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Stations & Extras - Unit 3 Exam Review

Quiz by Chris Young

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25 questions
Show answers
  • Q1
    What is the correct formula for iron (III) phosphate?
    Fe3P2
    FeP
    FePO4
    Fe3(PO4)2
    30s
  • Q2
    The bond between Br atoms in a Br2 molecule is...
    covalent and is formed by the transfer of two valence electrons
    covalent and is formed by the sharing of two valence electrons
    ionic and is formed by the sharing of two valence electrons
    ionic and is formed by the transfer of two valence electrons
    30s
  • Q3
    The gram-formula mass of H2O is 18 grams/mole. How was this determined?
    H2O is a liquid at 18 degrees, so it's 18.
    Actually it's 17 grams/mole!
    The atomic mass of H is 1, and of O is 16. So 2 x(1) + 16 = 18
    H2O has 3 ions, and three times 6 = 18.
    30s
  • Q4
    Which change occurs when a barium atom loses two electrons?
    It becomes a positive ion and its radius decreases.
    It becomes a positive ion and its radius increases.
    It becomes a negative ion and its radius increases.
    It becomes a negative ion and its radius decreases.
    30s
  • Q5
    Which substance is an ionic compound?
    Question Image
    D
    A
    B
    C
    30s
  • Q6
    How many electrons are contained in an Au3+ ion?
    79
    76
    82
    197
    30s
  • Q7
    Which electrons are represented by all of the dots in the diagram shown?
    Question Image
    the carbon and hydrogen valence electrons
    all of the carbon and hydrogen electrons
    the carbon valence electrons, only
    the hydrogen valence electrons, only
    30s
  • Q8
    Which compound contains both ionic and covalent bonds?
    CH2O
    PCl3
    CaCO3
    MgF2
    30s
  • Q9
    A substance that does not conduct electricity as a solid, but does conduct electricity when melted is most likely classified as…
    molecular
    ionic
    metal
    nonmetal
    30s
  • Q10
    An unknown element X can form a compound with the formula XBr3. In which group on the Periodic Table would element X be found?
    group 18
    group 13
    group 15
    group 1
    30s
  • Q11
    Which equation shows a conservation of mass?
    PCl5 --> PCl3 + Cl2
    Al + Br2 --> AlBr3
    Na + Cl2 --> NaCl
    H2O --> H2 + O2
    30s
  • Q12
    Which substance has a chemical formula with the same ratio of metal ions to nonmetal ions as in potassium sulfide?
    sodium oxide
    magnesium oxide
    sodium chloride
    magnesium chloride
    30s
  • Q13
    What is the total number of moles in 80.0 grams of C2H5Cl (that's chlorine at the end of the formula)
    0.81 moles
    1.00 moles
    1.24 moles
    2.00 moles
    30s
  • Q14
    What property is NOT associated with covalent compounds?
    low melting point
    soft
    brittle
    poor conductor when dissolved in water
    30s
  • Q15
    2H2 + O2 --> 2H2O If you use 8 grams of hydrogen to produce 72 grams of H2O, how much O2 is needed?
    16 g O2
    80 g O2
    64 g O2
    56 g O2
    30s

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