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KIN212 Brian Arwari Exercise and Sports Psychology
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Date Created: 10/26/14
1 CHM 111 Exam 3 Fall 2006 Dr Thomas Berg Namoo Total Poiots 150 Questions 1 29 517 points each USEFUL INFORMATION N0 0022 x 10 mlquot R 3314 J mar Kquot R 008206 L atm moi lH39 Kquot Jkgml 3392 1 PV nRT I mo 224 L at STP l What is the final concentration of chloride ion formed by mi ting 160 mL of 0130 M HC and 120 mL ofD6U0 M HCl39 Assume additive volumes a O423M 39 r L u m39L b D36SM P 33 c 0511M Pi Ta d 0331M e None of these is correct 2 On a certain day the barometer in a laboratory indicates that the atmospheric pressure is 164 Torr A sample of gas is placed in a ask attached to an open end mercury manometer The level of mercury in the openend arm on the manometer has a height of 1364 mm and the mercury in the arm that is in contact with the gas has a height of 1038 mm What is the pressure of the gas in atmospheres P 3 gm Ur Ll rm J a 09633atm 75 5 g b 1049 atm 39i39 3939 gt c 1143atm d 1136atm e hlone of these is correct 3 What is the atmospheric pressure in atm if the value is 27quot Torr a 0515 atm b 0434 atm c 0337 atm d 0357 atm e None of these is correct 4 A gas of unknown molecular mass was allowed to effuse t1139eLIgl1 a small opening under ednstant pressure conditions 1 required 105 5 for 100 L of the gastte effuse Under identical e5perin1entaI conditions it required 3 0 5 for 100 L of 0 gas te effuse What is the molar mass of the unklmwn gas a 154g rnel P TIM requot39 Z7002 l 237gfn1el quotEu P 6 9 P 4 e 41 g I me T I 3 M g HI 3 5 cl 3l1g 1nel 37 5 F I W 31 3 1 e None of these 15 correct H Jt r 5 How many of the fellcrwing are redex reactions 00 N 0 D 3 0 r 1 3 F5 Oalzraqa 2 Alta quot 3 Feta 2 AlNO32ml quotE I 1 3 IL L 3 pb P305 P zu HCO4 q FEClO43q 3 H30 12 L I 1L 4 L 3 3 0 weL a1w meg 2 cog gt 2 Fe cng f 0 v 35 quot 13 139 a 0 l ff 395 391 b 1 3 p P pUq 0 39 ma dl 1 I D J5 239 F J J 2 a 1 L e 4 X 6 How many mL ef039S00 M HCIWI are needed te1eaetem39nplereiy with 0100 nml def PbNO31q forming a precipitate of PhC35 WI L J r 4 1quot l in 392 1 39 quotgr a 100 mL Ml J l quotquotquot 39quot b 200n1L l39j139T39 I J e 300rnL 39 d 400 mL 7 The graph below shows the distribution of molecular speeds of argon and helium at the same temperature Helettve number of molecules 1 P 39rtr Molecular speed Which of the following is a correct match I Which curve best represents the behavior of argon Curve 1 quotJ II Which curve represents the gas that effuses more slowl Ti Curve 1 III Which curve moreelosely represents the behavior of uorine gas Curve 1 aI only b H n 3 e la I only cl I and III only e 1 11 II 8 Which of the following statements best explains why nitrogen gas at STP is less dense than Xe gas STP a r Because Xe is a noble gas there is less tendency for the Xe atoms to repel one another so they pack more densely in the gas state Xe atoms have a higher mass than N molecules Because both gases at STP have the same number of molecules per unit volume the Xe gas must be denser 1 The Xe atoms atoms are larger than N molecules and thus take up a larger fraction of the space occupies by the gas Because the Xe atoms are much more massive than the N molecules they move more slowly and thus exert less