A student performs a redox titration to determine the percent by mass of chlorate in an allergy tablet. The chlorate is titrated with iodide ions until the end point. The student reported that 29.50 mL of 0.100 M KI solution was required to reach the end point of a titration when 10 allergy tablets containing chlorate as the main active ingredient are dissolved in 25.00 mL of distilled water. What mass in grams of chlorate is present in the 10 allergy tablets? Use the Balanced chemical equation to answer the question.
6, 1, 6, 3, 1, 3

Hint: this is a net ionic equation, so spectator ions have been removed!

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

it is stable as it is in group 0 which have full outer shells of electrons

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.