97.? 1 mal 01 s V (‘7 ..--- {CT . . I I 0?’ ‘— 3 0.1)“ M W I ’ fl- / 013x105, M -0{ 0-08105-198'55 & {7- I I! 4 F 4.1 {a c??? FW 10 SC/CHEM 1000 3.0 A Page 2 Quiz N0. 1 [5] 2. Silicon oi} (density 1.30 g cm"3) is often used as the liquid in a manometer. A silicon oil manometer is operated at 254°C. One side is connected to a gas bulb, with the other side open to the atmosphere. If the level of oil in the side attached to the bulb is 6.24 cm higher than the side open to the atmosphere, what is the pressure of the gas in the bulb if atmospheric pressure is measured to be 740.5 mmHg? 3 e ‘1 ‘7 ;: :: (i?! é'l‘fX/E K130i“? % A’ 5”” " r r [4] 3. What is the total gas pressure in a 30.0 L vessel containing 0.60 g of helium and 14.0 g of nitrogen (N2) at 220°C, in mmHg? FV : n QT 17.36 2 0'60 4* “3‘0. ~0'0920f. 295/! 4.003 19'0"? ——___ 3? FW 10 SC/CHEM 1000 3.0 A Page 3 Quiz No. l {5] 4. Two chambers are connected by a valve. On chamber has a volume of 15.0 L and contains N2 gas at a pressure of 2.00 atm. The other has a volume of 1.50 L and contains 02 gas at a pressure of 3.00 atm. The valve is opened and the gases mix, what is the final pressure in the system in atm? (Parcel/64f“? /7,l/,¢-/7;Vz_ @ OKK/Ezém yang-5’0 =1 @145, (5’6, l-fz 1’ ,-—_~. 0°Z?Z%a/rh mom/m Me’s [fit/l4?“ fi'dx/f'é :— PZH/ésfi \I/ P: /'c9/84/7vx 0,0 meé/I‘ I: gz+ FNL (9: 7 ....—. 0.29.2}f'f'g’6: ———- : 02-63% [4] 6. Calculate the root mean square speed (urms) of gas phase water (1-120) molecules at 200°C. What is the ratio of this speed to that of Helium atoms at the same temperature? .. 3&1- ___ 3&9.]H€>¢ 7.?ng £67410 arms " U 71”. .F J [gowns/N3 _; 537 m5”! FW 10 SC/CHEM 1000 3.0 A Page 4 Quiz No. I [7] 5. The lUNBALANCED equation for the production of acrylnitrile (C3H3N(g), NIB/1:53.064 g moi' ) is C3H5(g) + NH3(g) +?02(g) —> C31-13N(g)+ H20(g,1) / Balance the equation. 2 What mass of acrylnitrile is produced when the following pressures of reagent gases are reacted in a ISOL reactor at 25 °C? 03mg) 800 kPa NH3(g) 500 kPa 02(g) 1500 kPa ’5 ____ f , . W é’géifig? . /5'0 _—/1.0 0874 298/5” 0: xx 0 n23025’wmé W ,1 ‘H : 3&‘2éffl53'flééz :./60R: THE END ...
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