upward force on the gas container and make the gas appear denser FL L Because nitrogen is a diatomic molecule only haltquot as many molecules occupy the same volume at STP as Xe 10 ll a 432 x 102 rots A sarnple of an iron ore is dissolved in acid and the iron is coiwerted to Fe The sample is then titrated with 4T2039111L of 002240 M M1104 solution The redos reaction that occurs during titration as follows Mnosnraqi 5 F32tan 3 HtHql Mn2m 5 FEaq I4 H30 If the sample has a mass o what is the percentage of iron in the sample a 6642 b 6642 c 332 1 cl 27l 6 e None of these D correct 639 Tennis balls are usually lled with air or nitrogen gas to a pressure above atmospheric pressure to increase their bounce If a particular tennis ball has a volume of 144 cm and contains 033 g ofnitrogen gas what is the pressure inside the ball at 2403squotC39 Ta 2 r p V 3939 E k I11 II 1 E 1quot S a 40 atm s 3239 I 1 I 3 339 quot a n39 3939i uquot1J p 2 T 3 391 fl C atm 393 quot1quotquot 139L 5 3952 ci 56 atm Fquot I p None of these is correct W hat is rrns speed of helium in the summer 30 C b 113xl03ms I c t3jx1o3mrs ct 43mfs e None of these is correct 1 The gas pressure in an aerosol ean is 15 atm at 25 C Assuming that the gas inside obeys the idealgas equation what would be the pressure be if the can were heated to 450 C a 63 atm b 27 atm C 36 atm d 2 atm e None of these is eorreet 394quot K 331 13 What is the molarity of a solution made by dissolving 234 g of sodium sulfate NauS04 in enough vvater to form 125 mL of solution 0 a 104M b 0U206tvI e ooo1s2 M lg1 13 M e 34 M i l4 An inflated balloon has a volume of 600 L at sea level 100 atm and is allowed to ascend in altitude until the pressure is 0450 atrn During aseent the temperature of the gas falls from 22 C to 21 C What is the volume of the balloon at its final altitude a 316L b 114L e 131 d 2311 e None of these is eorreet 3 II 39T quot3quot U1 P p asquot 39 ir39lr 39 E 39quot H 2ii tr7quot3939 Bart 1 Ex quotor 39 39Z s 13 Pure acetic acid C3H3O known as glacial acetic acid is a liquid witha density of 1049 gf1nL at 25 C What is the rnolaritg39 ofa solution of acetic acid made by dissolving 2000 1111 ofglaciai acetic acid at 25 C in enough water to make 2500 nil of solution 1 Ll01 147 i iii u 7 339 142M 8 Ti 39quotiI39 b 161 M M I V X I 1 C 136M d 124M 0 q 2 e None oftheseisco1rect 16 How many grains ofphosphine PH3 can form when 3715 g of phosphorus and 330 L of hydrogen gas react at STP Psm Hgg 1 131I3g unbalanced 3 0 P ari39quot4 I v 4 3 quot g 5 1quotiquot w 1 103g m l3939l 39 c 840g d 39210g eiNone of theses is correct 1 Which of the following formulas oxidation number f0139Ilquot1E element is tLt a correct matchquot Pm g a Mn in MnO139 r b Br inHBrO 1 J c As1nAs4 0 1 C111 Cgndrql 4 e Oiquot1K103 1 21 Ammoniuni nitrite NH4N39O3 decomposes upon heating to lionu N gas NHrNOg5 Nag r2ii2O unbalanced When a sample of NH4NO1 is decomposed in a test tube 51 1 mi of N2 gas is collected over water at 26 C and T45 Torr total pressure How many grams of NILtNO were decomposed The vapor pressure ofwate139 is 25 Torr at 26 C a 13 g it 126 g c 135 g d 121 g e None of these is correct 22 If 45 ml of 0500 M H2304 is required to neutralize a 200 mL sample of NaOII solution what is the molarity of the NaOH solution 37 a 057tM mt It M is b 114M 2 39 c 173M E1tr cl283M 