A) What is the percent composition of Freon, CCL2F2? B) the molar mass of a compound is approximately 122g the empirical formula is CH2O, what is the molecular formula of the compound? C) progesterone, a hormone, is made up of 80.2% carbon and 9.62% hydrogen, what is the empirical formula of progesterone? D) A 2.78 g sample if hydrated iron(II) sulfate, FeSO4 . X H2O, was heated to remove all of the water, the mass of the anhydrous compound was 1.52g. Calculate the number of water molecules associated with each molecule? (what is X?) E) Iron metal reacts with oxygen to form iron (III) Oxide, how many grams of oxygen is required to react with 0.400 mol of iron?

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