Chemistry, 16.11.2020 21:40 samariahopkins4
6. Suppose someone brought you a sample of pond water containing an unknown species of microorganism. How could you use the microscopes from this activity to determine: a) whether the species can swim, and b) whether the species is a prokaryote or eukaryote?
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Chemistry, 22.06.2019 04:30
In which phase(s) do the molecules take the shape of the container?
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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.
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Chemistry, 22.06.2019 05:50
What are transitions between a liquid and a solid called? identify which way they are transitioning
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Chemistry, 22.06.2019 07:30
Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.
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6. Suppose someone brought you a sample of pond water containing an unknown species of microorganism...
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