During a coffee break, your friend spills coffee on your lab coat and the fabric is discovered. is this a true biological stain or simply a compound capable of imparting color?

[34 points awarded to the best answer, use facts and/or data] 1.) what's the likelihood of thunderstorms occurring in the state of maryland? {this question is for a project for science, use facts and/or data and explain why . 34 points to the best answer]