What are the molarities and how do i solve for them?

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In preparing a standard calibration curve the following procedure is followed:

A solution of 0.100 M FeCIs in water is provided.

b. 20.00 ml of this 0.100 M FeCls solution is placed in a 500 mL volumetric flask and the solution is diluted to the mark with water (Labelled Stock Iron Solution).

c.

A solution of 0.500 M NaSCN in water is provided

d. 10.00 mL of this 0.500 M NaSCN solution is added to a 250 mL volumetric flask and the solution is diluted to the mark with water (Labelled Stock Thiocyanate Solution).

.

Five trials were undertaken using the following amounts of Stock Iron, Stock Thiocyanate and Water and the Absorbance values of these 5 solutions were collected.