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Exam 1 Review: Scientific Method, Metric System, Conversions
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Exam 1 Review: Scientific Method, Metric System, Conversions

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@CompatibleBandoneon

Questions and Answers

What is the difference between a pure substance and a mixture?

  • Pure substances can be separated into their components while mixtures cannot
  • Pure substances are always liquids while mixtures can be solids, liquids, or gases
  • Pure substances have uniform composition while mixtures have variable composition (correct)
  • Pure substances contain only one type of atom while mixtures contain multiple types of atoms

    • Which scale measures temperature using the freezing and boiling points of water?

  • Rankine scale
  • Celsius scale (correct)
  • Fahrenheit scale
  • Kelvin scale

    • What is the definition of a calorie?

  • The amount of energy needed to cool 1 gram of water by 1 degree Celsius
  • The amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius (correct)
  • The amount of energy needed to raise the temperature of 1 kilogram of water by 1 degree Fahrenheit
  • The amount of energy needed to freeze 1 kilogram of water

    • What units are associated with gases in the density equation?

    <p>g/L</p> Signup and view all the answers

    Which group on the periodic table contains the alkali metals?

    <p>Group 1</p> Signup and view all the answers

    What is the key feature of dimensional analysis when performing unit conversions?

    <p>Maintaining the correct units through each step of the conversion</p> Signup and view all the answers

    What is the relationship between atomic mass and isotopes?

    <p>Atomic mass is the average weight of all the isotopes of an element.</p> Signup and view all the answers

    Which factor influences the atomic size trend on the periodic table?

    <p>Valence electrons</p> Signup and view all the answers

    How does metallic character change across a period in the periodic table?

    <p>Decreases</p> Signup and view all the answers

    What principle does the octet rule follow in chemical bonding?

    <p>Stable configuration with 8 valence electrons</p> Signup and view all the answers

    Which element property does electronegativity measure?

    <p>Tendency to attract electrons in a chemical bond</p> Signup and view all the answers

    When determining bond polarity, what does a nonpolar bond exhibit?

    <p>Equal sharing of electrons</p> Signup and view all the answers

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