exam 2 key

exam 2 key - EXAM 2 (CH101.001 Spring 2008) Name (print) w...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: EXAM 2 (CH101.001 Spring 2008) Name (print) w K E y MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. honor pledge (sign) 1) Determine the name for N205. @dinitrogen pentaoxide n itrogen oxide C) nitrogen (lV) oxide D) nitrogen (ll) oxide E) nitrogen tetraoxide 2) How many millimoles of Ca(NO3)2 contain 478 x 1022 formula units of Ca(l\lO3)2? The molar mass of Ca(NO3)2 is 164.10 g/mol. ’ A) 12.6 minol Ca(l\l03)2 l 1 2 z. . i i, W ~ .7 ' to mists Ca N0 . . B) 13.0 mmol Ca(NO3)2 it) 8 3 “g a“ 3’1) (3.022 x to” was!) C) 20.7 mmol Ca(NO3)2 79.4 mmolCa(N03)2 : Onowmqi My C 1060 (Mum). j 2 W‘mai‘ E) 57.0 mmol Ca(l\lO3)2 M {Mel W {Mel a, \ ._ ,. \ 3) Write the name for Sn(SO4)2. ‘ tin (l) sulfite tin (IV) sulfate tin sulfide D) tin (ll) sulfite E) tin (l) sulfate 4) How many atoms of oxygen are contained in 47.6 g of A12(CO3)3? The molar mass of A12(CO3)3 is 23399 g/ mol. . « ~ law) \ "(5322 x; (gavmleculfé sl Q'gVW3 A> 1-23x1023 o W WWW QJKWKFWW‘ mm B) 2.96 x 1024 O atoms 0 2.87 x 1025 O atoms 2 g“ 50 x ((724 {Q~a}pms ® 1.10 x 1024 O atoms 13) 3.19 x 1024 0 atoms 5) Write the formula for the compound formed between potassium and sulfur. A) KS B) KS2 @Kzs D) K2803 E) K382 6) Write a balanced~ equation to show the reaction of sulfurous acid with lithium hydroxide. A) H2804 (aq) + LiOi—l (aq) —> H20 (1) + L12504 (aq) @HZSO3 (aq) + 2 LiOH (aq) —> 2 H20 (1) + 1312303 (aq) C) H803 (aq) + LiOH (aq) ~> H20 (1) + LiSO3 (aq) ‘ D) H804 (aq) + LiOH (aq) ~> H20 (1) + 1.1504 (aq) E) H28 (aq) + 2 LiOH (aq) —> 2 H20 (1) + L128 (aq) 7) Determine the empirical formula for a compound that is 36.86% and 63.14% 0 by mass. 0 B) N20 C) N02 D N203 E) N03 A) N ‘ , E 9i ((931%5) 1:009 : 3.63%: ml oxygen X2 " O . :2”; N C} ggg‘ghfi\)hfifg 12.69% Wi M30?“ 21031 2.9-3). i Us 7 2 3 8) Give the net ionic eguation for the reaction (if any) that occurs when aqueous solutions of NaZCO3 and HCl are mixed. Q (a 025M) A) 2 H+(aq) + C032‘(aq) a H2C03(s) (O‘igg T2,. 1\ I a " WM fl B) 2 Na+(aq) + CO32'(aq) + 2 H+(aq) + 2 Cl”(aq) —> H2CO3(s) + 2 NaCl(aq) { 0.15013) @ 2 H+(aq) + C032“(aq) —> H200) + C02(g) } @9333 PA D) 2 Na1‘(aq) + C032“(aq) + 2 H+(aq) + 2 Cl’(aq) ~> H2CO3(s) + 2 Na+(aq) + 2 Cl‘taq) j E) No reaction occurs. f“ 9) Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M Ca(NO3)2 solution to 150.0 mL. A) 1.13 M B) 0.0887 M {9 0.0313 M D) 0.0199 M E) 0.0501 M 10) How many chloride ions are present in 65.5 mL of 0.210 M A103 solution? ' 23 I” A) 4.02 x 1023 chloride ions 230 gig (53:0 (@4559 x m W0“) K Baguiaiifl N B) 5.79 x 1024 chloride ions ‘- mot miewfii b {@249 x 1022 chloride ions D) 8.28 x 102] chloride ions 2. (is X )0 E) 1.21 x 1022 chloride ions 4?