Which of the following is considered a compound?

1) N2
2) Na
3) BF3

1. list three scientific reasons cockroaches may fly.

Ineed ! i have no clue how to do this problem.

Draw any one of the skeletal structures of a 2° alkyl bromide having the molecular formula of c6h13br and two stereogenic centers. indicate chirality by using wedge and hashed wedge notation. lone pairs do not need to be shown.