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Exam1_key - CHM114-A . EXAMI This l: :10 VF.-...

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Unformatted text preview: CHM114-A . EXAMI This l: :10 VF.- February20,2004 .ll‘dewl‘S wwruarrmfi IE “luau-shoal lash-o 53°:— J Mack Prof. A. Angel] Spring 2004 Name Section DICE. Choose the one alternative that best completes the statement or answers the question. Thom. MULTIPLE ) Which of the following is a dternical property of Water? / _ . .. ' A) It boils at 100°C at 1 atm pressure. 5‘ A ‘4 (fr ‘M “Mb-h 0 "‘ ‘WX?’ B)ltfreezesat0°Cal1atmpressure. . “Ltd‘- +‘ “5 l"°°‘ WM! 0 ‘l ‘ C) It is a liquid at room temperature. ' Tl"- -3 q “1'0 'l't o m d [QC/(I M c-"J S+L~°ktu~d+£ who lCr'sonJ 'Tlmir {*wff aha 11:35,” @It can be decomposed into oxygen and hydrOgen gases. 3:}- Lfv is E) These are all chemical properties of water. 5“) 3 2) The gold foil experiment performed in Rutherford's [ab . [.4 L. n 0(— cu} l‘ . I{ A) utilized the deflection of beta particles by gold foil 12. on. T3 or»; 0‘} a; 53¢}. *4— B) confirmed the plum—pudding model of the atom ‘h‘; on”; w H m ’7 l ' ‘4 Jlo © led to the discovery of the atomic nucleus U a. lung 01: hum/hr 0.1.“? D) was the basis for Thompson's model of the atom W ' u-l 6L lo e. D - O . E) proved the law of multiple proportions ll“ “4a.: Mr. U c 0 - 1+ indtcp'lu. {KCMLDH4— ’ I “ll, 3) Of the following, the smallest and lightest subatomic particle is the .'-* "" F M 555 M-d urn—«.1 4 we. a 1 al A) nucleus B) proton C) neutron © electron E) alpha particle 4) All atoms of a given element have the same A) density [1 S410 B) mass C) number of electrons and neutrons .w'l'r‘ 0 @ number of protons E) number of neu trons be M dl’” 5) Which atom has the smallest number of neutrons? 0. LE) A) neon-2|] B) carbon—l4 C) oxygen-16 © nitrogen-14 E) fluorine-19 S 0 ,5 6L: 6) Which one of the following does not occur as diatomic molecules in elemental form? 0:11 (:9 sulfur B) oxygen C ) hydrogen D) bromine E) nitrogen b 2)?) 010 Ir“) Which one of the following molecular formulas is also an empirical formula? Olav. A) C6H5 B) 11213406 @ (321-1550 0) H202 E) C6H502 8) Magnesium reacts with a certain element to form a compound with the general formula MgX. What would the 3 310 most likely formula be for the compound formed between potassium and element X? .1 only5 A) KZXZ @Kgx C) 10(2 0) K2X3 E) KX U. *612} Predict the empirical formula of the ionic compound that forms from magnesium and oxygen. 3:"? g A) M902 MgO C} MggO D) M3202 E) Mg02 (bl ' {1010) Which species below is the nitride ion? 0. i5, A} NO3‘ @N 3- _ C) N102— o) NH4+ E) Na+ ,JLHJ What is the empirical formula of a hydrocarbon that contains 89.94% C by mass? ‘0 l ' 5 ® C3H4 B) C4H3 C} cant; D) Cngo E) ch o - T “t 12) When aqueous solutions of are mixed, a precipitate (insoluble compound) forms. at . a] {to A} 1(2-504 and CrC13 ' . NiBrg and AgNog, AYE! La {M W 0 "1' a Cl LizCO3 and C51 D} KOH and BaiN03)2 E) Na] and KBr 13) A neutralization reaction between an acid and a metal hydroxide produces S (951,, G9 water and a salt B) ammonia . f 0 5 C) oxygen gas D) sodium hydmxide E) hydrogen gas 3% 1%. 14) Which compound has the atom with the highest oxidation number? 