What is the concentration of a 450 mL solution that contains 200 grams of iron (II) chloride?

Moles = mass of solute/ gram molecular mass.
Solute is the 'stuff being disolved.
Solution is a homogeneous mixture of a solute in a
solvent

. moles of
solute

Molarity
is defined as: ____________________

. liters of
solution

In this problem (assuming the
values given are both to 3 significant figures)

. 200g
/ 127 g / mol 1.57
mol

Molarity =
___________________ = ________ = 3.50 M
FeCl2

. 450mL
* 1 L/1000ml 0.450 L

I
ALWAYS recommended to my students that they attach the chemical
formula (eg: FeCl2) as a subscript behind the unit of meaure symbol
(eg: M).