Which of these phrases accurately describe disproportionation? Check all that apply. A single compound reacts with itself.

A single compound oxidizes and reduces a second compound.

A single compound is simultaneously oxidized and reduced.

A single compound is produced by the reaction of two ions.

A single compound acts as both the oxidizing agent and the reducing agent.

ANSWER: A, C,E on E2020

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

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.

How does climate change cause the ocean's thermohaline current to slow down?