C205_final_w06_all_sections_hints

C205_final_w06_all_sections_hints - Course: CHEMISTRY...

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Unformatted text preview: Course: CHEMISTRY Number: 205/4 Section: 03, 04 and 52 Instructors: P.H. Bird, C.W. Rogers Examination: Final Date: 28 th April, 2006 Time: 19:00 - 22:00 # of pages: 14 Materials Allowed: A data sheet and periodic table are attached to this paper - no other materials are allowed . Calculators Allowed: Yes (Cell phones or electronic dictionaries may NOT be used as calculators.) Special Instructions: This exam contains three sections. Please read the instructions before each section carefully. LAST NAME: ____________________________ FIRST NAME: ____________________________ STUDENT NUMBER: _____________________ SIGNATURE: ____________________________ PLEASE READ THIS PAGE WHILE YOU WAIT TO START. • Check that you have 14 pages including this page. Please write your ID # on all pages. • A periodic table and “useful information” are provided; you CAN remove those pages. • Non-programmable calculators are allowed; cell phones & electronic dictionaries are not. • Read ALL questions carefully BEFORE starting the exam, and answer ALL questions. • Write all answers in the space provided (use the backs of the pages for rough work). • SHOW YOUR WORK FOR ALL CALCULATIONS, or you will NOT get full marks. GOOD LUCK! PLEASE RAISE YOUR HAND IF YOU NEED CLARIFICATION. Please leave blank ID Number ______________________ Chem 205 Winter 2006 Final Exam Sections 03, 04 and 52 - page 2 Section I. The following 20 questions are multiple choice. They are worth 2 marks each. You may do rough work on your exam paper, but it will not be marked. You must mark your answers using a soft pencil on the machine readable answer form provided. Do not forget to mark your name and student number (your birth date is not required). 1. At 0 ° C, a bottle contains 325 mL of water in its liquid state. What is the volume of the water after it freezes (at 0 ° C)? The densities of liquid water and ice at 0 ° C are 1.000 g/mL and 0.917 g/mL, respectively. a. 27.0 mL b. 298 mL c. 325 mL d. 354 mL e. 391 mL Hint: Multiply 325 mL by the appropriate ratio of the densities. 2. Which of the following postulates of Dalton's atomic theory are now known to be INCORRECT? 1. Matter is made up of atoms. 2. All atoms of a given element are identical. 3. Atoms are indivisible and indestructible. a. 1 only b. 2 only c. 3 only d. 2 and 3 e. 1, 2, and 3 Hint: You need to have learned the answer(s) to this. 3. What is the identity the atom X in ? a. Hf b. Zr c. Rf d. Ge e. Cu Hint: You need to have learned what the subscript and superscript mean. 4. An average sample of coal contains 3.0% sulfur by mass. Calculate the moles of sulfur present in 2.40 × 10 3 kg of coal. a. 9.4 × 10 2 mol b. 2.2 × 10 3 mol c....
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This note was uploaded on 09/01/2008 for the course CHEM 205 taught by Professor Bird during the Spring '08 term at Concordia Canada.

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C205_final_w06_all_sections_hints - Course: CHEMISTRY...

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