Chemistry, 11.12.2019 23:31 estefaniapenalo
State the relationship between electron configuration and location of an element in the period table
Answers: 2
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 07:00
What effect does a decrease in temperature have on the overall rate of a chemical reaction? a decrease in temperature decreases . the reaction rate will
Answers: 1
Chemistry, 22.06.2019 08:00
What are the similarities of physical and chemical change ?
Answers: 1
Chemistry, 22.06.2019 09:00
Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?
Answers: 2
State the relationship between electron configuration and location of an element in the period table...
Mathematics, 27.07.2021 07:40
Mathematics, 27.07.2021 07:40
Mathematics, 27.07.2021 07:40
Physics, 27.07.2021 07:40
Mathematics, 27.07.2021 07:40
History, 27.07.2021 07:40
Mathematics, 27.07.2021 07:40
Mathematics, 27.07.2021 07:40
Mathematics, 27.07.2021 07:40
Mathematics, 27.07.2021 07:50
Physics, 27.07.2021 07:50
Social Studies, 27.07.2021 07:50
Mathematics, 27.07.2021 07:50