Determine the molar mass of iron(II) chloride hexahydrate. Provide an answer to two decimal places.

FeCl₂ · 6H₂O = 234.75 g/mol

Explanation:

Iron (II) = Fe²⁺

Number between () indicates the oxidation state

Chloride = Cl⁻

Iron (II) chloride = FeCl₂

If we say hexahydrate, it means that our salt is hydrated by 6 molecules of water.

FeCl₂ · 6H₂O = Iron(II) chloride hexahydrate

Molar mass is = 55.85 g/mol + 35.45 g/mol . 2 + 6 . 18g/mol  = 234.75 g/mol

We have just summed molar mass of Fe, plus Cl (x2), plus 6 H₂O

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4d^55s^1 ( third choice)