Chemistry, 13.07.2019 16:30 cbbentonam72
Which information would be most useful to construct a model of the populations of a predator species and prey species in an area? a. the average population size, survival rate, and amount of genetic variation of each species b. the initial population size, reproduction rate, and survival rate of each species c. the initial population size, reproduction rate, and amount of genetic variation of each species d. the average population size, birth rate, and death rate of each species
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Chemistry, 21.06.2019 12:30
Type the correct answer in the box. spell all words correctly .what does biodiesel produce in higher amounts? biodiesel produces higher amounts
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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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Which information would be most useful to construct a model of the populations of a predator species...
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