{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

PracticeExam1 - CHEM 1307 Exam 1 Version B Directions 1 The...

Info icon This preview shows pages 1–9. 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
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CHEM 1307 Exam 1 February 16, 2011 Version B Directions: 1. The only items you may have on your desk are: a scientific calculator, #2 pencils and an eraser. Ail other material must be left in the front of the room. 2. On your answer sheet in the space marked “NAME,” PRINT your name; in the space marked “SUBJECT”, print your course and section number. In the space marked “ID NUMBER,” fill in your Raider ID (R number) in the blank spaces starting on the left and bubble-in the corresponding numbers AND THE R below the blanks. Be sure to fill in your test version. Make dark marks on the answer sheets, not dashes. Erase completely if you change answers. 3. Put all scratch work on the exam pages. Do not put any extra marks on the answer sheet. You may keep the exam! 4. The exam consists of 30 multiple-choice questions. Choose the E best or correct answer for each question. Mark your choice on both the answer sheet and the exam paper. 5. You are to use only the answer sheet that is provided with the exam. Do not use any other answer sheet. The score that you receive for the exam will be the score on the answer sheet that you turn in and will not be changed for any reason. 6. Cell phones must be turned off and out of sight during exams. No PDA’s or MP3 players allowed. 7. The periodic table, constants, and useful equations are provided below. You must remain seated until at least 7:30 pm. ' m 1 atm = 760 mm Hg = 760 torr R = 0.08206 : 8.3145 Kmol Kmol h = 6.626 x 1044.15 c = 2.993 x 103 mfs ID : 3.34 x 10'30Cm RH=2.18x]0"sJ lcal=4.184.l e':1.60x10"9c R = 1.0974 x 107 m" F = 96458 C/mol Periodic Table of the Elements 1 18 1A 8A 1 2 2 13 14 15 16 17 1.008 2.4 _ 3A 4A 5A 4.003 3 4 5 6 7 6.941 9.012 10.81 12.01 14.01 11 12 13 14 15 16 17 18 Na Mg 8 Cl Ar 22.99 24.31 3 8 83 26.98 28.09 30.97 32.07 35.45 39.95 20 22 23 24 25 26 27 26 29 30 31 32 33 34 35 36 Ti V Cr Mn Fe Co Cu Zn Ga Se Br Kr .88 50.94 52.00 54.94 55.85 58.93 58.69 63.55 65.39 69.72 72.59 74.92 78.96 79.90 63.80 51 52 4 5 6 7 8 9 10 11 12 3 B 4 19 21 K Ca Sc 39.10 40.08 44.96 47 37 38 39 40 41 42 43 44 45 46 47 48 49 50 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Cd In Sn Sb Te l Xe 65.47 87.62 88.91 91.22 92.91 95.94 (98) 101.1 102.9 106.4 107.9 112.4 114.8 118.7 121.6 127.6 126.9 131.3 55 56 57 72 73 74 75 76 77 7B 79 80 81 62 83 64 65 86 0: Ba La Hf Ta W Re Os lr Pt Au Hg Tl Pb Bi Po At Rn 132.9 137.3 138.9 178.5 180.9 153.8 186.2 190.2 192.2 195.1 197.0 200.6 204.4 207.2 209.0 (222) 87 88 89 104 105 106 107 108 109 Ra Unp Unh Uns Uno (223) (226) (227) (257) What is the coefficient for C (s) when the following equation is balanced? Ca3(PO4)2 (s) + SiOz (S) + C (S) 9 CaSi03 (s) + CO (9) + P4 (5) CID-bk) 10 14 EDP-PET?” How many mL of 5.00 M KCI solution are needed to make 1.50 L of 0.200 M KCi solution? 125 mL 60.0 mL 667 mL 37.5 mL 305 mL $09.09"?! What is the formula for lead(II) oxide? PbO Pb02 Pb20 Pb04 Pb203 509099: A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters? a. 3.5 x105cL b. 3.5 x 104 cL c. 3.5 x 10“ cL cl. 3.5 x10'3 CL e. 3.5 )(10'2 cl. What is the oxidation number of carbon in carbonic acid, H2C03? +1 +4 -3 0 +2 9:91.09er In the order written, the following reactions are examples of: Cu (5) + 2 Ag+ (aq) 9 Cu2+ (aq) + 2 Ag (5) HNO3 (aq) + KOH (aq) 9 KN03 (aq) + H20 (l) 1362+ (aq) + 5042' (aq) -> PbSO4 (s) redox reactions acid-base reactions precipitation, acid-base and redox reactions, respectively redox, acid-base and precipitation reactions, respectively precipitation, redox and acid-base reactions, respectively {0510.591 Calculate the mass of solute needed to prepare 275.0 mi. of 0.150 M sodium chloride solution. 41.3 g 31.9 g 16.1 g 8.77 g 2.41 g roe-0539’ Hydroxylamine nitrate contains 29.17 % N, 4.20 ”/0 H and 66.63 % O by mass. If its molar mass is between 94 and 98 g/mol, what is its molecular formula? NHzOs N 2H404 N3H303 N4H302 N 2H204 EDP-£2.55” 10. 