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    Multiple Choice Questions

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    6 ) Iron has a density of 7.86 g/cm3. The volume occupied by 55.85 g of iron is:

    7 ) Which pair of elements would be most likely to form an ionic compound?
    P and Br
    Cu and K
    C and O
    O and Zn
    Al and Rb

    8 ) Which is the formula for the binary compound of potassium and nitrogen?
    KN
    K2N
    NK2
    K3N
    NK3

    9) On the average an atom of uranium (U) is approximately how many times heavier than an atom of potassium?
    6.1 times
    4.8 times
    2.4 times
    12.5 times
    7.7 times

    10
    How many protons and electrons are present in a Br– ion?
    35 p, 35 e
    80 p, 81 e
    35 p, 34 e
    35 p, 36 e
    80 p, 34 e

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    Solution Preview

    6) Iron has a density of 7.86 g/cm3. The volume occupied by 55.85 g of iron is:

    Density = Mass / Volume

    7.86 g/cm3 = (55.85 g) / Volume
    or Volume = (55.85 g) / (7.86 g/cm3) = 7.10 cm3

    Answer: Volume = 7.10 cm3

    7) Which pair of elements would be most likely to form an ionic compound?
    P and Br
    Cu and K
    C and O
    O and Zn
    Al and Rb

    Answer: O and Zn

    When the electro negativity of two bonded atoms differ greatly the ...

    Solution Summary

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