A pitcher for a professional baseball team allows runs in the first nine games he starts this season. Let A be the set of the number of runs allowed by the pitcher in his first nine starts. In the tenth game he starts, he allows 9 runs. Let B represent the set of the number of runs allowed in all ten games he has started. Select the true statements. The median of A is the same as the median of B. The interquartile range of B is greater than the interquartile range of A. Including the runs allowed in the tenth game does not cause the spread of the data to change. The median of B is 1 run more than the median of A. The interquartile range of A is 1 less than the interquartile range of B.

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.