Now, using your periodic table C as a reference, type the symbols for the known elements into their appropriate groups and
periods in the modified table below. Note that we're using the international group numbers (1-18), followed by the American
scheme for the a group elements in parenthesis
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Chemistry, 22.06.2019 04:50
The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion
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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 12:00
the mississippians were considered to be horticulturalists, which means they were
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Chemistry, 22.06.2019 12:00
Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?
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Now, using your periodic table C as a reference, type the symbols for the known elements into their...
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