Chemistry

Hey everyone I really need to bring my chemistry grade up can you help me with the following questions please

Which is a characteristic of alkanes?
 contain C = C

 general formula CnH2n

 saturated

 some isomers are cis and trans



_____________________________ ___________
Which fossil fuel, when combusted, emits minimal amounts of carbon monoxide, hydrocarbons, and particulates? In other words, which of these burns the "cleanest"?
 petroleum

 charcoal

 natural gas

 coal


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At current usage rates, world reserves of which fuel below are estimated to last for the least number of years?
 natural gas

 hydrogen

 petroleum

 coal



_____________________________ ___________
A compound containing seven carbon atoms is
 heptane

 octane

 hexane

 nonane



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The complete combustion of C8H18 yields

NOTE: The "8" and "18" are intended to be subscripts. The "2"'s are subscripts in the answer choices below.
 C2H2 and H2
 CO and H2O

 CO2 and H2O

 C and H2



_____________________________ ___________
An organic compound with an OH functional group is a(n)
 aldehyde

 ketone


 ether

 alcohol



_____________________________ ___________
The odor in many fruits is due to the presence of
 amines

 esters

 carboxylic acids

 alcohols



_____________________________ ___________
Which polymer occurs naturally?
 nylon

 dacron

 polycarbonates

 latex rubber



_____________________________ ___________
Polysytrene is a plastic that is noted for its use in
 plumbing pipes

 drinking cups

 clothing fabrics

 automobile paints


_____________________________ ___________
Which carboxylic acid is known as vinegar?
 butyric

 propionic

 acetic

 formic