{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chem105a-Midterm 2-Key

Chem105a-Midterm 2-Key - Initials Chemistry 105 A PLEASE...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Initials: Chemistry 105 A PLEASE PRINT YOUR NAME IN BLOCK LETTERS Exam 2 First Letter of Name: 03/01 H l Last Name Circle Lab TA: Abbey Dana Dave Mac Maxim Dr. Bertolini Melissa Viktor Yu Hsuan Circle Lab time: W1 W4 ‘l‘h9 'i‘hi Th4 Fl Instructions: 1. You must show work to receive credit. 9 Mia-DJ 9. There are ll problems on 9 pages. Please count them before you begin. A periodic table and some useful equations can be found on the last page. . Please write your solutions in the space provided (not on the back of a page). . You MUST use black or blue ink. (No whiteout, no erasable ink? no pencil.) . Your exam will be scanned. Write your initials in the top right—hand corner of each page. Points will be deducted if not done. You MUST submit all pages to the proctors, including the periodic table page. . Only a Casio FXa26O calculator may be used on Chem lOSa exams. . Turn off cell phones and other electronic communication devices and put them away, out of sight. They may not be taken out of your bag during the exam. . When time is called, stop working on your exam immediately, turn the exam over and pass it to the aisle. Good luckl! :2) Please Sign Below: I certify that l have observed all the rules of Academic Integrity while taking this examination. Signature: Last 4 Digits ofUSC ID: Question Points Score Grader 1 6 2 6 3 5 4 8 5 10 6 6 7 9 8 10 9 10 10 l 8 l 1 12 page initials Total 100 Initials: .(6 pt) Write the balanced equation for the reaction of silver metal with bromine using the subscripts (g), (I) (s) and (aq) as necessary. 2 AggifS/J t [3}; (f) ea flea/Y5? (5} 2. (6 pt) Circle the compounds that are soluble in water. i V13 r {\Cd(C2H302)2 W82 \«1 /’ /‘““””’°"<‘\ J ,K N / N’bCls IH(OH)3 5/ 50(N03)3 \ ,, / “x rrrrrrrrrrrr ,7 // 3. (5 pt) List the molecular fonnulas of 5 strong acids. i) H U alas: ii) ii 3*” H (3)101; I. H102; 111) H I iv) HZ 804 4. (8 pt) A certain gas effuses exactly half as fast as xenon. What is the molar mass of this gas? ,1» g V; M MKc ‘1 EM” v MMX MM 3’ 52512, 3/54/10; Initials: 5. (10 pt) At what temperature do fluorine molecules; have the same root mean square velocity as radon at 315 K? \ We”? 11 i W .39 E M M F; \j M M Rh Ta 3 3 (5 K 3% 00 3/7“?“ 222/ 3/firggé (5/3: ‘5} K g \ 6. (6 pt) What two assumptions do chemieiemakeivhen they use the ideal gas law that they do not when using the van der Waals equation? I, Cms pawhet’es have no vm’wwe, 1. EMS parhe/es 0/53 n04 {nierem‘ M7524 ea oh 6} H) art Initials: 7. (9 pt) An aqueous solution contained strontium nitrate, nickel (ll) nitrate, lead (ll) nitrate and lithium nitrate. After an excess of solid sodium chloride was added, a solid precipitated and was removed by filtration. To the filtrate was then added an excess of ammonium sulfide. Another solid precipitated and was removed by filtration. To the filtrate was then added an excess of potassium sulfate, and another solid precipitated. What were the tln‘ee precipitates? List them below in the order they precipitated, (i) being the first and (iii) being the last: i) Pb Clz» ii) Ni 8 iii) Sr SOL; 8. (10 pt) What mass of KCl03 is needed to collect 1.8 L of oxygen over water at 22°C and 1 atm according to the reaction given below? The vapor pressure of water at 22°C is 19.8 torr. 2 KClO3(S) -——> 2 KCI (s) + 302 (g) Pol: 7690 am» , as raw : Magi aw = 03M 0.4m m ,3, pt: : ( 0. W4 aim ) girl .2 0. 