In the video, the experimenter used a model to represent a phenomenon observed in the natural world. What did the light and each of the flasks represent in this model?

The light represented the Sun, and each of the flasks represented the atmosphere, but with different compositions. One flask had a higher carbon dioxide concentration than the other.

Explanation:

b is the correct

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.