# Measuring the size of a molecule

by ecy5maa
Tags: measuring, molecule, size
 P: 30 Hi, 1. The problem statement, all variables and given/known data I am trying to determine the size of a molecule..by doing the oil drop experiment where we drop a tiny droplet of oil on water covered with a thin layer of powder...and then make calculations based on the diameter of the circle... the droplet forms in oil. 3. The attempt at a solution However, the oil droplet for me is not making a circle..rather is spreading out irregularly. How can I fix this. Everything i have used is according to this site: http://www.practicalphysics.org/go/Experiment_633.html but i have used talcum powder instead of lycopodeum powder