You have a standard solution of 1.677 M lead.
You quantitatively dilute 5.00 ml of this solution into a 100 ml volumetric flask.
AES analysis of this diluted solution finds a voltage of 102.3 mv.
You then take an unknown solution of lead, and dilute 5.00 ml to 50 ml in a volumetric flask,
and record a signal of 321.2 mv. What is the concentration of lead in this unknown?