12. A 5.95 9 sample of AgNO3 is reacted with excess 8302 according to the balanced equation below to yield 4.19 g of A90. What is the percent yield of AgCl? 2 AgNO3 (aq) + BaCl; (aq) —) 2 AgCI (s) + Ba(N03)2 (aq) a. 59.4 0/0 b. 70.4 0/o c. 41.7 % d. 83.5 % e. 100 0/0 What is the sum of the coefficients when the following equation is balanced? pbs (5) + 02 (g) —> PhD (5) + 50; (g) avenge» I—‘kD‘sJU'ILU . Which of the following is a weak electrolyte? HBr LiOH H2CO3 H2504 NaOH {Denver In the reaction shown below, Na: 4 Na (5) + 02 (g) 9 2 Na20 (s) gains electrons is the oxidizing agent precipitates is the reducing agent is reduced 9:90.094 13. How many grams of cobalt are found in 4.31 x 1025 atoms of cobalt? 71.6 g 455 g 0.823 g 58.9 g 4.22 x 103 9 9°53»??? 14. Select the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper(II) nitrate. CuS . CUzS NH4N03 NH4(NO3)2 CUSO4 £09.00!” 15. What mass of NaOH is required to react completely with 25.0 mL of 3.0 M H2504? 3.0 g 0.70 g 6.0 g 150 9 None of these 5051.0ch 16. An atom of the most abundant isotope of gold 197Au has protons, neutrons and electrons. a. 197, 79, 118 b. 118, 79, 39 C. 79, 197, 197 d. 79, 118, 118 e. 79, 118, 79 17. What is the percent composition of chromium in calcium chromate, CaCrO4? 37.1 % 33.3 % 40.6 % 52.0 % 68.3 % EDP-53.575” 18. When 4.72 g of chlorine dioxide reacts with 0.947 g of water according to the balanced equation below, how much excess reactant remains? 6 002 (g) + 3 H20 (I) -> 5 HCl03 (aq) + HCI (aq) 0.425 g 0.630 g 1.58 g 0.317 g 3.77 g EDP-PP"? 19. A certain element consists of two stable isotopes. One isotope has an atomic mass of 106.9 amu and a natural abundance of 51.84 %. The other isotope has an atomic mass of 108.9 amu and a natural abundance of 48.16 %. What is the atomic weight of the element? 105.9 amu 106.9 amu 107.9 amu 108.9 amu 109.9 amu {De—.0339: 20. How many molecules of methane are there in 0.123 moles of methane (CH4)? a. 5 molecules 6. 2.46 x 10'2 molecules c. 2.04 x 10‘25 molecules d. 7.40 x 1022 molecules e. 0.615 molecules 21. 22. 23. 24. When 0.880 g of a compound containing carbon, hydrogen and oxygen is burned, 1.760 g of C02 and 0.720 g of H20 are formed. What is the empiricai formula of the compound? C3 H502 CHO C2H20 C2H40 C3H504 {Deeper Which of the following chemical formulas is wrong? a. Al2(504)3 b. LiHC03 C- M92N3 d. BaClz e. AgClO4 Which of the following statements is true? i. All compounds containing acetate ion are soluble. ii. All compounds containing sulfide ion are insoluble. iii. All compounds containing lead(II) ion are insoluble. a. land ii b. iand iii c. iii only d. i, ii and iii e. ioniy Which one of the following combinations of names and formulas is incorrect? a. NH4+, ammonium ion b. 52', sulfide ion c. CN", cyanide ion d. 8032', sulfite ion e. 003', perchlorate ion 25. 26. 27. 28. How many moles of sodium fluoride are needed to form 4.49 moles of sulfur tetrafluoride? 3 SO; (I) + 4 NaF (S) 9 SF4 (g) + SZCIZ (I) + 4 NaCl (5) a. 46.2 moles b. 40.0 moles c. 18.0 moles d. 4.88 moles e. 1.22 moles List the classification of each element in the given order. F, Cr, Rb a. halogen, metal, nonmetal b. nonmetal, main group element, alkali metal c. halogen, transition metal, alkali metal d. nonmetal, nonmetal, alkaline earth metal e. halogen, alkali metal, nonmetal Calculate the moiarity of a solution containing 15.66 g of KClO4 in 250 mL of solution. a. 0.0626 M b. 16.0 M c. 2.21 M cl. 0.692 M e. 0.452 M Based on chemical nomenclature rules, what is the proper name for P4010? a. tetraphosphorus oxide b. phosphorus decaoxide c. phosphorus oxide d. tetraphosphorus decaoxide e. phosphorus oxygen 29. A mass of 0.4113 g of an unknown monoprotic acid, HA, is titrated with NaOH. If the acid reacts with 28.10 mL of 0.1055 M NaOH, what is the molar mass of the acid? a. 2.964 x 10'3 g/moi b. 9.128 g/moi c. 337.3 g/mol d. 138.7 g/mol e. 98.6 g/mol 30. What are the spectator ion(s) in the reaction between aqueous hydrosuifuric acid (H25) and aqueous sodium hydroxide? a. There are no spectator ions. b. 2 OH' (aq) c. 82‘ (aq) d. 2 11* (aq) and 52‘ (aq) e. 2 Na+ (aq) ...
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