Pre-AP Chemistry Midterm Assessment: Significant Figures
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Questions and Answers

What is the volume of the lead ball with a mass of 55.0 grams and a density of 11.4 g/cm3?

  • 4.82 L
  • 0.207 mL
  • 4.82 mL (correct)
  • 0.207 L

    • How many significant figures are in the number 0.027090?

  • 6
  • 5 (correct)
  • 7
  • 3

    • Which piece of glassware should be used when measuring a specific volume of liquid for a procedure?

  • Volumetric flask (correct)
  • Erlenmeyer flask
  • Graduated cylinder
  • Beaker

    • When rounding the number 2.348615 to 4 significant figures, what is the correct value?

    Signup and view all the answers

    Which of the following statements about matter is FALSE?

    <p>Matter can be converted into energy. (B)</p> Signup and view all the answers

    Which of the following is NOT a good laboratory practice?

    <p>Smelling and tasting chemicals (C)</p> Signup and view all the answers

    Which of the following statements about matter is NOT true?

    <p>Matter is smooth and continuous (B)</p> Signup and view all the answers

    Which state of matter has indefinite shape and is compressible?

    <p>gas (B)</p> Signup and view all the answers

    What is a pure substance?

    <p>composed of only one type of atom or molecule (D)</p> Signup and view all the answers

    Which of the following statements about matter is FALSE?

    <p>All of the above statements are true (D)</p> Signup and view all the answers

    If you hold a solid piece of pure gallium metal in your hand, and your body heat melts the gallium into its liquid form, this illustrates which of the following?

    <p>physical change (B)</p> Signup and view all the answers

    Which of the following is NOT a technique that could be used to separate a mixture into its components?

    <p>stirring (C)</p> Signup and view all the answers

    If a solid piece of shiny sodium metal is exposed to chlorine gas, a large amount of heat is released, and the white solid sodium chloride forms. Based on this information, which of the following statements is TRUE?

    <p>This process was exothermic (A)</p> Signup and view all the answers

    What is the value of 27°C on the Kelvin temperature scale?

    <p>300 (C)</p> Signup and view all the answers

    Which statement below is NOT consistent with the nuclear theory of the atom as proposed by Rutherford?

    <p>Most of the volume of an atom consists of empty space through which the electrons move. (A)</p> Signup and view all the answers

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