Question

In an experiment the stoichiometry of potassium chlorate will beinvestigated to use the results to analyze a potassiumchlorate-potassium chloride mixture. Potassium chlorate is acompound containing the elements potassium, chlorine, and oxygen.When heated strongly, the compound decomposes and all oxygen can bedriven off. The potassium and chlorine remain as the productpotassium chloride, for which the formula is KCl. When a mixture ofpotassium chlorate and potassium chloride is heated, the mass lossdue to oxygen evolved from the potassium chlorate enables you tocalculate how much potassium chlorate was present in the originalmixture. To speed the rate at which the decomposition occurs,manganese dioxide is used as a catalyst. The mass of the manganesedioxide remains constant.

After the experiment is done, if you found the followingdata:
-the mass of the test tube plus catalyst
-the mass of the test tube and catalyst plus potassiumchlorate
-the mass of the test tube and catalyst plus potassium chlorideresidue
-the mass of oxygen lost
-the number of moles of oxygen atoms evolved
-the mass of potassium chloride (residue)
-the number of moles of potassium chloride

how would you find from this data:
-the number of moles of potassium atoms in the originalsample
-the number of moles of chloride atoms in the original sample
-the number of moles of oxygen atoms in the original sample


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