Multiple choice The hydrocarbons containing 5 -16 carbon atoms are ____. gases liquids solids none of these Reveal answer Fill a bubble to check yourself B Correct answer Explanation Hydrocarbons with 5-16 carbon atoms (pentane to hexadecane range) are liquids at room temperature. They have sufficient molecular weight and intermolecular forces to exist as liquids, unlike smaller alkanes (gases) or much larger ones (solids).