At 298 K, H = -1652 kJ/mol and S = 0.097 kJ/(K•mol). What is the Gibbs free energy of the reaction? A.-1681 kJ
B. 67,000 kJ
C. 225 kJ
D. -745 kJ

Complete this brønsted-lowry reaction placing each product by its appropriate label. hso4- + hcn

What is the formula that this ionic compounds could form sr2+p3-o2-

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.