You receive an annual report of the results of your city's tap water testing. The report shows that there are small amounts (a fraction of a milligram per liter) of a water-soluble chemical called dichloroethene present. You want to determine whether this is a toxic chemical. Describe a study that could be conducted to measure its toxicity. Draw a sample dose-response graph for mortality that includes a threshold dose and LD50. Make sure you label each axis.

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the answer is definitely c.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.