General Chemistry Units and Conversion Factors Quiz
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Questions and Answers

What is the correct approach to convert between units of measurement?

  • Multiply the given quantity by a conversion factor that cancels the initial unit and leaves the desired unit (correct)
  • Add a conversion factor to the given quantity that cancels the initial unit and leaves the desired unit
  • Subtract a conversion factor from the given quantity that cancels the initial unit and leaves the desired unit
  • Divide the given quantity by a conversion factor that cancels the initial unit and leaves the desired unit

    • In the example of converting the height of Angel Falls from miles to kilometers, why was the conversion factor with kilometers in the numerator used?

  • To cancel out the miles unit and leave the kilometers unit (correct)
  • To cancel out the kilometers unit and leave the miles unit
  • Because kilometers are smaller than miles, a smaller conversion factor is needed
  • Because kilometers are larger than miles, a larger conversion factor is needed

    • If a quantity is given in a larger unit and needs to be converted to a smaller unit, what will happen to the numerical value?

  • The numerical value will remain the same
  • The numerical value will increase (correct)
  • The numerical value will decrease
  • The numerical value may increase or decrease, depending on the specific units

    • In the example of converting the length from centimeters to inches, what are the equivalent quantities needed to construct the conversion factor?

    <p>1 in = 2.54 cm</p> Signup and view all the answers

    Which of the following is an example of a physical change?

    <p>Melting ice into water</p> Signup and view all the answers

    What is the measured quantity in the given example of buying speaker wire?

    <p>Both length of the wire and price per foot</p> Signup and view all the answers

    What is the importance of including units in all calculations?

    <p>To minimize errors in calculations</p> Signup and view all the answers

    Which of the following is true about conversion factors?

    <p>Conversion factors are ratios used to convert units in calculations</p> Signup and view all the answers

    If a car travels at 60 miles per hour, how many feet does it cover in an hour? (1 mile = 5280 feet)

    <p>$60 \times 5280$ feet</p> Signup and view all the answers

    What is the purpose of using equivalent quantities to construct conversion factors?

    <p>To simplify converting measured quantities between different units</p> Signup and view all the answers

    In chemistry, what do measured quantities consist of?

    <p>A number and a unit</p> Signup and view all the answers

    Why should a person's height be expressed as '6 feet' instead of just '6'?

    <p>To provide a complete representation including the unit</p> Signup and view all the answers

    What is the primary focus of the study of chemistry?

    <p>The properties of matter and the changes it undergoes</p> Signup and view all the answers

    Which of the following is an example of a physical property?

    <p>The melting point of water</p> Signup and view all the answers

    What is the difference between a physical change and a chemical change?

    <p>A physical change involves a change in physical properties, while a chemical change involves a change in chemical properties</p> Signup and view all the answers

    Which of the following is a measured quantity in chemistry?

    <p>All of the above</p> Signup and view all the answers

    What is the importance of units and conversion factors in chemistry calculations?

    <p>All of the above</p> Signup and view all the answers

    Which of the following is an example of a problem-solving approach in chemistry?

    <p>All of the above</p> Signup and view all the answers

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