Chemistry, 01.03.2021 22:00 coontcakes
The solubility of sodium acetate is 46 g per 100 g H20 at
20°C and 170 g per 100 g H20 at 100°C. A solution is
prepared by adding 112 g of sodium acetate to 100g of water at
25°C, heating the solution to 100°C and cooling back to 20°C.
How much will recrystallize when a seed crystal is added?
Answers: 1
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 05:20
Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally
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
The solubility of sodium acetate is 46 g per 100 g H20 at
20°C and 170 g per 100 g H20 at 100°C. A...
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