Chemistry Exam 1: Multiple Choice Questions and Formulas, Exams of Chemistry

Download Chemistry Exam 1: Multiple Choice Questions and Formulas and more Exams Chemistry in PDF only on Docsity! Page 1 of 5 Exam 1 Name: _______________________________ Chem 111 2:30p section Evening Exam #1 This exam is composed of 20 questions, 6 of which require mathematics that might require a calculator. Go initially through the exam and answer the questions you can answer quickly. Then go back and try the ones that are more challenging to you and/or that require calculations. As discussed in the course syllabus, honesty and integrity are absolute essentials for this class. In fairness to others, dishonest behavior will be dealt with to the full extent of University regulations. I hereby state that all answers on this exam are my own and that I have neither gained unfairly from others nor have I assisted others in obtaining an unfair advantage on this exam. __________________________________ Signature E = h = hc En H atom = RH hc n2 1 mL = 1 cm3 Some common ions: PO4 3– CN– CH3CO2 – NO2 – NO3 – CO3 2– SO3 2– SO4 2– h = 6.626x10 34 J s c = 2.9998x108 m s –1 N = 6.022x1023 mol –1 RH = 1.097x10 7 m –1 PERIODIC TABLE OF THE ELEMENTS 1A 2A 3B 4B 5B 6B 7B 8B 8B 8B 1B 2B 3A 4A 5A 6A 7A 8A 1 H 1.008 2 He 4.003 3 Li 6.939 4 Be 9.012 5 B 10.81 6 C 12.01 7 N 14.01 8 O 16.00 9 F 19.00 10 Ne 20.18 11 Na 22.99 12 Mg 24.31 13 Al 26.98 14 Si 28.09 15 P 30.97 16 S 32.07 17 Cl 35.45 18 Ar 39.95 19 K 39.10 20 Ca 40.08 21 Sc 44.96 22 Ti 47.90 23 V 50.94 24 Cr 52.00 25 Mn 54.94 26 Fe 55.85 27 Co 58.93 28 Ni 58.71 29 Cu 63.55 30 Zn 65.39 31 Ga 69.72 32 Ge 72.61 33 As 74.92 34 Se 78.96 35 Br 79.90 36 Kr 83.80 37 Rb 85.47 38 Sr 87.62 39 Y 88.91 40 Zr 91.22 41 Nb 92.91 42 Mo 95.94 43 Tc (99) 44 Ru 101.1 45 Rh 102.9 46 Pd 106.4 47 Ag 107.9 48 Cd 112.4 49 In 114.8 50 Sn 118.7 51 Sb 121.8 52 Te 127.6 53 I 126.9 54 Xe 131.3 55 Cs 132.9 56 Ba 137.3 57 La 138.9 72 Hf 178.5 73 Ta 181.0 74 W 183.8 75 Re 186.2 76 Os 190.2 77 Ir 192.2 78 Pt 195.1 79 Au 197.0 80 Hg 200.6 81 Tl 204.4 82 Pb 207.2 83 Bi 209.0 84 Po (209) 85 At (210) 86 Rn (222) 87 Fr (223) 88 Ra 226.0 89 Ac 227.0 104 Unq (261) 105 Unp (262) 106 Unh (263) 107 Uns (262) 108 Uno (265) 109 Une (266) c Page 2 of 5 Exam 1 Name: _______________________________ 1. What is the charge of the most common ion formed from Ba? 1) +1 2) +2 3) -1 4) -2 5) -3 (2) (OWL question) 2. What is the charge of the most common ion formed from Br? 1) +1 2) +2 3) -1 4) -2 5) -3 (3) (OWL question) 3. The correct molecular formula for the molecule at right is: 1) CO2H4 2) C2O2H4 3) C2O2H3 4) C2OH4 (2) 4. The equation at right yields a result in 1) length 2) mass 3) volume 4) velocity 5) time (4) 5. A specific isotope of an ion from a given element has 8 protons, 7 neutrons, and 10 electrons. The ion is: 1) Mn3+ 2) N3- 3) P3- 4) Ne3- 5) O2- (5) (from an OWL question 3-3c) 6. What is the formula of the ionic compound formed in the reaction of elemental K and F2? 1) KF2 2) KF 3) K2F3 4) K3F2 5) K2F (2) KF - K + + F- (OWL question) 7. What is the formula of the ionic compound formed between the ions Fe3+ and S 2– ? 1) Fe2S3 2) Fe3S2 3) FeS3 4) Fe2S 5) none of these (1) Fe2S3 - 2 Fe 3+ + 3 S 2– (OWL question) H3C C OH O kg m 2 s 2( ) m s 1( ) 1 kg( )