PracticeExam1b

PracticeExam1b - Tufts University Chem 1 Summer 2008...

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Tufts University Chem 1 Summer 2008 Practice Exam 1b I. Multiple choice questions (select one correct answer to each question) 1. Which of the following is an element: (a) water (b) graphite (c) table salt (d) coffee (e) none of the above 2. One mole of H 2 SO 4 contains (a) one atom of oxygen (b) two atoms of hydrogen (c) about one gram of sulfur (d) about two grams of hydrogen 3. Which of the following is the correct formula of iron(II) carbonate: (a) Fe 2 C (b) Fe 2 CO 3 (c) FeCO 3 (d) Fe(HCO 2 ) 3 (e) Fe 2 HCO 2 4. O 2 (g) and O 3 (g) are (a) isotopes (b) ions (c) forms of elemental oxygen (d) acids (e) ionic compounds 5. An 33 S 2- particle has (a) 2 electrons (b) 16 neutrons (c) 35 electrons (d) 17 neutrons (e) 14 protons 6. Mass number of an atom that has 35 protons and 46 neutrons is (a) 35 (b) 46 (c) 81 (d) 79.904 (e) 11 1
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7. A speed of 50.0 m/s equals to (a) 5.00x10 -2 km/s (b) 0.833 m/h (c) 5.00x10 4 km/h (d) 1.39x10 -3 m/h (e) 3.00x10 3 cm/min 8. The temperature 300. K is the same as (a) 1064°F (b) 106°F (c) 80.°F (d) -3°F 9. The molecular mass of aluminum sulfate rounded to the whole numbers is
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PracticeExam1b - Tufts University Chem 1 Summer 2008...

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