0 2 0| A) CaS B) Ni-I4Cl C}Na3N @ M3503 E) A1(N02)3 15) Based on the activity series, which one of the reactions below will occur? 51» ® 2AgNO3 (aq) + Pb{s} —» 2A3 (s) + Pb(NO3)2 (aq) 63’ B} 3FeBr2 (aq) + 2Au(s) -* 3Fe (s) + 2AuBr3 tag) 0‘6 3 C}3Hg(l) + 2Cr(N03]3(aq) —- 3Hg(N03)2 + 20(5) D} SnC12 (aq) + Cu (s) -* Sn (5) + CuClz (aq) E) Zn(s) + Mn12(aq) - Zn12(aq) + Mn (5} 16) Which one of the following statements is false? A} at: = q + w eg‘qo The actual numerical value of E can be measured. C) E is a state function. 0 -”6l DJfiE:Eiinal'EinitiaI E) When a system undergoes a process in which it gains energy from the surroundings, the AE for the process is positive. 1'?) The internal energy ofa system is always increased by (9 1,61,; A) having the system do work on the surroundings 1 B) adding heat to the system and having the system do work on the surroundings i 0 - 1‘” C) withdrawing heat from the system D) adding heat to the system E) a volume compression . was. _ LA 18} Which one of the following is an exothermic process? “fl-M 5 [av/[9‘7" I A)boiling soup 39°14 Cf“ "Jpn-r mm“ ‘4' Orr/v Q- 3 condensation of water vapor 8.8 .L .L, L. w M i . Pr“ ‘1 r“ fir aw” wt" 0 - 5 C) water evaporating +1, N. 0 few 1,: . . [paw ft LXI" ' "re *" I D) ice melting c w [M 9a- 9 0‘3» M” E) Ammonium thiocyanate and barium hydroxide are mixed at 25°C: the temperature drops. 19) The value of 5.1-1“ for the reaction below is 482 k}. Calculate the heat (kl) released to the surroundings when 12.0 g of CO (g) reacts completely. 3% 2C0[g) + 02 (g) —’ 2C02 (g) A} 65.7 B) 2.39 x 103 C) 193 D) 482 E) 207 20) Which one of the following is correct? 13'542‘45 A)?L=cu B)v=c}t Clv+k=c D)v+}.=c ®v7t=c ‘1»: 0 ' '7’? 6-f- JZF 21} What is the frequency (5'1) of electromagnetic radiation that has a wavelength of [L53 m? 1 610 wt, A)1.3x10—9 B)1.3x1033 chemo-33 ©5.7x198 E) 1.6x103 H- I E “L, 22) The energy ofa photon that has a wavelength of 13.2 nm is J. :8 {£- 0. 57 @ 1.51 x 10-17 B) 9.55 x 10-25 01.62 x 10-17 o) 4.42 x10‘23 E)1.99 x 10-25 5"}, JLO 23) Of the following transitions in the Bohr hydrogen atom, the transition results in the emission of the hi ghest—energy photon. lo 0-5 A}n=3—-n=s n=6—~n=1 C)n=1-—~n=4 D)n=1—-n=6 E]n=6—-n=3 24) The lines in the emission spectrum of hydrogen result from 7 grog? 4,! A) electrons given off by hydrogen when it burns B) protons given off when hydrogen burns g I; C) electrons given off by hydrogen as it cools o \ g 7’ D} decomposing hydrogen atoms E) energy given off in the form of visible light when an electron moves from a higher energy state to a lower energy state 10% 25) The wavelength of an electron whose velocity is 1.7 x 104 mfs and whose mass is 9.1 x10'23 g is m. L A) 12 B) 4.3 x 10-8 C) 4.3 x 10-11 o) 2.3 x 10*? E) 2.3 )(1047 b - 2' 26 BONUS UESTION S‘lq‘o J Q ' ire er Given the following reactions CaCO3 (s) » Ca0(s) + C02 (g) AH = 173.1 k} C {5, graphite) + 02(g) —- C02(g) 13H: -393.51<J the enthalpy of the reaction CaCO3 {5) —~ Caois) + C(s.graphitel + 02 (g) is k]. B) 7.01 x 104 C) -215.4 0) 215.4 E) -571.6 ...
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Exam1_key - CHM114-A . EXAMI This l: :10 VF.-...

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