You and a classmate were each given a yellow unknown with a melting point of 110 degrees celsius. you both ran a tlc on it using ethyl acetate solvent as the mobile phase. you both observed a single spot with an rf value of 0.45. you think you might have the same unknown, but you want to make sure. what two relatively quick and easy lab procedures could you do to determine if you have the same unknown?

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.

What conflict ended the false doctrine of "states rights"

Identify a true statement about media multiplexity.the choice of medium is primarily important in determining the strength of relationships.weak ties are uncomplicated and do not need many channels to sustain them.tie strength plays an insignificant role in determining the number of media employed by pairs.strong ties require less media than weak ties to orchestrate their varied and interdependent connection.