CHEMISTRY 101 SPRING 2009 EXAM 1 FORM A SECTION 501 DR. KEENEY-KENNICUTT PART 1

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1 NAME CHEMISTRY 101 SPRING 2009 EXAM 1 FORM A SECTION 501 DR. KEENEY-KENNICUTT Directions: (1) Put your name on PART 1 and your name and signature on PART 2 of the exam where indicated. (2) Sign the Aggie Code on PART 2 of this exam. (3) Each multiple choice question is actually 2 questions on your scanning sheet. If you are sure of an answer, put the same answer down for both questions for 5 pts. If you cannot decide between two answers, put your BEST answer down for the ODD/FIRST question for 3 pts and your SECOND BEST answer down for the EVEN/SECOND question for 2 pts. If there is an ambiguous multiple choice question, use the last page to explain your answer. (4) Do NOT write on the envelope. (5) When finished, put everything in the envelope and wait to be excused. At the table, take everything out of the envelope. You can pick up the multiple choice part with the answers outside my office at 10am. (6) There are a total of 35 questions (19 actual questions). PART 1 1&2. Of the following symbol/name combinations of elements, which is WRONG? (a) tin/sn (b) calcium/ca (c) mercury/me (d) rubidium/rb (e) fluorine/f 3&4. The name of the 2A group is: (a) alkali metals (b) alkaline earths (c) halogens (d) transition metals (e) metalloids 5&6. In 2 moles of Ni(ClO 3 ) 2, there are (a) 2 Ni 2+ cations (b) 2 formula units of Ni(ClO 3 ) 2 (c) 12 x Avogadro s number of atoms of O (d) 2 moles of ClO 3 anions (e) 6.0 x moles of Ni 7&8. The 42 Ca 2+ ion has: (a) 20 p, 22 n, 22 e (b) 22 p, 20 n, 20 e (c) 40 p, 2 n, 38 e (d) 20 p, 22 n, 18 e (e) some other combination of p, n, e Keeney-Kennicutt, 2009 A1

2 9&10. In Rutherford s gold foil experiment, which of the following statements is/are TRUE? (1) The gold foil was bombarded with positively charged He nuclei. (2) Most of the bombarding particles were deflected straight back by the gold foil. (3) The experiment showed that the atom is mostly empty space. (a) 1, 2, 3 (b) 3 only (c) 2, 3 (d) 1, 3 (e) 1, 2 11&12. Which of the following is an ionic compound? (a) CO 2 (b) (NH 4 ) 2 S (c) SCl 4 (d) HCl (e) Ni 13&14. A Brønsted-Lowry acid: (a) is a proton donor (b) is a proton acceptor (c) has an H and produces H + ions in aqueous solution (d) has an OH and produces OH ions in aqueous solution (e) contains a cation and an anion 15&16. Which of the following is a weak electrolyte in aqueous solution? (a) NaCl (b) MgCO 3 (c) HBrO (d) HClO 4 (e) NaOH 17&18. The following particle view of the end result of a gas phase reaction, where and represents the product, illustrates that it was: represents the reactant (a) a reaction that went to completion. (b) a reaction that did not occur at all. (c) a typical precipitation reaction. (d) a product-favored equilibrium reaction. (e) a reactant-favored equilibrium reaction. 19&20. If the empirical formula of an organic compound was CH 2, the molecular formula could be: (a) C 6 H 14 (b) C 2 H 6 (c) C 6 H 6 (d) C 3 H 4 (e) C 2 H 4 Keeney-Kennicutt, 2009 A2

3 21&22. What is the formula weight of Fe(NO 3 ) 2 6H 2 O? (a) 275 (b) 288 (c) 311 (d) 261 (e) &24. Identify the element if 4.27 moles of this element has a mass of 132 grams. (a) magnesium (b) aluminum (c) silicon (d) phosphorus (e) sulfur 25&26. Consider the hypothetical element, Kylefieldium (AW = amu/atom). It consists of two isotopes: 100 Ky with a mass of amu and 106 Ky with a mass of amu. What is the % abundance of the heavier isotope, Ky-106? (a) 83% (b) 50% (c) 77% (d) 17% (e) 91% Keeney-Kennicutt, 2009 A3

4 27&28. What is the empirical formula for an oxide of bromine that is 65.2% Br by mass? (a) BrO (b) BrO 3 (c) Br 2 O 3 (d) Br 3 O 7 (e) Br 3 O 8 29&30. Calculate the % bromine by mass in the compound, AlBr 3. (a) 30.% (b) 70.% (c) 50.% (d) 90.% (e) &32. What mass of AlBr 3 (in mg) has 2.5 x atoms of Br? (Don t forget the relationship between Br and AlBr 3 ) (a) 3.7 mg (b) 12 mg (c) 1.3 mg (d) 8.4 mg (e) 19 mg Keeney-Kennicutt, 2009 A4

5 CHEMISTRY 101 EXAM 1 Form A SPRING 2009 Section 501 NAME PLEASE BLOCK PRINT PART 2 Please read and sign: On my honor, as an Aggie, I have neither given nor received unauthorized aid on this exam. (10 pts) 33. Give the appropriate IUPAC name or formula for the following compounds: (a) carbonous acid (b) (c) copper(ii) chloride sodium sulfide (d) As 2 O 5 (e) Cr(ClO 4 ) 3 (4 pts) 34. Balance the following equation using whole number coefficients (Cl = chlorine). KClO 3 KCl + O Predict the products and balance the reaction for this precipitation reaction: (2 pts) Fe(NO 3 ) 3 (aq)+ Na 3 PO 4 (aq) (s) + (aq) (2 pts) What is the net ionic equation? (2 pts) What is/are the spectator ion(s)? Keeney-Kennicutt, 2009 A5

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7 SCRAP PAPER OR COMMENTS ON EXAM CHEMISTRY 101 EXAM 1 Form A Spring 2009 Section 501 NAME Keeney-Kennicutt, 2009 A7