A flask is filled with vapor by boiling a volatile unknown liquid in the foil covered flask. As it boils away, the vapor of the unknown pushes the air out of the flask through a tiny pinhole opening and eventually the flask is filled with an atmosphere composed exclusively of the unknown. When the flask is allowed to cool, the vapor condenses and air again refills the flask.
Q: If a drop of water clings to the outside of the foil cap and is not removed, how would the experimentally determined molecular weight be affected?? too high or too low?? explain.