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    Alkane formula, endothermic reactions, and calculating volume

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    Question 26
    The general formula of an alkane is:
    CnH2n
    CnH2n+2
    CnH2n-2
    CnH2n+4
    CnH2n-4

    Question 27
    Endothermic reactions cause the surroundings to
    cool down
    heat up
    become acidic
    increase electromagnetic radiation

    Question 28
    In the compound 2-iodo-4-nitromethane, iodine is attached to the second carbon and nitrite is attached to the fourth carbon.
    True
    False

    Question 29
    The density of lead is 11.4 g/cm3 at 25C. Calculate the volume occupied by 25.0 g of lead.
    2.19 cm3
    0.456 cm3
    285 cm3
    1.24 cm3
    6.05 cm3

    Question 30
    The elements in Group 7A are known by what name?
    transition metals
    halogens
    alkali metals
    alkaline earth metals

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    Solution Preview

    26) CnH2n+2

    27) cool down
    Because the system absorbs heat from the surroundings.

    28) ...

    Solution Summary

    This solution provides an answer to each question along with a brief explanation and/or calculation for each problem where necessary.

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