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March 28, 2017

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1. Which of the following would occur as saturated hydrocarbons?

alkanes
alkenes
alkynes
cycloalkynes

ans: alkanes

2. There are millions of organic compounds but only thousands of inorganic compounds because

atoms of elements other than carbon never combine with themselves
organic compounds were formed by living things
carbon atoms can combine with up to four other atoms, including other carbon atoms
there is more carbon on the earth's surface that any other element.

ans: there is more carbon on the earth's surface that any other element

3. Propanol and iso-propanol have

the same physical and chemical properties
the same physical, but different chemical properties
different physcial, but the same chemical properties
different physical and chemical properties

ans: the same physical, but different chemical properties

4. What is ethanol converted into when wine "goes bad?"

CH3COOH
CH3OCH3
CH3CH2OH
CH3OH

ans: CH3COOH

5. when a solvent is cooled, it will dissolve

more solid
more gas
less gas
the same amount of solid or gas

ans: more gas

6. what would paint thinner, a petroleum distillate, most likely contain?

C2H4
C5H12
C17H34
C40H82

ans: C40H82

  • Chemistry please check - ,

    . Which of the following would occur as saturated hydrocarbons?

    alkanes
    alkenes
    alkynes
    cycloalkynes

    ans: alkanes right

    2. There are millions of organic compounds but only thousands of inorganic compounds because

    atoms of elements other than carbon never combine with themselves This isn't QUITE true. There are a few elements, such as S8, P4, Hg2Cl2, Al2Cl6, etc.
    organic compounds were formed by living things
    carbon atoms can combine with up to four other atoms, including other carbon atoms
    there is more carbon on the earth's surface that any other element. I'm not sure this last statement is true. There is more oxygen, as a percent, than any other element in the earths crust (49.5% by mass). In fact, carbon is 14th most abundant element in the earth's crust (0.08% by mass) so it doesn't even make the top 10. :-) The correct answer is that carbon can combine with up to four atoms including itself .......

    ans: there is more carbon on the earth's surface that any other element

    3. Propanol and iso-propanol have

    the same physical and chemical properties
    the same physical, but different chemical properties
    different physcial, but the same chemical properties
    different physical and chemical properties

    ans: the same physical, but different chemical properties
    I didn't look these up but you might. I would have picked different physical and chemical properties. Look up melting point and boiling point just for the fun of it. I'll bet they are different.

    4. What is ethanol converted into when wine "goes bad?"

    CH3COOH
    CH3OCH3
    CH3CH2OH
    CH3OH

    ans: CH3COOH right

    5. when a solvent is cooled, it will dissolve

    more solid
    more gas
    less gas
    the same amount of solid or gas

    ans: more gas right

    6. what would paint thinner, a petroleum distillate, most likely contain?

    C2H4
    C5H12
    C17H34
    C40H82

    ans: C40H82 My best guess, although I didn't look it up, is that C40H82 is a solid. C2H4 is a gas so your choices are between C5H12 and C17H34

  • Chemistry please check - ,

    Thanks!

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