Scout Ahead https://www.scoutahead.org/plans/chemistry-merit-badge/questions

Which of this applies to you?

Answering these takes the parts that are not for you out of Chemistry Merit Badge. Nothing is required, nothing is kept on the server, and nothing is ever hidden because a question went unanswered. A step that might apply to you stays on the list and is marked.

Requirement 4: which two?

The badge asks for TWO of the four. Two of them need your counselor or an approved adult present, so if that is hard to arrange the other two are the pair to pick.

Requirement 8: a visit, or the careers research?

One of three. Two of them need somewhere to go and someone to talk to; the third can be done from where you are sitting.