Two compounds both have the chemical formula C5H12 yet physi

Two compounds both have the chemical formula C_5H_12, yet physical chemists can separate them based on their boiling points, which are different. Are these two C_5H_12 compounds likely to have the same structure or different structures? If a molecule (such as butane) lacks a functional group, is It possible for a biological system to use it in a polymer? Why or why not? Describe each of the following functional groups as polar, negatively charged, or positively charged: Amino Hydroxyl Carboxyl After discovering a new species of arctic char, a type of fish, scientists examining the phospholipids in its cell membrane found that most consisted of unsaturated fatty acids. If you were to examine a purified sample of fatty acids from this new species of char, do you expect it to be solid or liquid at room temperature? Explain. The backbone of lauric acid, a fatty acid in coconut oil, is 12 carbon atoms long. The backbone of stearic acid is 18 carbon atoms long. Which of the two do you expect has more stored energy in it? Why? What functional group on fatty acids allow them to be linked together in a triglyceride? What molecule do animals use to store their carbohydrates, and where is it made? What molecule do plants use to store their carbohydrates for energy use? What carbohydrate molecule do plants use for structural support? Are the monomers of these three molecules the same or different?

Solution

(1) these two compounds with same formula (C5H12) have different structures, which is the reason why their boiling points differ. For example N-form has higher boiling point than iso-form of the same compound due to weak van der waal forces of interaction.

(2) No, without the functional group it is not possible to form a polymer since enzymes in the biological systems ligate/condense functional groups to form polymer.

(3)

Amino group is polar and positively charged

Hydroxyl group is polar uncharged