Chemistry, 10.02.2021 07:10 orcawave9408
I have 50.0 g of ethanol (C2H5OH) at 100 K. I want gaseous ethanol at 373 K. How much energy do I need to add?
Answers: 2
Chemistry, 21.06.2019 23:00
At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas
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Chemistry, 22.06.2019 02:20
Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .
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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.
Answers: 1
I have 50.0 g of ethanol (C2H5OH) at 100 K. I want gaseous ethanol at 373 K. How much energy do I ne...
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