[RobJim]

Concentration is in moles per liter. You know the moles, you know the volume in mL. Change the mL to liters (=0.1 L) and then divide the moles by the liters. For example:

Concentration of Cu = (0.00236 mol)/(0.1 L) = 0.0236 mol/L = 0.0236 M