The single-charge difference would result in a difference in mobility in a normal experiment (which separates chains based on size), but would make a detectable difference in pI.

well off of my head we know that the perfume bottle is most likely opened, or broken. i can also tell it is moving at low and high concentration because it is covering the other side of the room. what we can obtain from this information is it explains why the odor can be detected at the other side of the room.

idk i’m struggling too

i think it is true since you can test the answer and can use observations to complete it.