A winter skier made a hand warmer by placing 1.0 mol of sodium acetate, NaCH3CO2 (molar mass = 82.03 g/mol), in a plastic wrap pouch within a container of water. The skier then opened the plastic wrap pouch, allowing the sodium acetate to
mix with the water. This formed a 500 g solution with a temperature change of 27°C. What is the heat of solution given the
specific heat of water is 4.18 J/g.°C?
O A. 6.57 x 104 J/mol
O B. 1.12 x 10² J/mol
O C. 5.64 x 104J/mol
O D. 9.25 x 103 J/mol

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.

When a nucleus absorbs a neutron and then breaks apart, there are many products of the reaction. what is not a product of a nuclear fission reaction

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work