5. (1 point) in which of the following compounds does rotation occur around all covalent bonds between carbons?

pentene
pentane right answer
octyne
octene

7. (1 point) which of the following compounds is a structural isomer of pentane?

2, 2-dimethylbutane
2-methylbutane right answer
2-dimethylpentane
octane

12. (1 point) which formula would go with the picture to represent the same compound? * picture goes with this

ch₃(ch₂)₂chooh
ch₃(ch₂)₂coch₂oh
ch₃(ch₂)₃cooh
ch₃(ch₂)₂cooh

18. (1 point) a saturated fat is saturated with

oxygens
water
hydrogens right answer
double bonds

21. (3 points) what are some of the by-products of burning coal? why does coal leave more soot upon burning than the other more aliphatic fuels obtained from petroleum?

22. (3 points) identify the compound above and classify its functional group:

23. (3 points) why do alcohols and carboxylic acids have a higher boiling point than hydrocarbons and halocarbons?