Chemistry - Semester 1 - Practice Final

14 Questions | Total Attempts: 6929

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Chemistry - Semester 1 - Practice Final

Chemistry Final. Mrs. O'Gorman. Semester 1. 2010.


Questions and Answers
  • 1. 
    The sate of matter for an object that has definite shape and definite volume is
    • A. 

      Solid

    • B. 

      Liquid

    • C. 

      Gaseous

    • D. 

      Mixed

    • E. 

      Elemental

  • 2. 
    Which of the following involved a chemical change?
    • A. 

      Digesting food

    • B. 

      Melting ice

    • C. 

      Boiling water

    • D. 

      Chopping wood

    • E. 

      None of the above

  • 3. 
    A sample of an element contains only one kind of
    • A. 

      Pure substance

    • B. 

      Mixture

    • C. 

      Isotope

    • D. 

      Atom

    • E. 

      None of the above

  • 4. 
    A pure substance made up of more than one kind of atom is called
    • A. 

      An element

    • B. 

      A compound

    • C. 

      A heterogenous mixture

    • D. 

      A homogenous mixture

    • E. 

      An alloy

  • 5. 
    In a chemical change
    • A. 

      A phase change must occur

    • B. 

      A phase change never occurs

    • C. 

      The original material can never be regenerated

    • D. 

      The products are different substances from the starting materials

  • 6. 
    Which of these is a chemical property?
    • A. 

      Helium is a gas

    • B. 

      Water has a high specific heat

    • C. 

      Water boils at 100ÂȘC

    • D. 

      Neon is very nonreactive

    • E. 

      Potassium is a soft, shiny metal.

  • 7. 
    The symbol, Ca+1 can be used to represent
    • A. 

      A calcium ion

    • B. 

      A krypton ion

    • C. 

      Potassium

    • D. 

      A potassium atom

    • E. 

      A krypton atom

  • 8. 
    In chemistry, a formula is used to represent
    • A. 

      An element

    • B. 

      An atom

    • C. 

      A compound

    • D. 

      All the above

    • E. 

      None of the above

  • 9. 
    How many oxygen atoms are indicated in the formula Ca3(PO4)2?
    • A. 

      6

    • B. 

      4

    • C. 

      13

    • D. 

      8

    • E. 

      None of the above

  • 10. 
    The total number of atoms indicated by the formula Fe2(SO4)3 is
    • A. 

      5

    • B. 

      7

    • C. 

      19

    • D. 

      10

    • E. 

      17

  • 11. 
    The chemical formula Fe2(SO3)3 indicates
    • A. 

      Three atoms of iron and three atoms of Sulfur

    • B. 

      Six atoms of each element

    • C. 

      Six atoms of oxygen

    • D. 

      Two atoms of iron, three atoms of oxygen, one atom of sulfur

    • E. 

      None of the above

  • 12. 
    How many protons, electrons, and neutrons respectively does 235U have?
    • A. 

      92, 143, 235

    • B. 

      92, 92, 143

    • C. 

      92, 92, 235

    • D. 

      74, 53, 235

    • E. 

      74, 92, 235

  • 13. 
    Atoms of the same element having the same atomic number but different mass numbers are called
    • A. 

      Orbitals

    • B. 

      Isotopes

    • C. 

      Neutrons

    • D. 

      Isomers

    • E. 

      Nuclei

  • 14. 
    An element's most stable ion forms an ionic compound with chlorine having the formula XCl2. If the ion of element X has a mass of 34 and 18 electrons, what is the identity of the element, and how many neutrons does it have?
    • A. 

      Ar, 16 neutrons

    • B. 

      Ca, 14 neutrons

    • C. 

      Ar, 18 neutrons

    • D. 

      S, 18 neutrons

    • E. 

      K, 20 neutrons

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