A água oxigenada é uma solução que contém a substância peróxido de hidrogênio. Ela é usada como bactericida. Quando aplicamos a água oxigenada em um ferimento, podemos observar a intensa formação de bolhas. Isso ocorre porque temos uma enzima chamada catalase. Ela não participa da reação química, mas leva a rápida reação de decomposição do peróxido de hidrogênio em água e em gás oxigênio. Escreva a equação química que representa a transformação descrita no texto

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

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.