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.

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

For a patient with the following pes statement and interventions, which would be the most appropriate monitoring and evaluating data? pes statement: inadequate calcium intake related to food and nutrition related knowledge deficit as evidenced by statements that the only dietary source of calcium is milk and she believes that she is lactose intolerant. patient’s nutrition prescription is for a diet providing 1200 mg calcium per day. patient was provided with in-depth nutrition education on alternative dietary and supplement sources of calcium. a. calcium intake (at subsequent visit) b. knowledge assessment by asking patient to identify food sources from menus and shopping list (at the end of the current visit) c. serum calcium (at next visit) d. both a and b e. both a and c

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion