Chemistry worksheet focusing on naming alkanes, including identifying carbon chains, naming hydrocarbons, drawing structural formulas, and correcting naming errors.

1. a. 6 carbons, hexane
b. 8 carbons, octane
c. 7 carbons, heptane
d. 9 carbons, nonane

2. a. 3-methylhexane
b. 4-ethyloctane
c. 3-ethylheptane
d. 2-methylhexane
e. 3-propylheptane
f. 3-ethylhexane

3. a. CH₃CH₂CH(CH₃)CH₂CH₂CH₃
b. CH₃CH₂CH₂CH(CH₂CH₃)CH₂CH₃
c. CH₃CH(CH₃)CH₂CH₂CH₃
d. CH₃CH₂CH₂CH(CH₂CH₂CH₃)CH₂CH₂CH₂CH₂CH₃
e. CH₃CH₂CH(CH₂CH₃)CH₂CH₂CH₂CH₂CH₃
f. CH₃(CH₂)₄CH(CH₂CH₂CH₃)CH₂CH₂CH₃

4. a. The longest chain is 7 carbons, so it should be 2-methylheptane.
b. Ethyl group cannot be on carbon 1; the longest chain is 5 carbons, so it should be pentane.
c. The longest chain is 4 carbons, so it should be 2-methylbutane.
d. The structure shown is 2-methylpropane, not a valid 5-carbon chain with a methyl group.