“ s 2 Cl MM (3) 343telol‘ “5 11) Determine the percent yield of a reaction that produces 28.65 g of Fe when 50.00 g of Fe203 molar mass 2 159.7 g/mol) react with excess Al according to the following reaction. < Z’i‘é9§\; M00 : 50/; 3%.‘103 ( 0) Wm Mu Filing H , mi Fe2O3(s) + 2 Al(s) —> A1203(s) + 2 Fe(s) 19 ‘50.6033( Ewing 2: Mai \\ F9203 12)d§%;fimFflmmm : (0.3(3 Mat F2303) <%“ig%\fi 0'62.er E a"; ‘17 e” M t 3 93920 wtxsms 93.2) = 3L1.”th A) 61.03 “n B) 28.65 % C) 57.30 "0 D) 20.02 % 81.93 00 Fe 12) How many grams of oxygen are formed when 0.621 moles of KOH are formed? {M01 w, [0 {:Q’ZE Mat *Mgg u- 0. M3 2 ’ ! (\OJ‘E’S mfflgzmg/md : 49373 a); A) 19.9 g 02 B) 27.9 g 02 @ 4.97 g 02 D) 3.59 g 02 E) 11.7 g 02 4 KO(s) + 2 H200) *—> 4 KOH(s) + 02(g) 13) Which of the following pairs of aqueous solutions will react when mixed? A) LiOH + NaZS B) (Ni—1402804 + L1Cl m g ‘ @r(c2H302)2 + Nazso)l M 5? 50a (9) +21%. 63560.). fiffidytiuiifiv" “in. D) KNO3 + NaOH E) None of the above solution pairs will produce a reaction. 14) Calculate the energy of the red light emitted by a neon atom with a wavelength of 703.2 nm. A)3.54x10‘19l E R 3),“) : 3hr; w<§mgg xg3~3%33>(3.oo Noam/g) B)4.27x-10-=19] Pi“ “ 13"" " W: “qwm‘” '” [03.22. X 10 m C) 2.34 x 10'19 J' D) 6.45 x 10-19] @283 x 1049] 15) Place the following types of electromagnetic radiation in order of decreasing energy. ultraviolet light radio waves microwaves A) radio waves > microwaves > ultraviolet light (B3 ultraviolet light > microwaves > radio waves C) radio waves > ultraviolet light > microwaves 6 D) ultraviolet light > radio waves > microwaves m: .2. 23 E) microwaves > radio waves > ultraviolet light :: (3i g ’3} 16) How orbhtals are contained in the second shell (11:2) of a given atom? / A) 1 13) 2 C) 9 (t3 4 E) 3 K.‘ 17) What is the mass (in kg) of 6.89 x 1025 molecules of C02? The molar mass of C02 is 44.01 g/moi. A) 3.85 kg @504 kg C) 2.60 kg D) 3.03 kg E) 6.39 kg / , 2s \ mlfii’inm \ k (9.43? X ‘10 witcde‘éjh‘on “azamkwguj 18) Which of the following is an oxidation—reduction reaction? ! W" 4 MORE; A) Ham) + LiOH(aq) a LiCl(aq) + 1320(1) (m. 4 Wm» ( MACE 13/43 E) t 593% B) Nal(aq) + AgN03(aq) —> Agl(s) + NaNO3(aq) 3 <3) Pb(C2H302)2(aq) + 2 NaCl(aq) ~» PbCl2(s) + 2 NaC2H3O2(aq) if“ x \ KB) Mg(s) + 2 HCl(aq}) h/lgCl2(aq) + H2(g) . M3 3 Mam- M HQ E) All of the above are OXidation—reduction reactions. “ 6 a.“ 19) Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does not contain an error. A) n = 2,1: 2,11112—1 B)n=2,l=2,ml:0 Whemwm‘ihan “4 C)rz:3,l:2,ml=—3 Wig kwwfi ,14‘3 139’ i124,l:3,ml:—2 )n=4,l:2,m'l=+4 20) Determine the name for HClOB. A) hydrochloric acid C4103 : Chifira+e B) hydrochlorus acid f u ‘ ‘ g ) Chlorate acid H $03 ? Wiring. «Cid D chloric acid 4) perchloric acid 21) Write the formula for barium nitrite. A) Ba3N2 \\ w B) BaNO3 / ‘ N0 2 C) BN 1i Ba(l\l02)2 84 E) B(l\l02)3 22) Determine the empirical formula for a compound that is found to contain 10.15 mg P and 34.85 mg Cl. A) P3C1 B) PCl C) PC12 D) P2Cl3 ® PC13 23) Determine the molecular formula of a compound that has a molar mass 0131832 g/mol and an empirical formula of C2H502. A) C2H502 ; @CéHlSOE) \Q‘” WW l3 3’“ : wit Pig/ml: C) C3H7O3 D) C4H10C’4 fl :1 3 E) C8H2008 24) According to the following balanced reaction, how many moles of NO are formed from 8.44 moles of N02 if there is plenty of water present? 3 N02(g) + H200) a 2 HNO3(aq) + NO(g) ‘mmar “' ‘ MNO 2.81 .1 NO (8% ml New.) «C \ ~ 2.3) @9253 NO ‘ Q ’3qu N02. C) 8.44 moles NO D) 5.50 moles NO E) 1.83 moles NO 25) Determine the limiting reactant (LR) and the mass (in g) of nitrogen that can be formed from 50.0 g N204 and 45.0 g N2H4‘ Some possibly useful molar masses are as follows: N204 = 92.02 g/mol, N214); : 32.05 g/mol. ff ‘Wg \ _ I Mel A316” _ @wfifmiiy 3343 Mel Nani? N204(l) + 2 N2H4(l) —> 3 N2(g) + 4 H20(g) . ~ A ’ 1 ml M 7})“ liliofxfisfl : mo M Night A) LR : N2H4, 59.0 g N2 formed ’ B)LR=N 0,10r N formed . ,. 2 W“) © 2 4 3g 2 Jig MW 2 M“? 3 “i LR : N204, 45.7 g N2 formed N \ ml Nlfi‘ D) LR = N2H4, 13.3 g N2 formed 1&4 Nzlla E) No LR, 45.0 gN2 formed “Wm M mess al, Nat) W W) N: 0s is limih M aim shoes/M 3m: 26) Which of the following pairs of aqueous solutions will react when mixed? 7 Rant Mg, m A) HC1+ LiOH message m “3 ml “20% «ME ~ l m mol M: B) 1.125 + HCI gas “Farah-M3 rm 1 H13 a: \) /a4:£d'hase m “‘0‘ 1 ‘tl C) KZCO3 + HNO3 aad~3q5e NM {/5454 firming mm m” {i (at? We {7.8.02.3 - D) MgCl2 + KOH FWPifah‘w rim Ma, (0901(3) \" 3 mt ' @All of these solution pairs will produce reactions. 23 a. 3 (0.2an sfeama : 392.) + shame 27) Determine the oxidation state of P in P033". P t +3 g; B) +6 C) +2 D) o E) -3 28) Determine the reducing agent in the following reaction. 2 tr 4. s.“ W zut’ + Fe 2 Li(s) + Fe(C2H3OZ)2(aq) —> 2 LiC2H3OZ(aq) + Fe(s) Lithium helm? metal (is “dud”? 'M (1.30%)) A) o B) H C) C D) Fe W initials m )jp‘icall») flow at S. scratch sheet and periodic table FERIC‘DIC TABLE GROUP I A II A III A IV A V A V} A VII A '1 VIII A——* I B 1113 II] 13 1V B "\e’ 13 VI B VII B VIII B Metals Nonmetais (1’ Transition Elements :31 Ga 69.723 49 ‘ in ‘ 1M 1m Unq ~ . — Aiamic number (2mm ‘ (1213 Liquid - ‘ , . Atomic mass {g mgr") f Transition Elements 65 66 Th Dy 15856 1%‘50 *Lan than ides (Rare Earths) “Actin ides @5710} (233.103 : ,. Fram Princxp/es of Eiectrmic Wrerials and Devices Seamd Edirim 8.0. Kasai) ('31) McGrawwi-liil, 2002) http://i‘viateriais. Usask. Ca 3% “3 Ebidngfigfi Caflgéamf 3 @323? K it} 5 ...
View Full Document

Page1 / 5

exam 2 key - EXAM 2 (CH101.001 Spring 2008) Name (print) w...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online