Calculate the % composition OF EACH ELEMENT in the following:
1) CoF3
2) 2Fe2O3
3) Al(C2H3O2)3
4) 2Na2Al2(SO4)4

5) Which one of the following has a lower percentage of mercury? Mercury (I) Sulfate or Mercury (II) Hydride?

6) You are the CEO of a fertilizer company. You have to decide if you want to use NH4 or NH3 in your fertilizers. Both fertilizers work equally well. You are only concerned about the price of purchasing nitrogen. Which type of fertilizer should you make and why?
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