Select all of the answers that apply.
if you have respiratory or heart problems,
can ma...
Chemistry, 10.09.2019 21:30 OliTepley8032
Select all of the answers that apply.
if you have respiratory or heart problems,
can make it worse.
n carbon monoxide
oxygen
nitrogen
sulfur oxide
nitrogen oxide
Answers: 1
Chemistry, 21.06.2019 22:30
Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail
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 06:40
Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine
Answers: 1
Mathematics, 09.05.2021 21:00
Mathematics, 09.05.2021 21:00
Health, 09.05.2021 21:00
Mathematics, 09.05.2021 21:00
Mathematics, 09.05.2021 21:00
Mathematics, 09.05.2021 21:00
Mathematics, 09.05.2021 21:00
Physics, 09.05.2021 21:00
Chemistry, 09.05.2021 21:00
Chemistry, 09.05.2021 21:00
History, 09.05.2021 21:00