0:2 24 W/ 02: RT [(9:03‘520Q3 535b,? g/Z?3+22\i \ K - moi \ ocwa’meé (:3 am k0“? £22.55 W Mew-«a : 5 ' a t W 2 lmogkCle Kama Initials: i G 9. (2’ pt) A 1.00 L flask with 1.00 g of hydrogen gas is connected to a 2.00 L vessel with 88.0 g C02. Both gases are at 27.0 °C. After the gases mix, what are the partial pressures and total pressures in atm‘? WHZ: 5%Hzimgé ,,,,,,, H2 : O»L599%H2 2 0 WM 0%? (380%, 002 imaggggw : 2:00 W: (:02 #5405? V54: OLMH’: 059% 35/40: “2:ng »» 080% 2/ 24% 2 24% 01.... L» + \ {95mm1 : (ZWQWNO ogzaeK a (3006” 205mm (Loo + 2500 L5 PH “2(5)! 9?: 5.(209a5m5” [5.56c5m pw M030 (206am5 05.15 555m Initials: 10. (18 pt) When 157 mL of a 1.40 M solution of an aqueous selution of gold (III) chloride was added to 253 mL of a 2.10 M NaOH solution, an off—white solid immediately precipitated. After the reaction, what was the final concentration of [A1134], [N5], [01f] and [CF]? 4% 0,13%) + mama?) ~—-; ' fluwfigé (is) + (Ema/(a7) 0{5;, L W3 :; 0’220 VVED/ AMCIB / z, azsaL 240W! yéazrf :: 053/ W; IMOH (1:, 0.220 mm” flue/3 -> 0.220 W; Adam} 0.53; mi MM W, 3., 0H? ”20/ Map/)3 3M0; NaflH 000 N61 QF/ [3 L72 [OHik O Ctr]:3(0zahm0 ; «9/»? (0/5; + £12513 1,) Dkfl:05&mw ”IaoM .r (0457+ 0.253 L) [My]: 0220 m 0.51:; r: 0405 M (0/9; + 02915 L) Initials: i .31» 1 1. M pt) A moveable piston contained 4 mol of gaseous sulfur trioxide at STP. The sulfur dioxide was completely decomposed under constant pressure and temperature according to the reaction below. The reaction released 12.8 k} of heat. What was the change in internal energy inside the piston? 2 803 (g) ‘9 2 802 (g) + 02 (g) W W lit/soot {r2 moi Initials: Submit this page with your exam. All answers should be in the space provided with each question. I VIII 7 77777 i """"""" ‘— 77c" """" I; 15308 11 111 IV V VI VII 1 ....... 3mm... ,_1.,_,2._Mji , 1% Li 1 Be 6.94! 1 9012’ 11 1 12 Na i Mg 2299 24.31 1 775 20 IIII 27 ‘ 22 23 I 24 25 26 27 28 "727' 30 31 K Ca Sc T1 v Cr Mn Fe Co I Ni Cu Zn Ga . . . . 5 i 63 55 65 38 69 72 Ru Rh 1 Pd Ag Cd I n 04 ”'45—- £7467 41'4"; ‘‘‘‘‘ 2: EWTM'Enm "7; ////// 85.47 87.62 I 88.9] i9!.22 929] 95.94 (99} 2011] 102.9 1 10614 55 56 ' S7 72 73 74 75 76 77 f 78 Cs Ba La Hf Ta W Re Os 11' Pt ,71322WWEL3L" 138" HES-L 4w...-..1_822:, JE‘EZ ..... T1202 __192M2,2 T9509 Fr Ra Ac Rf Db Sg 8!; HS Mt I (223) 226.0 2270 (261) (262) (263) (262) LQGS) (263)j I 59 60 6] ””””””””””””””””” 66' m T’I—TMQM” 69 1 70 W71’; ‘ Lanthamdes Pr Nd Pm Sm Dy Ho Er Tm I Yb Lu I I am“ ,,,,,,,,,, ”01, 13333., ,w [5.94 1:3?I ,Jéélé~, If ”1‘12““.J,§£‘Z,WI._E2;§.,._ uwmfifliflm ,flii ,,,,,,,, I i ''''''' 7 ”E W 92 93 m ’1 ' 7 98 99 I 100 101 T 102 103 I 1 Actinides Pa U Np Pu Cf Es Fm Md ; N0 1 L,“IMAHNIIWW"MM”,Mm-..” £3129" .£3§:9M,,I,3179m.£[email protected],L.fl§m) ........ IQ :1?l_-fi.i_ $2le ,iljézwIWQflIfl IQ§§L.L(259) I 3 3RT rate KEN z-RT 12m. =.— W ‘ = 2 MM rate2 2 nRT n :1: * * PO,” —— ~a — R 2 0.08206 L aim/K 11101: 8.3145 J/K 11101 nb V dRT PV 3 nRT MM 2—- P AE 3 q + w w =— -PAV 1 atm == 760 torr z 760 mm Hg lL-atm = 101.31 ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern