Pract-MT1_3_key

8 the time allowed for this exam is 1 hour 18 minutes

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Unformatted text preview: aded and not those in your exam booklet. Extra time is NOT given to transfer your answers to the Scan Sheet. 7. Only approved calculators can be used – all other electronic devices are forbidden. 8. The time allowed for this exam is 1 hour, 18 minutes (78 total minutes). 9. At the end of the examination, you must hand in the Scan Sheet before leaving the room. You may keep the exam booklet unless taking an alternate or make ­up exam. Page 1 of 10 All questions are worth 5 points. Always give the best possible answer. 1. A block of a pure metal with a mass of 3.50 g is added to a graduated cylinder, which causes the water level to rise from 26.20 mL to 27.50 mL. Using table of densities below, which element could be the metal in the block? Metal Al Fe Ni Ti Zn Density (g/cm3) 2.70 7.86 8.91 4.50 7.14 a. b. c. d. e. Al Fe Ni Ti Zn 2. Which following measurement must have exactly four significant figures? a. 0.0250 b. 0.2500 c. 250.0 d. Both a and b e. Both b and c 3. How many significant figures does the result of this calculation contain? 15.55 m − 4.2 m 39.455 s + 63.98 s a. 2 b. 3 € c. 4 d. 5 e. None of the above 4. Determine which conversion factor(s) below is/are correct? a. 1 g/mL = 1 mg/mm3 b. 1 g/mL = 1 mg/cm3 c. 1 g/mL = 1 mg/m3 d. 1 g/mL = 1 kg/m3 e. More than one of the above Page 2 of 10 5. Which of the following terms best describes salt water? a. Homogenous solution b. Heterogeneous solution c. Pure compound d. Pure element e. None of the above 6. Which of the following measurements are identical? a. 1.25 m and 1.25x10–1...
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