Question

question 1 (10 points)
what is the iupac name of this compound?
4 - isopentylnonane
3 - ethyl - 4 - propylnonane
3,3 - dimethyl - 4 - propylnonane
3,3 - dimethyl - 4 - butylnonane
3 - ethyl - 4 - butylnonane
question 2 (10 points)
which has the highest boiling point?
natural gas (composed mostly of ch4)
gasoline (composed mostly of c5h12 - c12h26)
kerosene (composed mostly of c12h26 - c16h34)
diesel fuel (composed mostly of c15h32 - c18h38)
all of these are petroleum products, so all have the same boiling point.

Explanation:

Question 1:

1. First, identify the longest carbon - chain. The longest chain has 9 carbon atoms (nonane).
2. Then, name the substituents. There are two methyl groups on the 3 - carbon and a propyl group on the 4 - carbon. So the IUPAC name is 3,3 - dimethyl - 4 - propylnonane.

Question 2:

Boiling point increases with increasing molecular weight and number of carbon atoms in hydrocarbons. Diesel fuel has the largest range of carbon - chain lengths among the given options, so it has the highest boiling point.

Answer:

Question 1: C. 3,3 - dimethyl - 4 - propylnonane

Question 2: D. diesel fuel (composed mostly of C₁₅H₃₂ - C₁₈H₃₈)