Passage II

Hydrocarbons contain carbon (C) and hydrogen (H) atoms joined by chemical bonds (which are represented in chemical notation by short straight lines). The carbon atoms are bonded to each other to form linear, branched, or cyclic structures (examples are presented in Table 1). The boiling points of these hydrocarbons were measured and listed in Table 2, and their densities (ratio of mass to volume) are listed in Table 3.

9. For each type of structure, what is the relationship between the number of carbon atoms to the boiling point and density? As the number of carbon atoms increases, the boiling point:

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Look at table 2, as the number of C atoms increases, the boiling point also increases;

Look at table 3, as the number of C atoms increases, the density increases