Chemistry, 03.02.2021 19:40, arodavoarodavo
Give the ion symbol for the ion that has 27 protons and 24 electrons.
Answers: 3
Chemistry, 21.06.2019 14:30, antoninapride
Which statement justifies that phosphine (ph3) is a polar molecule?
Answers: 1
Chemistry, 22.06.2019 05:30, MansellS5529
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 07:10, nasrul3725
Remember to use the proper number of significant figures and leading zeros in all calculations. gelatin has a density of 1.27 g/cmÂł. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4
Answers: 3
Give the ion symbol for the ion that has 27 protons and 24 electrons....
Mathematics, 24.09.2019 08:11
Mathematics, 24.09.2019 08:11
Mathematics, 24.09.2019 08:11
Mathematics, 24.09.2019 08:11
Mathematics, 24.09.2019 08:11