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# Salts and Their Reactions

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7. When 1.00 grams of chromium metal is heated in excess iodine, 8.301 rams of chromium iodide salt is formed. Calculate the empirical formula of this salt.

8. When a calcium carbonate tablet is ingested, it dissolves by the reaction of stomach acid, which contains hydrochloric acid. The unbalanced equation for this reaction is CaCO3(s) + HCl(aq) ---> CaCl2(aq) + H2O(l) + CO2(g). How many calcium carbonate tablets, each containing 500 mg of the active ingredients are required to react with 37.0 grams of stomach acid containing 49.5% HCl by mass?

9. The formula for thionyl chloride is SOCl2. This compound is a very powerful drying agent in the synthetic chemistry industry in that it reacts completely with water according to the following unbalanced equation: SOCl2(l) + H2O(l) ---> SO2(g) + HCl(g). How many grams of thionyl chloride remove 305.0 grams of water?

10. 637 atoms of a particular isotope weigh 2.2483 x 10^-19 grams. What is the atomic mass of the isotope?