Chemistry, 14.08.2020 07:01 kromaug7986
Which statement best describes the research projects that are funded by private foundations
Answers: 3
Chemistry, 22.06.2019 05:30
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.
Answers: 1
Chemistry, 22.06.2019 23:00
What is the name of the enzyme that forms at the start of transcription?
Answers: 1
Chemistry, 22.06.2019 23:30
Rank substituents in order of their priority when assigning the e or z label to an alkene. i, ch2i , h, ch2ch2cl, f
Answers: 2
Which statement best describes the research projects that are funded by private foundations...
Health, 24.09.2019 22:10
History, 24.09.2019 22:10
English, 24.09.2019 22:10
Social Studies, 24.09.2019 22:10
Biology, 24.09.2019 22:10
Mathematics, 24.09.2019 22:20