Tom’s hand print is 30 cm2 but Sean’s handprint is only 20 cm2. If Tom is able to push with a force of 70 N and Sean can push with a force of 50 N, who can exert a larger pressure on an object?

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.