How does an inclined plane make loading a heavy crate onto a truck easier than lifting the crate? a. it reduces the weight of the crate. b. it reduces the distance you move the crate. c. it reduces the force you exert on the crate. d. it reduces the amount of work done on the crate.

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.