Naoh+h2so4=na2so4+h2o
cuantos gramos de naoh reaccionan con 16 gramos de h2so4...
Chemistry, 11.08.2019 20:10 aaronnnn6998
Naoh+h2so4=na2so4+h2o
cuantos gramos de naoh reaccionan con 16 gramos de h2so4
Answers: 1
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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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the mississippians were considered to be horticulturalists, which means they were
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The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false
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