1)

pentane orn-pentaneStarted off a bit easy, right?

2)

2,2-dimethylbutaneNow, don't let the condensed form fool you!

3)

2,2,3-trimethylhexaneNotice the longest chain is not the horizontal one!

4)

2,4,4-trimethylhexaneOnce again, the longest chain is not the horizontal one, and the name is not 3,3,5-trimethylhexane because we want the smallest combination of numbers (2+4+4=10 which is less than 3+3+5=11).

5)

4-methylnonaneTry not to let the way a molecule is drawn fool you! Always look for the longest chain!

6)

2,3-dimethylhexaneAnother tricky one!

7)

2-methyl-5-isopropyloctaneor5-(1-methylethyl)-2-methyloctaneDid you remember those special branches? Also, alphabetical order ignores prefixes like "iso".

8)

5-isobutyl-4-methylnonaneor5-(2-methylpropyl)-4-methylnonaneIsobutane is another one of those special branches!

9)

5-t-butyl-4-ethyl-2,6,7,9-tetramethyldecaneor4-ethyl-2,6,7,9-tetramethyl-5-(1,1-dimethylethyl)decaneThis one was fun, wasn't it? Notice the name isn't 6-t-butyl-7-ethyl-2,4,5,9-tetramethyldecane because it doesn't have the smallest combination of numbers (6+7+2+4+5+9=34 > 5+4+2+6+7+9=33).

10)

4-ethyl-2,3-dimethyl-5-propyloctaneRemember, alphabetical order ignoring prefixes like "di". Also, did you notice how two ways to number gave exactly the same name?