23. Macromolecules containing large amounts of hydroxyl groups (-OH) have less potential energy than molecules that are largely hydrocarbons, which of the following best explains why? a) Carbon – Hydrogen bonds are short and very strong
b) Carbon – Hydrogen bonds are long and comparatively weak
c) Oxygen – Hydrogen bonds are long and comparatively weak
d) Hydroxyl groups are easily removed in enzyme-catalyzed reactions

b) Carbon-Hydrogen bonds are long and comparatively weak

Explanation:

Carbon-Hydrogen bond is a covalent bond between a carbon and hydrogen atom in which carbon shares its valence electrons with four hydrogen atoms.

Carbon-Hydrogen bonds are long and carbon-hydrogen combine together to form several long chain organic comounds such as methyl, ethyl, isopropyl, and benzyl etcetera but are  comparatively weak.

Electronegativity affects the bond stregth of the hydrogen bond and there is small difference in electronegativities of the Carbon-Hydrogen that makes it comparatively weak.

Hence, the corrrect answer is "b) Carbon-Hydrogen bonds are long and comparatively weak".

youre right there are

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101