KEY-Q3C - C101 Fall 2010 Quiz 3 Using a#2 pencil darken the...

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Unformatted text preview: ' C101 Fall 2010: Quiz 3 Using a #2 pencil, darken the balloon on the answer sheet corresponding to the best answer. P,V,/T, = P: Vz/Tz PV 2 rzRT R 2 0.0821 L ntmfimo! K 3’ elm = 760 tons CH30H: heat of fusion 23.? cal/g heat of vaporization 37.4 calfg q = mCA’l‘ Cmcthmoy = 0.609 cal/g°C L/ 71. A sample of gas trapped in a syringe has a pressure of 400florr when the volume is 250 ml... What is the {igltaple if the pressure is 5005211? Ru: 5. Pal/L V2.3— w%{t, :2 gmxifimg ®2tmmr b. 31.3mL e. 50.01nL d. 10.0 mL e. 12.5 mL ' “gaming“ 72. What is the ggiurc when a 4.0 {dole sample of N2 gas has a volume of 163.1. and the temperature is 40pm W: n m. P”; fig}_ 3 Lsfijgwsn. :2 0 {gym a. 1.22 arm b. 89.6 atm c. 10.0 ann a: 0.821 atm e. 210.13.01.51?!” 7?). Which gas has significant dipole—dipole forces acting between the molecules? ill 0 (‘45ng etc) 51;? gauze/r” he?!" o/M M Wis bale?” E a. c "‘4 b. 3’02 __- :C:O d. CH3 “H; e. 1:“5H;“""”4%;3 page». I? . H’ 74. Methanol, CH3OH, melts at —98°C. How much heat must be removed to completely-Mirmeg’éme 15.0 g of methanol that is at its meltingwpoint? Note: There is some “potential? uswe‘ful u.....~a..c.mv«wm.,.w ”MW“ Kn {4,53, May; Mfl firxtkn 14"?” “Virg- information” at the top of the page. a. 56 cal ‘ 49% a“ falmlfl- 0mm 0M "tame! wag/Jae! .E? 4. b 561 cal { tic/9 .5 c. 895 cal C/ 5‘ 0 _ . P Q : 2.32741344/6 >$ 8’ ggf“; (fa d. 34.8 keal fiat a»? x . c. 55.0 kcal 75. How many grams of ammonium carbonate are needed to make 400. mL of a 2.00%(WIV) aqueous ammonium carbonate solution? a. 0.50 g b. 2.0 g c. 4.0 g d. 5.0 g . Mflmé Elwin 76. Suppose that 0.40 moles of calcium nitrate are placed in a flask and water is added until the volume is 500 mL. What is the concentration of the resulting solution? a. 0.20M ME/M’Jéi s.- Mo/ fiajmfie. mm mm“? b. 0.40 M -' it...§azu.7lfm. c. 1.0 M O'WW/ .3 0!? ma] 63:2 m e. 1.6M {3,530.9 t... .1......
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