Chemistry, 22.11.2019 03:31 raconteuraki
Read information about the west nile virus and its effect on the bird population in the state you live in. if your state has not been affected yet, choose another state that has. in your state, how many birds have tested positive for west nile virus? estimate what percentage of the total resident bird population this number represents
Answers: 1
Chemistry, 22.06.2019 04:00
How do scientists think that gravity affected the formation of our solar system?
Answers: 1
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, 23.06.2019 00:40
To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.
Answers: 1
Read information about the west nile virus and its effect on the bird population in the state you li...
English, 09.11.2020 14:00
Mathematics, 09.11.2020 14:00
Mathematics, 09.11.2020 14:00
History, 09.11.2020 14:00
Arts, 09.11.2020 14:00
Chemistry, 09.11.2020 14:00
Mathematics, 09.11.2020 14:00
Mathematics, 09.11.2020 14:00
French, 09.11.2020 14:00
English, 09.11.2020 14:00
Spanish, 09.11.2020 14:00
Business, 09.11.2020 14:00