What is the molar concentration of an aqueous solution that has 200g of Iron (II) Chloride dissolved in 450mL of water? (convert to moles then solve for Molarity)

We are given:

200 grams of FeCl₂ in 450 mL of water

Number of Moles of FeCl₂ in 450 mL:

Molar mass of FeCl₂ = 127 grams/mol (approx)

Number of moles = Given mass / molar mass

replacing the variables

Number of moles = 200 / 127

Number of moles = 1.57 moles

Number of Moles of FeCl₂ in 1 L (Molarity):

We know that in 450 mL of the solution, we have 1.57 moles

Molarity of the solution = Number of moles / Volume of solution (in L)

Molarity of the solution = 1.57 / 0.45

Molarity of the solution = 3.489 M

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