CHM104-2007 - WAGGA WAGGA ORANGE CAMPUSES SCHOOL OF WINE...

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WAGGA WAGGA & ORANGE CAMPUSES SCHOOL OF WINE & FOOD SCIENCES AUTUMN EXAMINATION 2007 CHM104 - CHEMISTRY 1A INTERNAL/EXTERNAL LECTURERS: Dr Andrea Bishop, Dr Igor Novak DAY and DATE: TIME: WRITING TIME: Three (3) hours READING TIME: Ten (10) minutes MATERIALS SUPPLIED BY UNIVERSITY: General Purpose Answer Sheet 2B pencil MATERIALS PERMITTED IN EXAMINATION: Battery Operated/Solar Calculator (no printer) VALUE: 56% NUMBER OF QUESTIONS: Fifty six (56 ) INSTRUCTIONS TO CANDIDATES: ALL questions are to be attempted. PART A - 25 multiple choice questions, each worth 1 mark. Total marks 25 PART B - 25 multiple choice questions, each worth 2 mark. Total marks 50 PART C - 6 short answer questions. Total marks 50. Answers to Part C are to be given in the spaces provided on exam paper. Answers to Parts A and B to be recorded on multiple choice ANSWER SHEET Make dark marks that fill the relevant oval completely Use only 2B pencil to record answers to multiple choice questions Erase mistakes fully Do not bend or fold answer sheet Leave no stray marks Data required are given on the last two pages or with the question. INSTRUCTIONS TO INVIGILATORS Question paper may not be retained by the candidate. STUDENT NAME: .................................... STUDENT NUMBER: ............................................................. CHM104 200740 Page 1 of 21
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STUDENT SIGNATURE: ............................................................................................................................... CHM104 200740 Page 2 of 21
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PART A 25 multiple choice questions, 1 mark each, Total 25 marks RECORD ANSWERS ON ANSWER SHEET PROVIDED Make dark marks that fill the relevant oval completely Use only 2B pencil to record answers to multiple choice questions Erase mistakes fully Do not bend or fold answer sheet Leave no stray marks 1. Which of the following correctly expresses 52,030.2 m in scientific notation? a. 5.20302 × 10 4 m b. 5.203 × 10 4 m c. 5.20 × 10 4 m d. 5.2 × 10 4 m 2. Which of the following is a chemical change? 3. Calculate the molar mass of (NH 4 ) 3 AsO 4 . 4. Calculate the number of moles in 17.8 g of the antacid magnesium hydroxide, Mg(OH) 2 . 5. Titanium(IV) oxide (extensively used as a white pigment) reacts with bromine trifluoride to form titanium(IV) fluoride, bromine, and oxygen. 3TiO 2 ( s ) + 4BrF 3 ( l ) 3TiF 4 ( s ) + 2Br 2 ( l ) + 3O 2 ( g ) How many moles of bromine trifluoride are needed to react completely with 9.68 mol of titanium(IV) oxide? a. 12.9 mol b. 9.68 mol c. 7.26 mol d. 3.23 mol CHM104 200740 Page 3 of 21
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