7 e None of these is correct 23 How many mL of 0755 M NEigSO1 solution are needed to provide 0565 g ofthis salt quot I Z M J 0Y pig 9 H 1 s 52n1L 0 0 l as bl 606 1nL ls F c 91 mL I In d l1391nL e None of these is correct I 24 The safety air bags in automobiles are in ated by nitrogen gas generated by the rapid decomposition of sodium azide NaN3 ZN N3rsr quot ZNE139tsi 7gtNg unbala need If an air bag has a volume of 360L and is to be lled wi39th nitrogen gas at a pressure of 115 atm at a temperature of 260 C how many grams of NaN must be decomposed Jriquot 39to U 39 as 12 E1 I10 g P H J 0k II 5 by b 164 E Lo I l FI lW 59 t 39 3 r iir39l C g k 39 pfl 51 r I 39 19 34 Cl 731 g e None of these is eorreet 25 Which will contain the nu1nber of moles of potassium ion 3 50 395 2 a 300 ml of01S M KCrO4 aw rvrIH4 3935 k039i5 7C 7 7 b 250 mt of008 M lltPO m1i r5r l7l C 5001nLof0l0MKCf FILE C1 lTlL Of M KQCO3 quotJ x Lr e gt 500 mL of 0 10 M K01I 26 If ametal eylinder with piston holds 500 L of 0 gas at 135 atm and 21 C what volume will the gas oeeupy if the temperature is maintained at 21 C while the pressure is reduced to 100 atm U r gr J I quotE quot1 a 20L L 1 L 7 W aquot 39 Iquot b quot39 l E I V e 925L I If 39 q d l3919L J V t39 l39r e None of these is correct I r E 0 27 A large natural gas storage tank is arranged so that the pressur is rnaintainecl at 220 atm On a oold day in December when the teinperature is 15 C the volurne of gas in the tank is 28500 it What is the voluine ofthe same quantity ofgas on a warm July day when the temperature is 31 C 39 a s7ox10 ft 3 V p gtlt b 242 X 10quot a3 quot V s Fa 1 2 e 539 x104 a3 a 3361 10 a3 e None of these is eorreet 28 W ill a precipitation oeeur when the following solutions are mixed I N gCO3Hq l AgNO33q NR E quotJ lquot 3 3 111 FevE3O4m Pbnxtosyzm 2 8 T t 39r quot 39rI a loltljg b 111 only e l 39ll39lClllDIll39 cl i1 and III only e 111 and Ill 29 Write the net ionic reaction for the following neutralization reaction aqueous aeetie acid is neutralized by aqueous potassium l11u39dreoltiale 3 HC2Hs02my KOHaq H20 CgHO3lltq bl HCEH30139Ilti39 quotlquot OHhtmu quot HZOH1 quot39 C2H3O2t1t o HC1H3O q KW OH gt H30 K m cg3302W Cl Htaco OH tat H0m quotquot i 36ass 39 l fe39 39 e None of these is oorreet 5 i 1 quot zl41 1 ea39 We ELL QJ1Haj ll J 3 E I I i4 DkT tf5h391t4 aw ze 2al V D 39 M63 r Z GabO mac 3 5oQoJ m l 10llO 0 gtG39Uf391J 3900 720 Dl 0L oo i19rm csoltoI5 v pl M HQ o2Fo A T 3933 IV 8 p lt1 h391 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47 gt 1 I V 3 Q 5 f3 75 3039K pY was v ra2ssaoa lt 2a39amp2lt e 35 3 I 5 51 0quotvC03c2 246603 gt 4310 1 MquotquotUquot5ltv39 Zr JQU03m UE cta 39 gt W4 5 P p S 3 W03 1 54 gt W 331130 39 m quots 30 alto2J 3H Oquot W wO3lt 3A5U05 1 5 2 km J0icA7 7 zoo 9592 4 F AE4p1tE1 coo It Flto1 J FC 3quot u 0 Fco an Fcoon P 1 Iml u 1 H FltMlquot39 ltlto1 Fcwio l 2 quot A Q2imgu H Qmeufmm claw314 5germ A 47 o94 39d39n cJ Jo lt 9cdUL23 7 ltf39 3E U Z quotquot 0 3 20 4Qr23 1 a mpmw QcnJo 6 521 C34 41 Jga L wi 2 E sax H r1 J39i7J3 M49 H A quot C E 23 3 1 39 C pj Q 6QquotquotaZ H r39SH 39 Xl quot H 150 F D 31no C45 8 21 x as 00 J quotquot 0 I 0 C aJq quotiz39 3Ey OX I E E 2 0oJ 539 T CMV 6 g G 3390 790 C 160 10 39 2 I Evlte EU3J Mae 1 S2 9 32640 we 32lt 2ltlt Xe 66
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